Synthesis and processing of monosized oxide powders

Details Synthesis and processing of monosized oxide powders Synthesis and processing of monosized oxide powders

1983-12-23

1985-09-24

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

264 56, 423593, 423608, 423622, 501 94, 501103, 501105, 501152, 501134, 501135, C04B 3500, C04B 3546

Patent

active

045433410

ABSTRACT:
Uniform-size, high-purity, spherical oxide powders are formed by hydrolysis of alkoxide precursors in dilute alcoholic solutions. Under controlled conditions (concentrations of 0.03 to 0.2 M alkoxide and 0.2 to 1.5 M water, for example) oxide particles on the order of about 0.05 to 0.7 micron can be produced. Methods of doping such powders and forming sinterable compacts are also disclosed.

REFERENCES:
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patent: 4365011 (1982-12-01), Bernard et al.
patent: 4372865 (1983-02-01), Yu et al.
patent: 4459245 (1984-07-01), Ryon et al.
Mazdiyasni, K. S. et al.--Preparation of Ultra-High-Purity Submicron Refractory Oxides--J. of Am. Cer. Soc. (1965), pp. 372-375.
Sakka, S.-"Gel Method for Making Glass", Treatise on Materials Science and Technology, vol. 22, Jul. 8, 1982, pub. by Academic Press Inc., N.Y.C., pp. 129-136, 159-160, 164-167.
Barringer, E. A. et al., "Formation, Packing and Sintering of Monodisperse TiO.sub.2 Powders"--J. Am. Ceram. Soc., 65 (12), Dec. 1982, C199-C201.

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