Silicon nitride ceramic sintered bodies

Details Silicon nitride ceramic sintered bodies Silicon nitride ceramic sintered bodies

1990-01-24

1991-05-21

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 97, 501104, C04B 3558

Patent

active

050175319

ABSTRACT:
High density fine ceramic sintered bodies are disclosed, which have a maximum pore diameter of not more than 10 .mu.m and a porosity of not more than 0.5%. A process for producing such high density fine ceramic sintered bodies comprises the steps of mixing a ceramic raw material powder with a sintering aid, grinding the resultant, mixture granulating and shaping the mixture, and firing the shaped body. The granulated powder is once forcedly dried, and upon necessity is added with water and/or sieved to obtain a uniform granulated powder having a given amount of water.

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patent: 4769350 (1988-09-01), Nishioka et al.
patent: 4801565 (1989-01-01), Matsui

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