Method for producing multi-component ceramics

Details Method for producing multi-component ceramics Method for producing multi-component ceramics

1989-06-09

1990-11-13

Group, Karl

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

252 629, 423598, 423619, C04B 3549, C01G

Patent

active

049701827

ABSTRACT:
Aqueous titanium tetrachloride solution, i.e., one component (X) for forming multi-component ceramic compound, and a suitable amount of zirconium oxynitrate, i.e., another component (Y) are mixed. Hydroxide coprecipitate of Ti.sup.4+ and Zr.sup.4+ containing the components is formed from the mixture solution. The coprecipitate is cleaned, dried, then calcined, for example, at 1100.degree. C., thus producing powder containing 0.32-micron particles. This powder is mixed with TiO.sub.2 and PbO, in a suitable amount to be added to the other component (Y) of the multi-component ceramic compound. The resultant mixture is calcined, for example, at 740.degree. for 1 hour, into fine powder containing 0.32-micron particles. The calcined powder is then press-molded, for example, under the pressure of 1 ton/cm.sup.2, then calcined, for example, at 1220.degree. C. for 1 hour, thereby forming multi-component ceramics.

REFERENCES:
patent: 3963630 (1976-06-01), Yonezawa et al.
patent: 4587225 (1986-05-01), Tsukuma et al.
patent: 4643984 (1987-02-01), Abe et al.
patent: 4696810 (1987-09-01), Shirasaki et al.
patent: 4812426 (1989-03-01), Takagi et al.
Journal of the American Ceramic Society, Nov. 1972, pp. 541-544, vol. 55, No. 11.

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