FR2252995A2 - Insulating ceramic having controlled porosity - prepd. by sinter process comprising final sintering without over-pressure - Google Patents

Insulating ceramic having controlled porosity - prepd. by sinter process comprising final sintering without over-pressure

Info

Publication number
FR2252995A2
FR2252995A2 FR7342852A FR7342852A FR2252995A2 FR 2252995 A2 FR2252995 A2 FR 2252995A2 FR 7342852 A FR7342852 A FR 7342852A FR 7342852 A FR7342852 A FR 7342852A FR 2252995 A2 FR2252995 A2 FR 2252995A2
Authority
FR
France
Prior art keywords
mixt
sintering
prepd
over
powder
Prior art date
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.)
Granted
Application number
FR7342852A
Other languages
French (fr)
Other versions
FR2252995B2 (en
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.)
Groupement Activities Atomiques Advancees
Original Assignee
Groupement Activities Atomiques Advancees
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.)
Filing date
Publication date
Application filed by Groupement Activities Atomiques Advancees filed Critical Groupement Activities Atomiques Advancees
Priority to FR7342852A priority Critical patent/FR2252995A2/en
Priority to CH603574A priority patent/CH588426A5/xx
Priority to AU68555/74A priority patent/AU498289B2/en
Priority to DE2422416A priority patent/DE2422416A1/en
Priority to CA199,582A priority patent/CA1028363A/en
Priority to IT2254274A priority patent/IT1022031B/en
Priority to GB2158774A priority patent/GB1438602A/en
Priority to JP49053953A priority patent/JPS5048004A/ja
Priority to NO741794A priority patent/NO143151C/en
Publication of FR2252995A2 publication Critical patent/FR2252995A2/en
Priority to US05/793,341 priority patent/US4119469A/en
Application granted granted Critical
Publication of FR2252995B2 publication Critical patent/FR2252995B2/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C04B35/486—Fine ceramics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Inorganic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

Insulating ceramics passive to molten corrosive metals, e.g. Al and steel, and resistant to repeated heat-shocks, are prepd. by (1) mixing finely powdered oxides of Gp. III and Gp. IV elements, (2) sintering pt. of powder mixt. under high temp. and press., (3) comminuting sintered matl., (4) mixing comminuted matl. with balance of powder, (5) stirring after adding 0.1-6 wt.% Gp. IA fluoride, and (6) quickly vibrating in a mould, followed by (7) sintering vibrated mixt. without over-press. for 1 to several hrs. at 850-1350 degrees C under a controlled atmos. pref. H2 or a neutral atmos. Porosity of ceramic can be increased by admixing finely powdered mixt. before sintering with >35 wt.% (w.r.t. total mixt) compact grains of Gp. III and IV oxides. Specif. grains and fine powder consists of same oxide, pref. Al2O3, have French standard screen mesh sizes 22 and 17 resp. and are sintered in air at 1350 degrees C.
FR7342852A 1973-05-18 1973-11-30 Insulating ceramic having controlled porosity - prepd. by sinter process comprising final sintering without over-pressure Granted FR2252995A2 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
FR7342852A FR2252995A2 (en) 1973-11-30 1973-11-30 Insulating ceramic having controlled porosity - prepd. by sinter process comprising final sintering without over-pressure
AU68555/74A AU498289B2 (en) 1973-05-18 1974-05-03 Porous insulating sintered ceramic substances
CH603574A CH588426A5 (en) 1973-05-18 1974-05-03
CA199,582A CA1028363A (en) 1973-05-18 1974-05-09 Controlled porosity insulating ceramics and related sintering process
DE2422416A DE2422416A1 (en) 1973-05-18 1974-05-09 INSULATING CERAMICS WITH CONTROLLED POROSITY AND SINTER MANUFACTURING PROCESS
IT2254274A IT1022031B (en) 1973-11-30 1974-05-10 INSULATING CERAMICS WITH CONTROLLED POROSITY AND THEIR PREPARATION PROCEDURE FOR SINTERING
GB2158774A GB1438602A (en) 1973-05-18 1974-05-15 Method of preparing ceramic substances by sintering
JP49053953A JPS5048004A (en) 1973-05-18 1974-05-16
NO741794A NO143151C (en) 1973-05-18 1974-05-16 PROCEDURE FOR THE MANUFACTURE OF CERAMIC INSULATION MATERIAL
US05/793,341 US4119469A (en) 1973-05-18 1977-05-03 Insulating ceramic substances having controlled porosity and the method for preparing them by sintering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7342852A FR2252995A2 (en) 1973-11-30 1973-11-30 Insulating ceramic having controlled porosity - prepd. by sinter process comprising final sintering without over-pressure

Publications (2)

Publication Number Publication Date
FR2252995A2 true FR2252995A2 (en) 1975-06-27
FR2252995B2 FR2252995B2 (en) 1980-06-20

Family

ID=9128563

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7342852A Granted FR2252995A2 (en) 1973-05-18 1973-11-30 Insulating ceramic having controlled porosity - prepd. by sinter process comprising final sintering without over-pressure

Country Status (2)

Country Link
FR (1) FR2252995A2 (en)
IT (1) IT1022031B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497684A1 (en) * 1981-01-09 1982-07-16 Aikoh Co Filtering medium for liq. - comprises sintered body of high alumina bonded with lithium fluoride or oxide
EP0191053A4 (en) * 1984-07-23 1988-04-06 Norton Co Refractory cement.
FR2686081A1 (en) * 1992-01-14 1993-07-16 Prod Cellulosiques Isolants PROCESS FOR THE MANUFACTURE OF AN INSULATING REFRACTORY MATERIAL, RIGID AND WITH HIGH OPEN POROSITY, AND MATERIAL THUS OBTAINED.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497684A1 (en) * 1981-01-09 1982-07-16 Aikoh Co Filtering medium for liq. - comprises sintered body of high alumina bonded with lithium fluoride or oxide
EP0191053A4 (en) * 1984-07-23 1988-04-06 Norton Co Refractory cement.
FR2686081A1 (en) * 1992-01-14 1993-07-16 Prod Cellulosiques Isolants PROCESS FOR THE MANUFACTURE OF AN INSULATING REFRACTORY MATERIAL, RIGID AND WITH HIGH OPEN POROSITY, AND MATERIAL THUS OBTAINED.
WO1993014045A1 (en) * 1992-01-14 1993-07-22 Produits Cellulosiques Isolants - Procelis Method for the fabrication of a refractory insulating rigid material with high open porosity, and material thus obtained

Also Published As

Publication number Publication date
IT1022031B (en) 1978-03-20
FR2252995B2 (en) 1980-06-20

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