Silicon nitride-alumina composite ceramics and producing method

Details Silicon nitride-alumina composite ceramics and producing method Silicon nitride-alumina composite ceramics and producing method

1987-02-11

1989-07-04

Howard, Jacqueline V.

Compositions: ceramic

Ceramic compositions

Refractory

501 98, C04B 3558

Patent

active

048450618

ABSTRACT:
Silicon nitride-alumina composite ceramics composed of silicon nitride crystals, .alpha.-alumina crystals and .beta.'-sialon crystals, wherein the silicon nitride crystals and the .beta.'-sialon surrounded the .alpha.-alumina crystals so as to prevent the connection of the .alpha.-alumina crystals. And a method for producing the silicon nitride-alumina composite ceramics which has the steps of preparing a mixture powder composed of 20 to 70 wt % of alumina powder and silicon nitride powder as a remainder, the average particle diameter of the alumina powder being two or more times as large as that of the silicon nitride powder, and firing the mixture powder in an atmosphere of inactive gas.

REFERENCES:
patent: 3903230 (1975-09-01), Kamigaito et al.
patent: 3953221 (1976-04-01), Lange
patent: 4357526 (1982-11-01), Yamamoto et al.
patent: 4475029 (1984-10-01), Yoshida et al.
patent: 4486651 (1984-12-01), Atsumi et al.
patent: 4499366 (1985-02-01), Yoshida et al.
patent: 4556780 (1985-12-01), Atsumi et al.
patent: 4598676 (1986-07-01), Ito et al.
patent: 4613455 (1986-09-01), Suzuki et al.
patent: 4633064 (1986-12-01), Atsumi et al.
patent: 4634837 (1987-01-01), Ito et al.
patent: 4644133 (1987-02-01), Atsumi et al.
Hoch et al, "Preparation and Characterization of Ultrafine Powders of Refractory Nitrides:", Sialon; Ceramic Bulletin; vol. 58, No. 2 (1979).
75/2543 Special Ceramics; Lange; "Fabrication & Properties of Silicon Compounds".

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