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-pressureInfo
- 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
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
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- 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
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.
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 |
NO741794A NO143151C (en) | 1973-05-18 | 1974-05-16 | PROCEDURE FOR THE MANUFACTURE OF CERAMIC INSULATION MATERIAL |
JP49053953A JPS5048004A (en) | 1973-05-18 | 1974-05-16 | |
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)
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 |
EP0191053A1 (en) * | 1984-07-23 | 1986-08-20 | Norton Company | 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. |
-
1973
- 1973-11-30 FR FR7342852A patent/FR2252995A2/en active Granted
-
1974
- 1974-05-10 IT IT2254274A patent/IT1022031B/en active
Cited By (5)
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 |
EP0191053A1 (en) * | 1984-07-23 | 1986-08-20 | Norton Company | Refractory cement |
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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