IL109236A - A-alumina powder and its production - Google Patents

A-alumina powder and its production

Info

Publication number: IL109236A
Authority: IL; Israel
Prior art keywords: compound; alumina; alumina powder; shape; powder
Prior art date: 1993-04-13

Application number

IL10923694A

Other languages

English (en)

Hebrew (he)

Other versions

IL109236A0 (en

Original Assignee

Sumitomo Chemical Co

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1993-04-13

Filing date

1994-04-06

Publication date

1998-01-04

1994-04-06 Application filed by Sumitomo Chemical Co filed Critical Sumitomo Chemical Co

1994-07-31 Publication of IL109236A0 publication Critical patent/IL109236A0/xx

1998-01-04 Publication of IL109236A publication Critical patent/IL109236A/en

Links

PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims description 234
239000000843 powder Substances 0.000 title claims description 120
239000002245 particle Substances 0.000 claims description 80
238000001354 calcination Methods 0.000 claims description 74
239000007789 gas Substances 0.000 claims description 65
239000013078 crystal Substances 0.000 claims description 59
230000007704 transition Effects 0.000 claims description 59
238000000034 method Methods 0.000 claims description 44
239000003795 chemical substances by application Substances 0.000 claims description 34
230000008569 process Effects 0.000 claims description 34
239000002243 precursor Substances 0.000 claims description 20
CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 claims description 16
-1 aluminum compound Chemical class 0.000 claims description 15
229910000039 hydrogen halide Inorganic materials 0.000 claims description 11
239000012433 hydrogen halide Substances 0.000 claims description 11
VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
229910052782 aluminium Inorganic materials 0.000 claims description 10
150000001875 compounds Chemical class 0.000 claims description 10
229910000041 hydrogen chloride Inorganic materials 0.000 claims description 10
IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 10
229910000042 hydrogen bromide Inorganic materials 0.000 claims description 8
238000010438 heat treatment Methods 0.000 claims description 6
150000004767 nitrides Chemical class 0.000 claims description 6
229910052727 yttrium Inorganic materials 0.000 claims description 6
229910052720 vanadium Inorganic materials 0.000 claims description 5
GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 claims description 5
XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 claims description 4
229910000043 hydrogen iodide Inorganic materials 0.000 claims description 4
VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 4
ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
229910052796 boron Inorganic materials 0.000 claims description 3
229910052746 lanthanum Inorganic materials 0.000 claims description 3
FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 3
229910052726 zirconium Inorganic materials 0.000 claims description 3
OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
229910052684 Cerium Inorganic materials 0.000 claims description 2
RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
229910052779 Neodymium Inorganic materials 0.000 claims description 2
HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
229910052791 calcium Inorganic materials 0.000 claims description 2
239000011575 calcium Substances 0.000 claims description 2
ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 claims description 2
229910052802 copper Inorganic materials 0.000 claims description 2
239000010949 copper Substances 0.000 claims description 2
150000004820 halides Chemical class 0.000 claims description 2
239000011777 magnesium Substances 0.000 claims description 2
229910052749 magnesium Inorganic materials 0.000 claims description 2
229910052750 molybdenum Inorganic materials 0.000 claims description 2
239000011733 molybdenum Substances 0.000 claims description 2
QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 2
229910052758 niobium Inorganic materials 0.000 claims description 2
239000010955 niobium Substances 0.000 claims description 2
GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 2
229910052710 silicon Inorganic materials 0.000 claims description 2
239000010703 silicon Substances 0.000 claims description 2
229910052712 strontium Inorganic materials 0.000 claims description 2
CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 2
229910052725 zinc Inorganic materials 0.000 claims description 2
239000011701 zinc Substances 0.000 claims description 2
150000003682 vanadium compounds Chemical class 0.000 claims 3
239000005749 Copper compound Substances 0.000 claims 2
150000001639 boron compounds Chemical class 0.000 claims 2
229940043430 calcium compound Drugs 0.000 claims 2
150000001674 calcium compounds Chemical class 0.000 claims 2
150000001785 cerium compounds Chemical class 0.000 claims 2
150000001845 chromium compounds Chemical class 0.000 claims 2
150000001880 copper compounds Chemical class 0.000 claims 2
150000002506 iron compounds Chemical class 0.000 claims 2
150000002681 magnesium compounds Chemical class 0.000 claims 2
239000005078 molybdenum compound Substances 0.000 claims 2
150000002752 molybdenum compounds Chemical class 0.000 claims 2
150000002798 neodymium compounds Chemical class 0.000 claims 2
150000002816 nickel compounds Chemical class 0.000 claims 2
150000003377 silicon compounds Chemical class 0.000 claims 2
150000003438 strontium compounds Chemical class 0.000 claims 2
150000003609 titanium compounds Chemical class 0.000 claims 2
150000003752 zinc compounds Chemical class 0.000 claims 2
150000002604 lanthanum compounds Chemical class 0.000 claims 1
150000002822 niobium compounds Chemical class 0.000 claims 1
150000002825 nitriles Chemical class 0.000 claims 1
150000003755 zirconium compounds Chemical class 0.000 claims 1
239000011164 primary particle Substances 0.000 description 42
WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 35
