Compositions: ceramic – Ceramic compositions – Pore-forming
Patent
1986-05-06
1988-10-11
Anderson, Philip
Compositions: ceramic
Ceramic compositions
Pore-forming
264 44, 264 60, 264 61, 264 66, C04B 3806, C04B 3328, C04B 3800, B28B 126
Patent
active
047771534
ABSTRACT:
A process for producing porous ceramics with controlled microstructure. Colloidal suspensions of polymeric microspheres of a selected size and shape, and aluminum oxide particles are consolidated to form a compact. The compact is heated to decompose the microspheres to leave pores, and to sinter the compact, to form a porous ceramic body with a plurality of pores preferably substantially the same size and shape, where the pores are substantially spherical and are evenly distributed and noncontiguous throughout the ceramic matrix and with strength comparable to its dense state.
REFERENCES:
patent: 3792136 (1974-02-01), Schmitt
patent: 3832426 (1974-08-01), Malthouse et al.
patent: 4010242 (1977-03-01), Iler et al.
patent: 4522744 (1985-06-01), Argall et al.
Evans, A. G.; D. R. Biswas and R. M. Fulrath, "Some Effects on the Fracture of Ceramics: II, Spherical Cavities", in Journal of the American Ceramic Society, vol. 62, No. 1-2, Jan.-Feb. 1979, pp. 101-106.
Biswas, Dispak R. and Richard M. Fulrath, "Strength of Porous Polycrystalline Ceramics", in Transactions and Journal of the British Ceramic Society, vol. 79, No. 1, 1980, pp. 1-5.
Aksay Ilhan A.
Sonuparlak Birol
Anderson Philip
Washington Research Foundation
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