Plastic and nonmetallic article shaping or treating: processes – Outside of mold sintering or vitrifying of shaped inorganic... – Utilizing sol or gel
Patent
1997-05-06
1999-08-03
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Outside of mold sintering or vitrifying of shaped inorganic...
Utilizing sol or gel
501 12, 501128, 264640, 264643, 2105101, C04B 35185
Patent
active
059321687
ABSTRACT:
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.
REFERENCES:
patent: 4687652 (1987-08-01), Yoldas et al.
patent: 4761323 (1988-08-01), Muhlratzer et al.
patent: 4849382 (1989-07-01), Shibata et al.
patent: 5030592 (1991-07-01), Komarneni et al.
patent: 5045514 (1991-09-01), Ismail et al.
patent: 5130110 (1992-07-01), Rouet et al.
patent: 5204141 (1993-04-01), Roberts
patent: 5268101 (1993-12-01), Anderson et al.
patent: 5338707 (1994-08-01), Inui et al.
patent: 5439624 (1995-08-01), Anderson et al.
patent: 5733176 (1998-03-01), Robinson
M.A. Alvin, T.E. Lippert and J.E. Lane, Assessment of Porous Ceramic Materials for Hot Gas Filtration Applications, Ceramic Bulletin, 70(9), 1991, p. 1491.
M.D. Sacks & H-W Lee, A Review of Powder Preparation Methods and Densification Procedures for Fabricating High Density Mullite, appearing in Mullite and Mullite.
R.K. Iler, The Chemistry of Silica (John Wiley & Sons 1979); B.E. Yoldas, Ceramic Bulletin, 54(3), 1975, 286-88 & 289-290.
C.J. Brinker & G.W. Scherer, Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing, pp. 216-223 (Academic Press, Inc. 1990).
Derrington James
Siemens Westinghouse Power Corporation
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