150000002367 halogens Chemical class 0.000 description 30
238000009826 distribution Methods 0.000 description 28
239000003153 chemical reaction reagent Substances 0.000 description 22
MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 21
230000000052 comparative effect Effects 0.000 description 21
239000002994 raw material Substances 0.000 description 20
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 17
229910052736 halogen Inorganic materials 0.000 description 17
238000000354 decomposition reaction Methods 0.000 description 14
239000000203 mixture Substances 0.000 description 14
229910052739 hydrogen Inorganic materials 0.000 description 12
239000000126 substance Substances 0.000 description 11
229910052731 fluorine Inorganic materials 0.000 description 10
239000000463 material Substances 0.000 description 10
JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 9
239000000395 magnesium oxide Substances 0.000 description 9
CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 9
AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 9
238000002156 mixing Methods 0.000 description 9
229940037003 alum Drugs 0.000 description 8
239000000945 filler Substances 0.000 description 8
229910052757 nitrogen Inorganic materials 0.000 description 8
GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 7
239000003082 abrasive agent Substances 0.000 description 7
XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
238000001027 hydrothermal synthesis Methods 0.000 description 7
239000007858 starting material Substances 0.000 description 7
XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
230000001186 cumulative effect Effects 0.000 description 6
239000001257 hydrogen Substances 0.000 description 6
238000004131 Bayer process Methods 0.000 description 5
UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 5
150000002431 hydrogen Chemical class 0.000 description 5
VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
XZXYQEHISUMZAT-UHFFFAOYSA-N 2-[(2-hydroxy-5-methylphenyl)methyl]-4-methylphenol Chemical compound CC1=CC=C(O)C(CC=2C(=CC=C(C)C=2)O)=C1 XZXYQEHISUMZAT-UHFFFAOYSA-N 0.000 description 4
DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 4
ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 4
ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 description 4
229940107816 ammonium iodide Drugs 0.000 description 4
230000015572 biosynthetic process Effects 0.000 description 4
239000000460 chlorine Substances 0.000 description 4
229910052801 chlorine Inorganic materials 0.000 description 4
230000007547 defect Effects 0.000 description 4
230000004907 flux Effects 0.000 description 4
229910000040 hydrogen fluoride Inorganic materials 0.000 description 4
230000007062 hydrolysis Effects 0.000 description 4
238000006460 hydrolysis reaction Methods 0.000 description 4
MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 4
229910052751 metal Inorganic materials 0.000 description 4
239000002184 metal Substances 0.000 description 4
150000002739 metals Chemical class 0.000 description 4
PLDDOISOJJCEMH-UHFFFAOYSA-N neodymium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Nd+3].[Nd+3] PLDDOISOJJCEMH-UHFFFAOYSA-N 0.000 description 4
239000000047 product Substances 0.000 description 4
125000006850 spacer group Chemical group 0.000 description 4
PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 3
WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 3
XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
239000003570 air Substances 0.000 description 3
DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 3
229910052786 argon Inorganic materials 0.000 description 3
229910052810 boron oxide Inorganic materials 0.000 description 3
BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
239000000292 calcium oxide Substances 0.000 description 3
239000000919 ceramic Substances 0.000 description 3
239000003085 diluting agent Substances 0.000 description 3
239000011737 fluorine Substances 0.000 description 3
238000000227 grinding Methods 0.000 description 3
238000010191 image analysis Methods 0.000 description 3
239000011261 inert gas Substances 0.000 description 3
230000001788 irregular Effects 0.000 description 3
229910001862 magnesium hydroxide Inorganic materials 0.000 description 3
URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 3
BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 3
PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 3
GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 3
239000011163 secondary particle Substances 0.000 description 3
238000002525 ultrasonication Methods 0.000 description 3
WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 2
230000002378 acidificating effect Effects 0.000 description 2
SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 description 2
VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical group Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
IOGARICUVYSYGI-UHFFFAOYSA-K azanium (4-oxo-1,3,2-dioxalumetan-2-yl) carbonate Chemical compound [NH4+].[Al+3].[O-]C([O-])=O.[O-]C([O-])=O IOGARICUVYSYGI-UHFFFAOYSA-K 0.000 description 2
GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 2
229910052794 bromium Inorganic materials 0.000 description 2
238000006243 chemical reaction Methods 0.000 description 2
230000000694 effects Effects 0.000 description 2
239000008393 encapsulating agent Substances 0.000 description 2
VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
239000000347 magnesium hydroxide Substances 0.000 description 2
235000012254 magnesium hydroxide Nutrition 0.000 description 2
230000007246 mechanism Effects 0.000 description 2
150000001247 metal acetylides Chemical class 0.000 description 2
CMOAHYOGLLEOGO-UHFFFAOYSA-N oxozirconium;dihydrochloride Chemical compound Cl.Cl.[Zr]=O CMOAHYOGLLEOGO-UHFFFAOYSA-N 0.000 description 2
238000007750 plasma spraying Methods 0.000 description 2
IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Chemical compound [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 description 2
