CA2525259C - Poudres metalliques obtenues par reduction d'oxides au moyen de magnesium gazeux - Google Patents

Poudres metalliques obtenues par reduction d'oxides au moyen de magnesium gazeux Download PDF

Info

Publication number: CA2525259C
Authority: CA; Canada
Prior art keywords: powder; niobium; powder according; tantalum; metal
Prior art date: 1998-05-06
Legal status (The legal status 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 status listed.): Expired - Lifetime

Application number

CA002525259A

Other languages

English (en)

Other versions

CA2525259A1 (fr

Inventor

Leonid N. Shekhter

Terrance B. Tripp

Leonid L. Lanin

Karlheinz Reichert

Oliver Thomas

Joachim Vieregge

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Taniobis GmbH

Original Assignee

HC Starck GmbH

HC Starck Inc

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.)

1998-05-06

Filing date

1999-05-05

Publication date

2009-07-28

1998-05-06 Priority claimed from US09/073,488 external-priority patent/US6171363B1/en

1998-07-13 Priority claimed from DE19831280A external-priority patent/DE19831280A1/de

1999-05-05 Application filed by HC Starck GmbH, HC Starck Inc filed Critical HC Starck GmbH

1999-05-05 Priority claimed from CA2331707A external-priority patent/CA2331707C/fr

