Method of manufacturing ceramic sintered bodies

Details Method of manufacturing ceramic sintered bodies Method of manufacturing ceramic sintered bodies

1985-04-08

1986-07-01

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

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

264 61, 264125, 264332, 501 1, 501135, 501136, 501138, C04B 3546

Patent

active

045980551

ABSTRACT:
A method of manufacturing ceramic sintered bodies. A basic starting material corresponding to the sintered body is mixed with compounds which form a melting phase with the starting material during sintering. Prior to the sintering, presintered starting material nuclei having an average crystallite size which corresponds at least three times the average crystallite size of the basic starting material are added to the basic material and melt-forming compounds. The nuclei are added in a quantity of at least 0.1% by weight of the starting material to be sintered. By this addition the grain size and grain distribution in the ceramic sintered body of materials with discontinuous grain growth can be effectively checked and controlled.

REFERENCES:
patent: 2966420 (1960-12-01), Prokopowicz et al.
patent: 3523028 (1970-08-01), Prokopowicz
patent: 4054627 (1977-10-01), Ownby
patent: 4417227 (1983-11-01), Hennings
Hennings, D. "Recrystallization of Barium Titanate Ceramics," Science of Ceramics, vol 12, pp. 405-409 (1984).
Schmelz, H. "Anomalous Grain Growth in BaTiO.sub.3 Ceramics," Science of Ceramics, vol. 12, pp. 341-347 (1984).

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