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1. (WO1997016393) ECOLOGICALLY COMPATIBLE WATER-BASED MULLITE SOLS, MULLITE COMPOSITIONS AND METHODS OF MAKING THE SAME
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/016393 International Application No.: PCT/US1996/015409
Publication Date: 09.05.1997 International Filing Date: 26.09.1996
Chapter 2 Demand Filed: 23.05.1997
IPC:
B01D 53/02 (2006.01) ,C04B 35/185 (2006.01) ,C04B 35/624 (2006.01) ,C04B 35/80 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
53
Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
02
by adsorption, e.g. preparative gas chromatography
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
35
Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
01
based on oxides
16
based on silicates other than clay
18
rich in aluminium oxide
185
Mullite
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
35
Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
622
Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
624
Sol-gel processing
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
35
Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
71
Ceramic products containing macroscopic reinforcing agents
78
containing non-metallic materials
80
Fibres, filaments, whiskers, platelets, or the like
Applicants:
WESTINGHOUSE ELECTRIC CORPORATION [US/US]; 11 Stanwix Street Pittsburgh, PA 15222, US
Inventors:
SU, Wei-Fang, A.; US
Agent:
PANIAN, Michael, G. ; Westinghouse Electric Corporation 11 Stanwix Street Pittsburgh, PA 15222, US
Priority Data:
08/551,49401.11.1995US
Title (EN) ECOLOGICALLY COMPATIBLE WATER-BASED MULLITE SOLS, MULLITE COMPOSITIONS AND METHODS OF MAKING THE SAME
(FR) SOLS DE MULLITE A BASE AQUEUSE ECOLOGIQUEMENT COMPATIBLES, COMPOSITIONS DE MULLITE ET LEURS PROCEDES DE FABRICATION
Abstract:
(EN) This invention relates to novel ecologically compatible water-based stable mullite precursor sols, mullite composites, and methods for making the same. The mullite precursor sols are synthesized using tetraethoxysilane and aluminum nitrate in water. The tetraethoxysilane is hydrolyzed with water and ammonium hydroxide catalyst to make a silica sol, which is then quenched with an aqueous solution of aluminum nitrate. The mullite precursor sols of the invention may be used to make highly densified ceramic composites.
(FR) Cette invention se rapporte à de nouveaux sols précurseurs de mullite, stables, à base aqueuse, compatibles du point de vue écologique, à des composites de mullite et à leurs procédés de fabrication. Les sols précurseurs de mullite sont synthétisés au moyen de tétraéthoxysilane et de nitrate d'aluminium dans l'eau. Le tétraéthoxysilane est hydrolysé avec de l'eau et un catalyseur d'hydroxyde d'ammonium pour obtenir un sol de silice qui est ensuite refroidi brusquement avec une solution aqueuse de nitrate d'aluminium. Les sols précurseurs de mullite de l'invention peuvent être utilisés pour obtenir des matériaux composites céramiques hautement densifiés.
Designated States: CA, JP, KR
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0858437JPH11514625 CA2236477KR1019990067239