2000-11-16 Publication of CA2525259A1 publication Critical patent/CA2525259A1/fr

2009-07-28 Application granted granted Critical

2009-07-28 Publication of CA2525259C publication Critical patent/CA2525259C/fr

2019-05-05 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

239000000843 powder Substances 0.000 title claims abstract description 182
229910052751 metal Inorganic materials 0.000 title claims abstract description 100
239000002184 metal Substances 0.000 title claims abstract description 99
230000009467 reduction Effects 0.000 title abstract description 81
239000011777 magnesium Substances 0.000 title description 71
229910052749 magnesium Inorganic materials 0.000 title description 55
FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title description 46
229910052715 tantalum Inorganic materials 0.000 claims abstract description 74
239000003990 capacitor Substances 0.000 claims abstract description 70
229910052758 niobium Inorganic materials 0.000 claims abstract description 56
150000002739 metals Chemical class 0.000 claims abstract description 31
229910052750 molybdenum Inorganic materials 0.000 claims abstract description 9
229910052719 titanium Inorganic materials 0.000 claims abstract description 8
229910052721 tungsten Inorganic materials 0.000 claims abstract description 8
229910052720 vanadium Inorganic materials 0.000 claims abstract description 7
229910052726 zirconium Inorganic materials 0.000 claims abstract description 7
229910052735 hafnium Inorganic materials 0.000 claims abstract description 6
239000010955 niobium Substances 0.000 claims description 72
GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 68
GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 60
239000000956 alloy Substances 0.000 claims description 42
229910045601 alloy Inorganic materials 0.000 claims description 41
238000004519 manufacturing process Methods 0.000 claims description 30
238000005245 sintering Methods 0.000 claims description 27
239000002245 particle Substances 0.000 claims description 26
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 24
229910052760 oxygen Inorganic materials 0.000 claims description 24
239000001301 oxygen Substances 0.000 claims description 24
239000011164 primary particle Substances 0.000 claims description 16
239000003792 electrolyte Substances 0.000 claims description 10
229910001362 Ta alloys Inorganic materials 0.000 claims description 9
239000012535 impurity Substances 0.000 claims description 9
229910052799 carbon Inorganic materials 0.000 claims description 7
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
238000002048 anodisation reaction Methods 0.000 claims description 6
229910052757 nitrogen Inorganic materials 0.000 claims description 4
239000007784 solid electrolyte Substances 0.000 claims description 4
RHDUVDHGVHBHCL-UHFFFAOYSA-N niobium tantalum Chemical compound [Nb].[Ta] RHDUVDHGVHBHCL-UHFFFAOYSA-N 0.000 claims description 3
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
239000003638 chemical reducing agent Substances 0.000 abstract description 32
229910044991 metal oxide Inorganic materials 0.000 abstract description 14
150000004706 metal oxides Chemical class 0.000 abstract description 13
238000002386 leaching Methods 0.000 abstract description 10
238000005054 agglomeration Methods 0.000 abstract description 2
230000002776 aggregation Effects 0.000 abstract description 2
229910052784 alkaline earth metal Inorganic materials 0.000 abstract 1
150000001342 alkaline earth metals Chemical class 0.000 abstract 1
238000006722 reduction reaction Methods 0.000 description 85
238000000034 method Methods 0.000 description 33
239000000047 product Substances 0.000 description 28
239000007789 gas Substances 0.000 description 22
239000000203 mixture Substances 0.000 description 21
239000011734 sodium Substances 0.000 description 21
230000008569 process Effects 0.000 description 20
XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 18
229910052708 sodium Inorganic materials 0.000 description 18
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 17
NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 15
CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 14
QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 14
239000008188 pellet Substances 0.000 description 14
238000006243 chemical reaction Methods 0.000 description 13
235000011007 phosphoric acid Nutrition 0.000 description 13
150000003839 salts Chemical class 0.000 description 13
229910001257 Nb alloy Inorganic materials 0.000 description 12
238000011946 reduction process Methods 0.000 description 12
239000000395 magnesium oxide Substances 0.000 description 11
239000000463 material Substances 0.000 description 11
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 11
239000002243 precursor Substances 0.000 description 11
PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 description 10
239000002253 acid Substances 0.000 description 9
229910052786 argon Inorganic materials 0.000 description 9
239000001257 hydrogen Substances 0.000 description 9
229910052739 hydrogen Inorganic materials 0.000 description 9
239000007787 solid Substances 0.000 description 9
239000000243 solution Substances 0.000 description 9
UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 8
ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Inorganic materials O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 8
BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 8
238000001878 scanning electron micrograph Methods 0.000 description 8
239000000126 substance Substances 0.000 description 8