238000003786 synthesis reaction Methods 0.000 description 2
229910052719 titanium Inorganic materials 0.000 description 2
239000010936 titanium Substances 0.000 description 2
229910001935 vanadium oxide Inorganic materials 0.000 description 2
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
229910002012 Aerosil® Inorganic materials 0.000 description 1
QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
235000010724 Wisteria floribunda Nutrition 0.000 description 1
238000005299 abrasion Methods 0.000 description 1
230000001133 acceleration Effects 0.000 description 1
239000011473 acid brick Substances 0.000 description 1
LCQXXBOSCBRNNT-UHFFFAOYSA-K ammonium aluminium sulfate Chemical compound [NH4+].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O LCQXXBOSCBRNNT-UHFFFAOYSA-K 0.000 description 1
239000007864 aqueous solution Substances 0.000 description 1
239000003125 aqueous solvent Substances 0.000 description 1
238000000498 ball milling Methods 0.000 description 1
229910001570 bauxite Inorganic materials 0.000 description 1
229910001593 boehmite Inorganic materials 0.000 description 1
150000001638 boron Chemical class 0.000 description 1
239000012159 carrier gas Substances 0.000 description 1
239000003054 catalyst Substances 0.000 description 1
229910000420 cerium oxide Inorganic materials 0.000 description 1
230000008859 change Effects 0.000 description 1
229910052804 chromium Inorganic materials 0.000 description 1
239000011651 chromium Substances 0.000 description 1
229910000423 chromium oxide Inorganic materials 0.000 description 1
239000011362 coarse particle Substances 0.000 description 1
PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
238000005260 corrosion Methods 0.000 description 1
230000007797 corrosion Effects 0.000 description 1
229910052593 corundum Inorganic materials 0.000 description 1
239000010431 corundum Substances 0.000 description 1
230000001419 dependent effect Effects 0.000 description 1
229910001873 dinitrogen Inorganic materials 0.000 description 1
238000001035 drying Methods 0.000 description 1
238000005530 etching Methods 0.000 description 1
150000002221 fluorine Chemical class 0.000 description 1
239000007792 gaseous phase Substances 0.000 description 1
230000008570 general process Effects 0.000 description 1
229910002804 graphite Inorganic materials 0.000 description 1
239000010439 graphite Substances 0.000 description 1
150000002366 halogen compounds Chemical class 0.000 description 1
FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
238000009776 industrial production Methods 0.000 description 1
239000013067 intermediate product Substances 0.000 description 1
PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
229910052740 iodine Inorganic materials 0.000 description 1
239000011630 iodine Substances 0.000 description 1
229910052742 iron Inorganic materials 0.000 description 1
238000005259 measurement Methods 0.000 description 1
238000002844 melting Methods 0.000 description 1
230000008018 melting Effects 0.000 description 1
229910044991 metal oxide Inorganic materials 0.000 description 1
150000004706 metal oxides Chemical class 0.000 description 1
238000001000 micrograph Methods 0.000 description 1
238000003801 milling Methods 0.000 description 1
238000012986 modification Methods 0.000 description 1
230000004048 modification Effects 0.000 description 1
229910000476 molybdenum oxide Inorganic materials 0.000 description 1
229910052759 nickel Inorganic materials 0.000 description 1
229910000480 nickel oxide Inorganic materials 0.000 description 1
229910000484 niobium oxide Inorganic materials 0.000 description 1
239000003960 organic solvent Substances 0.000 description 1
SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
UFQXGXDIJMBKTC-UHFFFAOYSA-N oxostrontium Chemical compound [Sr]=O UFQXGXDIJMBKTC-UHFFFAOYSA-N 0.000 description 1
RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
238000012856 packing Methods 0.000 description 1
229920000642 polymer Polymers 0.000 description 1
239000011148 porous material Substances 0.000 description 1
GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 description 1
230000001376 precipitating effect Effects 0.000 description 1
239000010453 quartz Substances 0.000 description 1
229920006395 saturated elastomer Polymers 0.000 description 1
229910052814 silicon oxide Inorganic materials 0.000 description 1
239000002904 solvent Substances 0.000 description 1
238000003756 stirring Methods 0.000 description 1
OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
239000002699 waste material Substances 0.000 description 1
239000011787 zinc oxide Substances 0.000 description 1
229910001928 zirconium oxide Inorganic materials 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/30—Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
- C01F7/32—Thermal decomposition of sulfates including complex sulfates, e.g. alums
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
- C01F7/441—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination
- C01F7/442—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination in presence of a calcination additive
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/04—Particle morphology depicted by an image obtained by TEM, STEM, STM or AFM
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
- C01P2004/32—Spheres
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
- C01P2004/40—Particle morphology extending in three dimensions prism-like
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
- C01P2004/42—(bi)pyramid-like
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/51—Particles with a specific particle size distribution
- C01P2004/52—Particles with a specific particle size distribution highly monodisperse size distribution
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/54—Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/11—Powder tap density
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/21—Attrition-index or crushing strength of granulates

