Process for the preparation of LAS ceramic sintered bodies

Details Process for the preparation of LAS ceramic sintered bodies Process for the preparation of LAS ceramic sintered bodies

1993-05-11

1994-06-14

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

501 3, 501 7, 501 12, 501151, C04B 3518

Patent

active

053207920

ABSTRACT:
Disclosed is a process for preparing Li.sub.2 O--Al.sub.2 O.sub.3 --SiO.sub.2 ceramic sintered bodies. Lithium fluoride powder is added to a calcined Li.sub.2 O--Al.sub.2 O.sub.3 --SiO.sub.2 powder prepared by sol-gel process as sintering agent. The resulting powder mixture is compressed into a molded article and sintered at a temperature of 950.degree.-1250.degree. C. to obtain the sintered bodies of the invention. The sintered bodies according to the present invention have a relative density of 97.9% and a thermal expansion coefficient of 10.sup.-7 /.degree.C. magnitude.

REFERENCES:
patent: H626 (1989-04-01), Covino
patent: 5147829 (1992-09-01), Hench
patent: 5232877 (1993-08-01), Larnac
Hidehiko Kobayashi, et al, "Preparation of .beta.-Spodumene Powder by Sol-Gel Process and Properties of Sintered Bodies" (Department of Applied Chemistry, Faculty of Engineering, Saitama University, 255, Shimo-ohkubo, Urawa-shi 338 *Research and Development Division, Chichibu Cement Co., Ltd., 5310, Mikajiri, Kumagaya-shi, 360)-pp. 703-708.

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