239000011575 calcium Substances 0.000 description 7
239000007795 chemical reaction product Substances 0.000 description 7
239000011651 chromium Substances 0.000 description 7
229910000484 niobium oxide Inorganic materials 0.000 description 7
229910001936 tantalum oxide Inorganic materials 0.000 description 7
QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
229910052782 aluminium Inorganic materials 0.000 description 6
238000004458 analytical method Methods 0.000 description 6
239000007864 aqueous solution Substances 0.000 description 6
230000015572 biosynthetic process Effects 0.000 description 6
229910052791 calcium Inorganic materials 0.000 description 6
230000000694 effects Effects 0.000 description 6
238000000926 separation method Methods 0.000 description 6
238000005275 alloying Methods 0.000 description 5
238000001816 cooling Methods 0.000 description 5
150000004678 hydrides Chemical class 0.000 description 5
238000012545 processing Methods 0.000 description 5
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
229910003251 Na K Inorganic materials 0.000 description 4
229910052729 chemical element Inorganic materials 0.000 description 4
238000000975 co-precipitation Methods 0.000 description 4
150000001875 compounds Chemical class 0.000 description 4
238000011109 contamination Methods 0.000 description 4
239000003085 diluting agent Substances 0.000 description 4
238000010438 heat treatment Methods 0.000 description 4
229910052987 metal hydride Inorganic materials 0.000 description 4
150000004681 metal hydrides Chemical class 0.000 description 4
238000012360 testing method Methods 0.000 description 4
ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 3
XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
229910021529 ammonia Inorganic materials 0.000 description 3
238000013459 approach Methods 0.000 description 3
239000012298 atmosphere Substances 0.000 description 3
230000008901 benefit Effects 0.000 description 3
239000000919 ceramic Substances 0.000 description 3
230000008859 change Effects 0.000 description 3
239000003795 chemical substances by application Substances 0.000 description 3
238000009826 distribution Methods 0.000 description 3
230000002349 favourable effect Effects 0.000 description 3
229910052500 inorganic mineral Inorganic materials 0.000 description 3
239000007788 liquid Substances 0.000 description 3
229910052744 lithium Inorganic materials 0.000 description 3
239000011707 mineral Substances 0.000 description 3
238000002156 mixing Methods 0.000 description 3
230000007935 neutral effect Effects 0.000 description 3
229910017604 nitric acid Inorganic materials 0.000 description 3
150000004767 nitrides Chemical class 0.000 description 3
230000000704 physical effect Effects 0.000 description 3
229910052700 potassium Inorganic materials 0.000 description 3
239000000376 reactant Substances 0.000 description 3
239000011163 secondary particle Substances 0.000 description 3
OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
241000238586 Cirripedia Species 0.000 description 2
MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
229910000831 Steel Inorganic materials 0.000 description 2
150000007513 acids Chemical class 0.000 description 2
229910000147 aluminium phosphate Inorganic materials 0.000 description 2
LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 2
238000000137 annealing Methods 0.000 description 2
239000012300 argon atmosphere Substances 0.000 description 2
229910052788 barium Inorganic materials 0.000 description 2
238000001354 calcination Methods 0.000 description 2
230000015556 catabolic process Effects 0.000 description 2
229910052804 chromium Inorganic materials 0.000 description 2
230000001427 coherent effect Effects 0.000 description 2
239000013078 crystal Substances 0.000 description 2
230000007423 decrease Effects 0.000 description 2
239000008367 deionised water Substances 0.000 description 2
229910021641 deionized water Inorganic materials 0.000 description 2
238000010586 diagram Methods 0.000 description 2
FTPUNAWAGWERLA-UHFFFAOYSA-G dipotassium;heptafluoroniobium(2-) Chemical compound [F-].[F-].[F-].[F-].[F-].[F-].[F-].[K+].[K+].[Nb+5] FTPUNAWAGWERLA-UHFFFAOYSA-G 0.000 description 2
239000000706 filtrate Substances 0.000 description 2
238000005470 impregnation Methods 0.000 description 2
239000011261 inert gas Substances 0.000 description 2
229910052742 iron Inorganic materials 0.000 description 2
239000011572 manganese Substances 0.000 description 2
229910001092 metal group alloy Inorganic materials 0.000 description 2
239000011733 molybdenum Substances 0.000 description 2
229910052759 nickel Inorganic materials 0.000 description 2
230000003287 optical effect Effects 0.000 description 2
238000004806 packaging method and process Methods 0.000 description 2
238000002161 passivation Methods 0.000 description 2
239000011591 potassium Substances 0.000 description 2
230000001681 protective effect Effects 0.000 description 2
239000002994 raw material Substances 0.000 description 2
230000003068 static effect Effects 0.000 description 2
239000010959 steel Substances 0.000 description 2
238000003756 stirring Methods 0.000 description 2
238000011282 treatment Methods 0.000 description 2
239000012498 ultrapure water Substances 0.000 description 2
238000005406 washing Methods 0.000 description 2
238000005303 weighing Methods 0.000 description 2
VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
229910016287 MxOy Inorganic materials 0.000 description 1
-1 Nb-compounds Chemical class 0.000 description 1
229910020012 Nb—Ti Inorganic materials 0.000 description 1
QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