Landscapes

Chemical & Material Sciences (AREA)
Organic Chemistry (AREA)
Life Sciences & Earth Sciences (AREA)
Geology (AREA)
Inorganic Chemistry (AREA)
Physics & Mathematics (AREA)
Thermal Sciences (AREA)
Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

IL10923694A 1993-04-13 1994-04-06 A-alumina powder and its production IL109236A (en)

Applications Claiming Priority (7)

Application Number	Priority Date	Filing Date	Title
JP11097193		1993-04-13
JP11097293		1993-04-13
JP18891493		1993-06-30
JP18891293		1993-06-30
JP19427793		1993-07-08
JP31413193		1993-11-19
JP33875893		1993-12-01

Publications (2)

Publication Number	Publication Date
IL109236A0 IL109236A0 (en)	1994-07-31
IL109236A true IL109236A (en)	1998-01-04

Family

ID=27565776

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IL10923694A IL109236A (en)	1993-04-13	1994-04-06	A-alumina powder and its production

Country Status (8)

Country	Link
US (2)	US5935550A (fr)
EP (1)	EP0620188B1 (fr)
CN (1)	CN1069290C (fr)
AU (1)	AU679489B2 (fr)
CA (1)	CA2121198A1 (fr)
DE (1)	DE69419342T2 (fr)
IL (1)	IL109236A (fr)
RU (1)	RU2118612C1 (fr)

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE69510989T2 (de) *	1994-04-28	2000-01-20	Sumitomo Chemical Co., Ltd.	Verfahren zur Herstellung von Alpha-Aluminiumoxidpulver
EP0714850B1 (fr) *	1994-11-30	1999-07-28	Sumitomo Chemical Company, Limited	Procédé de fabrication d'une poudre d'oxyde métallique double
AUPN053395A0 (en) *	1995-01-12	1995-02-09	Alcoa Of Australia Limited	Production of alpha alumina
US7067105B2 (en) *	1999-12-27	2006-06-27	Showa Denko K.K.	Alumina particles, production process thereof, composition comprising the particles and alumina slurry for polishing
EP1256548A4 (fr) *	1999-12-27	2004-05-19	Showa Denko Kk	Particules d'alumine, procede de production correspondant. composition comprenant lesdites particules, et boue d'alumine a polir
TW504497B (en)	2000-05-23	2002-10-01	Sumitomo Chemical Co	Alpha-alumina powder and heat-conductive sheet containing the same
JP4122746B2 (ja)	2001-05-21	2008-07-23	住友化学株式会社	微粒αアルミナ粉末の製造方法
CA2479958C (fr) *	2002-03-22	2009-11-03	Holofiber, Llc	Composition de fibres polymeriques et methode s'y rapportant
JP2004123445A (ja) *	2002-10-02	2004-04-22	Sumitomo Chem Co Ltd	αアルミナ粉末およびその製造方法
TW200422258A (en) *	2003-02-26	2004-11-01	Sumitomo Chemical Co	Method for producing α-alumina powder
TWI348457B (en) *	2003-03-04	2011-09-11	Sumitomo Chemical Co	Method for producing 帢-alumina particulate
TW200540116A (en) *	2004-03-16	2005-12-16	Sumitomo Chemical Co	Method for producing an α-alumina powder
TWI367864B (en) *	2004-03-17	2012-07-11	Sumitomo Chemical Co	A method for producing an α-alumina particle
JP4487689B2 (ja) *	2004-08-26	2010-06-23	日産自動車株式会社	アルミナ粒子、アルミナ粒子の製造方法、樹脂組成物、及び樹脂組成物の製造方法
US8536083B2 (en)	2004-09-01	2013-09-17	Shell Oil Company	Olefin epoxidation process, a catalyst for use in the process, a carrier for use in preparing the catalyst, and a process for preparing the carrier
KR20070058576A (ko) *	2004-09-01	2007-06-08	셀 인터나쵸나아레 레사아치 마아츠샤피 비이부이	올레핀 에폭시화 방법, 이 방법에 사용되는 촉매, 이촉매의 제조에 사용되는 담체, 및 이 담체의 제조방법
JP4940556B2 (ja) *	2004-09-07	2012-05-30	日産自動車株式会社	樹脂組成物
US7935382B2 (en) *	2005-12-20	2011-05-03	Momentive Performance Materials, Inc.	Method for making crystalline composition
RU2009120540A (ru) *	2006-11-01	2010-12-10	Дау Глобал Текнолоджиз Инк. (Us)	Формованные пористые элементы из альфа-оксида алюминия и способы их получения
RU2462416C2 (ru) *	2007-01-15	2012-09-27	Сэнт-Гобэн Керамикс Энд Пластикс, Инк.	Керамический порошковый материал (варианты) и способ его изготовления
JP2008311221A (ja) *	2007-05-14	2008-12-25	Sumitomo Chemical Co Ltd	積層多孔質フィルム
JP5109789B2 (ja) *	2007-05-14	2012-12-26	住友化学株式会社	多孔質フィルムの製造方法
US7714152B2 (en) *	2007-08-30	2010-05-11	Sd Lizenzverwertungsgesellschaft Mbh & Co. Kg	Carrier for olefin oxide catalyst
US8157912B2 (en) *	2007-09-11	2012-04-17	Osram Sylvania Inc.	Method of converting PCA to sapphire and converted article
FR2943333B1 (fr) *	2009-03-20	2011-08-05	Baikowski	Alumine, luminophores et composes mixtes ainsi que procedes de preparation associes
US20110028770A1 (en) *	2009-08-03	2011-02-03	Honeywell International Inc.	Hydrogenation catalyst
KR101858481B1 (ko)	2011-03-23	2018-06-27	다이메이카가쿠코교가부시키가이샤	알루미나 컴포지트, 알루미나 컴포지트의 제조방법 및 알루미나 컴포지트 함유 고분자 조성물
US10252945B2 (en)	2012-09-26	2019-04-09	Multiple Energy Technologies Llc	Bioceramic compositions
WO2014051091A1 (fr) *	2012-09-28	2014-04-03	Dic株式会社	MICROPARTICULES D'ALUMINE α ET LEUR PROCÉDÉ DE PRODUCTION
WO2015171467A1 (fr)	2014-05-05	2015-11-12	Multiple Energy Technologies Llc	Compositions biocéramiques et leurs utilisations à des fins biomodulatrices
CN104528787B (zh) *	2014-12-19	2016-01-20	贵州天合国润高新材料科技有限公司	一种制备细粒径氧化铝粉末的方法
JP6121074B1 (ja)	2015-09-16	2017-04-26	大日精化工業株式会社	アルミナ系熱伝導性酸化物及びその製造方法
HUE059556T2 (hu)	2016-05-16	2022-11-28	Martinswerk Gmbh	Timföld termékek és alkalmazásaik olyan polimer kompoziciókban, amelyek nagy hõvezetési tényezõvel rendelkeznek
CN107540006A (zh) *	2016-06-29	2018-01-05	中国科学院大连化学物理研究所	一种微米尺寸的八面体氧化铝的制备方法
WO2018112810A1 (fr) *	2016-12-22	2018-06-28	Dic Corporation	MÉTHODE DE PRODUCTION DE PARTICULES D'α-ALUMINE ET MÉTHODE DE PRODUCTION D'UNE COMPOSITION DE RÉSINE
JP6209695B1 (ja) *	2017-03-02	2017-10-04	大日精化工業株式会社	アルミナ系熱伝導性酸化物及びその製造方法
FR3067617B1 (fr) *	2017-06-20	2019-07-19	Arkema France	Catalyseur a base d'alumine alpha et procede d'hydrogenation d'une olefine en presence de celui-ci.
EP3674274B1 (fr) *	2017-12-19	2022-02-16	Showa Denko K.K.	Grains d'alumine fusionnés, leur procédé de production, meule et abrasif revêtu
CN109835929B (zh) *	2019-04-15	2021-03-23	郑州鑫发材料科技有限公司	一种用匣钵煅烧制备片状α-氧化铝粉体的方法
CN112708928B (zh) *	2019-10-25	2021-10-08	中国石油化工股份有限公司	一种氧化铝晶粒及其制备方法
CN112978776B (zh) *	2019-12-02	2023-01-10	中国石油化工股份有限公司	一种γ-氧化铝八面体颗粒及其制备方法
CN112978771B (zh) *	2019-12-02	2023-01-10	中国石油化工股份有限公司	一种高比表面γ-氧化铝八面体颗粒及其制备方法
CN112897996B (zh) *	2021-01-27	2023-02-03	中铝山东有限公司	一种原晶粒集中的α氧化铝的制备方法及粒径的控制方法
CN113184886B (zh) *	2021-04-14	2023-01-31	雅安百图高新材料股份有限公司	一种高导热球形氧化铝的制备方法及产品
CN114656246B (zh) *	2022-04-01	2022-12-06	广东工业大学	一种正八面体α氧化铝及其制备方法和应用
CN115895453B (zh) *	2022-11-10	2023-09-08	湖北五方光电股份有限公司	一种红外截止滤光片用抛光液及其制备方法和应用