FOOXDURBAYEDBV-UHFFFAOYSA-N [Mg]O[Ta] Chemical class [Mg]O[Ta] FOOXDURBAYEDBV-UHFFFAOYSA-N 0.000 description 1
VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 description 1
230000003466 anti-cipated effect Effects 0.000 description 1
229910052787 antimony Inorganic materials 0.000 description 1
238000010923 batch production Methods 0.000 description 1
239000011230 binding agent Substances 0.000 description 1
238000009835 boiling Methods 0.000 description 1
239000006227 byproduct Substances 0.000 description 1
238000005266 casting Methods 0.000 description 1
239000003054 catalyst Substances 0.000 description 1
238000006555 catalytic reaction Methods 0.000 description 1
239000003153 chemical reaction reagent Substances 0.000 description 1
150000001805 chlorine compounds Chemical class 0.000 description 1
238000004140 cleaning Methods 0.000 description 1
238000000576 coating method Methods 0.000 description 1
238000009694 cold isostatic pressing Methods 0.000 description 1
238000002485 combustion reaction Methods 0.000 description 1
238000005056 compaction Methods 0.000 description 1
230000000052 comparative effect Effects 0.000 description 1
239000002131 composite material Substances 0.000 description 1
238000013329 compounding Methods 0.000 description 1
238000007596 consolidation process Methods 0.000 description 1
238000010924 continuous production Methods 0.000 description 1
229910052802 copper Inorganic materials 0.000 description 1
239000010949 copper Substances 0.000 description 1
230000009849 deactivation Effects 0.000 description 1
238000000280 densification Methods 0.000 description 1
239000006185 dispersion Substances 0.000 description 1
238000001035 drying Methods 0.000 description 1
238000005868 electrolysis reaction Methods 0.000 description 1
238000010894 electron beam technology Methods 0.000 description 1
238000005516 engineering process Methods 0.000 description 1
238000001914 filtration Methods 0.000 description 1
230000009969 flowable effect Effects 0.000 description 1
239000012530 fluid Substances 0.000 description 1
150000004673 fluoride salts Chemical class 0.000 description 1
229910052733 gallium Inorganic materials 0.000 description 1
239000008246 gaseous mixture Substances 0.000 description 1
238000001513 hot isostatic pressing Methods 0.000 description 1
238000004845 hydriding Methods 0.000 description 1
150000002431 hydrogen Chemical class 0.000 description 1
238000005984 hydrogenation reaction Methods 0.000 description 1
238000009854 hydrometallurgy Methods 0.000 description 1
XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
230000006872 improvement Effects 0.000 description 1
229910001026 inconel Inorganic materials 0.000 description 1
238000010348 incorporation Methods 0.000 description 1
229910052745 lead Inorganic materials 0.000 description 1
WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
239000007791 liquid phase Substances 0.000 description 1
239000000314 lubricant Substances 0.000 description 1
229910052748 manganese Inorganic materials 0.000 description 1
MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 1
239000011159 matrix material Substances 0.000 description 1
238000005259 measurement Methods 0.000 description 1
238000010297 mechanical methods and process Methods 0.000 description 1
238000002844 melting Methods 0.000 description 1
230000008018 melting Effects 0.000 description 1
150000002736 metal compounds Chemical class 0.000 description 1
238000000465 moulding Methods 0.000 description 1
230000003647 oxidation Effects 0.000 description 1
238000007254 oxidation reaction Methods 0.000 description 1
238000012856 packing Methods 0.000 description 1
239000012071 phase Substances 0.000 description 1
239000011148 porous material Substances 0.000 description 1
230000001376 precipitating effect Effects 0.000 description 1
238000002360 preparation method Methods 0.000 description 1
238000003825 pressing Methods 0.000 description 1
238000000197 pyrolysis Methods 0.000 description 1
239000011541 reaction mixture Substances 0.000 description 1
238000011084 recovery Methods 0.000 description 1
238000012552 review Methods 0.000 description 1
238000007873 sieving Methods 0.000 description 1
229910021332 silicide Inorganic materials 0.000 description 1
229910052710 silicon Inorganic materials 0.000 description 1
239000011780 sodium chloride Substances 0.000 description 1
238000005728 strengthening Methods 0.000 description 1
229910052712 strontium Inorganic materials 0.000 description 1
239000000758 substrate Substances 0.000 description 1
229910052717 sulfur Inorganic materials 0.000 description 1
238000003786 synthesis reaction Methods 0.000 description 1
ZIRLXLUNCURZTP-UHFFFAOYSA-I tantalum(5+);pentahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[Ta+5] ZIRLXLUNCURZTP-UHFFFAOYSA-I 0.000 description 1
OEIMLTQPLAGXMX-UHFFFAOYSA-I tantalum(v) chloride Chemical compound Cl[Ta](Cl)(Cl)(Cl)Cl OEIMLTQPLAGXMX-UHFFFAOYSA-I 0.000 description 1
229910052718 tin Inorganic materials 0.000 description 1
WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
239000010937 tungsten Substances 0.000 description 1
238000002604 ultrasonography Methods 0.000 description 1
230000000007 visual effect Effects 0.000 description 1
239000011800 void material Substances 0.000 description 1
239000002699 waste material Substances 0.000 description 1
230000004580 weight loss Effects 0.000 description 1
238000003466 welding Methods 0.000 description 1
238000010626 work up procedure Methods 0.000 description 1
229910052725 zinc Inorganic materials 0.000 description 1