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1159418B (de) *	1961-04-01	1963-12-19	Vaw Ver Aluminium Werke Ag	Verfahren zur Calcination von Aluminiumhydroxid
US3175883A (en) *	1961-06-05	1965-03-30	Aluminium Lab Ltd	Process for reducing the soda content of alumina
GB1046582A (en) *	1964-03-04	1966-10-26	Gen Motors Ltd	Improved method of producing alumina
AT266780B (de) *	1967-05-19	1968-11-25	Giulini Gmbh Geb	Verfahren zur Herstellung von natriumoxydarmem α-Aluminiumoxyd
JPS5037806A (fr) *	1973-06-27	1975-04-08
US4193768A (en) *	1975-07-28	1980-03-18	Showa Denko K. K.	Method for preparing corundum particles
DE2623482C2 (de) *	1976-05-26	1985-06-27	Alcoa Chemie GmbH, 6700 Ludwigshafen	Verfahren zur Herstellung eines kristallinen Aluminiumoxids für Polier-, Läpp- und Schleifmittel
DE2850064B1 (de) *	1978-11-18	1980-05-08	Giulini Chemie	Hexagonale tafelfoermige alpha-Aluminiumoxid-Einkristalle und Verfahren zu ihrer Herstellung
HU185474B (en) *	1981-11-10	1985-02-28	Almasfuezitoei Timfoeldgyar	Process for preparing alpha-aluminium oxyde poor in alkali for ceramic purposes
ATE26819T1 (de) *	1982-08-24	1987-05-15	Alusuisse	Verfahren zur herstellung von kristalliner tonerde.
IT1184114B (it) *	1985-01-18	1987-10-22	Montedison Spa	Alfa allumina sotto forma di particelle sferiche,non aggregate,a distribuzione granulometrica ristretta e di dimensioni inferiori a 2 micron,e processo per la sua preparazione
US4657754A (en) *	1985-11-21	1987-04-14	Norton Company	Aluminum oxide powders and process
US5340781A (en) *	1986-07-14	1994-08-23	Showa Denko Kabushiki Kaisha	Spherical corundum particles, process for preparation thereof and rubber or plastic composition having high thermal conductivity and having spherical corundum paticles incorporated therein
US4847064A (en) *	1987-12-23	1989-07-11	Aluminum Company Of America	Economical process for alpha alumina production
DE3870637D1 (de) *	1987-01-29	1992-06-11	Sumitomo Chemical Co	Verfahren zur herstellung von aluminiumoxid.
US4822592A (en) *	1987-02-05	1989-04-18	Aluminum Company Of America	Producing alpha alumina particles with pressurized acidic steam
US4806198A (en) *	1987-11-02	1989-02-21	Cornell Research Foundation, Inc.	Producing alpha-alumina whiskers
US5149520A (en) *	1987-12-23	1992-09-22	Aluminum Company Of America	Small sized alpha alumina particles and platelets
EP0644278B1 (fr) *	1992-06-02	1999-04-21	Sumitomo Chemical Company, Limited	Alpha-alumine
JP3744010B2 (ja) *	1993-06-30	2006-02-08	住友化学株式会社	α−アルミナ粉末の製造方法
RU2138461C1 (ru) *	1993-07-27	1999-09-27	Сумитомо Кемикал Компани, Лимитед	Алюмооксидная композиция (варианты) и способ получения алюмооксидной керамики
US5549746A (en) *	1993-09-24	1996-08-27	General Electric Company	Solid state thermal conversion of polycrystalline alumina to sapphire using a seed crystal

1994
- 1994-04-06 IL IL10923694A patent/IL109236A/en not_active IP Right Cessation
- 1994-04-12 RU RU94012560A patent/RU2118612C1/ru active
- 1994-04-12 AU AU59410/94A patent/AU679489B2/en not_active Ceased
- 1994-04-13 DE DE69419342T patent/DE69419342T2/de not_active Expired - Lifetime
- 1994-04-13 CN CN94105290A patent/CN1069290C/zh not_active Expired - Lifetime
- 1994-04-13 EP EP94302622A patent/EP0620188B1/fr not_active Expired - Lifetime
- 1994-04-13 CA CA002121198A patent/CA2121198A1/fr not_active Abandoned
1996
- 1996-02-26 US US08/606,679 patent/US5935550A/en not_active Expired - Lifetime
1999
- 1999-04-06 US US09/286,255 patent/US6159441A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
CN1095360A (zh)	1994-11-23
US6159441A (en)	2000-12-12
US5935550A (en)	1999-08-10
RU2118612C1 (ru)	1998-09-10
EP0620188B1 (fr)	1999-07-07
AU679489B2 (en)	1997-07-03
CA2121198A1 (fr)	1994-10-14
IL109236A0 (en)	1994-07-31
DE69419342D1 (de)	1999-08-12
EP0620188A3 (en)	1995-09-20
AU5941094A (en)	1994-10-20
EP0620188A2 (fr)	1994-10-19
CN1069290C (zh)	2001-08-08
DE69419342T2 (de)	1999-12-16

Legal Events

Date	Code	Title
1998-06-15	FF	Patent granted
1998-12-06	KB	Patent renewed
2000-08-31	KB	Patent renewed
2005-07-25	MM9K	Patent not in force due to non-payment of renewal fees

Publication	Publication Date	Title
US5935550A (en)	1999-08-10	α-alumina powder and process for producing the same
KR100292424B1 (ko)	2001-09-17	알파-알루미나의제조방법
JP3744006B2 (ja)	2006-02-08	α−アルミナ粉末およびその製造方法
EP0656319B1 (fr)	2003-04-09	Procédé pour production de poudre d'alumine-alpha
US5538709A (en)	1996-07-23	Process for producing alpha-alumina powder
EP0636579B1 (fr)	2001-02-28	Composition, article moulé et céramiques à base d'alumine et procédé de préparation de céramiques
RU2137715C1 (ru)	1999-09-20	Порошок комплексного оксида металла, порошок иттрий-алюминиевого граната (варианты) и способ получения порошка комплексного оксида металла
US6521203B1 (en)	2003-02-18	Process for producing α-alumina
PL174893B1 (pl)	1998-09-30	Sposób wytwarzania alfa-tlenku glinowego