Landscapes

Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Powder Metallurgy (AREA)
Manufacture And Refinement Of Metals (AREA)

CA002525259A 1998-05-06 1999-05-05 Poudres metalliques obtenues par reduction d'oxides au moyen de magnesium gazeux Expired - Lifetime CA2525259C (fr)

Applications Claiming Priority (5)

Application Number	Priority Date	Filing Date	Title
US09/073,488 US6171363B1 (en)	1998-05-06	1998-05-06	Method for producing tantallum/niobium metal powders by the reduction of their oxides with gaseous magnesium
US09/073,488		1998-05-06
DE19831280.6		1998-07-13
DE19831280A DE19831280A1 (de)	1998-07-13	1998-07-13	Verfahren zur Herstellung von Erdsäuremetallpulvern, insbesondere Niobpulvern
CA2331707A CA2331707C (fr)	1998-05-06	1999-05-05	Reduction de poudre d'oxyde de nb ou de ta par metal gazeux leger ou l'un de ses hydrures

Related Parent Applications (1)

Application Number	Title	Priority Date	Filing Date
CA2331707A Division CA2331707C (fr)	1998-05-06	1999-05-05	Reduction de poudre d'oxyde de nb ou de ta par metal gazeux leger ou l'un de ses hydrures

Publications (2)

Publication Number	Publication Date
CA2525259A1 CA2525259A1 (fr)	2000-11-16
CA2525259C true CA2525259C (fr)	2009-07-28

Family

ID=35851936

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA002525259A Expired - Lifetime CA2525259C (fr)	1998-05-06	1999-05-05	Poudres metalliques obtenues par reduction d'oxides au moyen de magnesium gazeux

Country Status (1)

Country	Link
CA (1)	CA2525259C (fr)

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* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN109622941A (zh) *	2018-12-28	2019-04-16	宁夏东方钽业股份有限公司	一种低氧铌粉及其制造方法

1999
- 1999-05-05 CA CA002525259A patent/CA2525259C/fr not_active Expired - Lifetime

Also Published As

Publication number	Publication date
CA2525259A1 (fr)	2000-11-16

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Date	Code	Title	Description
2005-11-21	EEER	Examination request
2019-07-08	MKEX	Expiry	Effective date: 20190506

Publication	Publication Date	Title
US6558447B1 (en)	2003-05-06	Metal powders produced by the reduction of the oxides with gaseous magnesium
EP2055412B1 (fr)	2012-08-22	Poudre de niobum ou tantale produite par la réduction des oxydes avec un metal gazeux
AU757790B2 (en)	2003-03-06	Metal powders produced by the reduction of the oxides with gaseous magnesium
WO2000067936A1 (fr)	2000-11-16	Poudres metalliques obtenues par reduction d'oxides au moyen de magnesium gazeux
CN1919508B (zh)	2015-07-08	用气态镁还原有关氧化物制备的金属粉末
AU2008246253B2 (en)	2010-06-17	Metalothermic reduction of refractory metal oxides
RU2230629C2 (ru)	2004-06-20	Металлические порошки, полученные восстановлением оксидов газообразным магнием
EP0528974B1 (fr)	1997-07-23	Procede de preparation de poudre de tantale a grande surface specifique et a faible teneur en impuretes metalliques
CA2331707C (fr)	2010-05-04	Reduction de poudre d'oxyde de nb ou de ta par metal gazeux leger ou l'un de ses hydrures
CA2525259C (fr)	2009-07-28	Poudres metalliques obtenues par reduction d'oxides au moyen de magnesium gazeux
MXPA00010861A (en)	2002-07-25	Metal powders produced by the reduction of the oxides with gaseous magnesium
US20050175496A1 (en)	2005-08-11	Method of reclaiming contaminated metal
HK1075025B (en)	2012-01-06	Niobium powder, anode produced therewith, and the anode-containing capacitor
Luidold et al.	0	Processes for Niobium Powder-a Literature Evaluation
HK1001346B (en)	1998-06-12	Method of producing high surface area low metal impurity tantalum powder