Process for producing ceramic sintered bodies

Details Process for producing ceramic sintered bodies Process for producing ceramic sintered bodies

1979-01-23

1981-02-03

Parrish, John

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 65, C04B 3558

Patent

active

042488141

ABSTRACT:
A process for producing a heat-resistant ceramic sintered body, which comses preparing polycarbosilane partly containing siloxane bonds by adding 0.01 to 15% by weight of polyborosiloxane containing phenyl groups in at least a part of the side chains of Si and having a skeletal structure composed of B, Si and O to a polysilane having the structure ##STR1## wherein n is at least 3, and R.sub.1 and R.sub.2, independently from each other, represent methyl, ethyl, phenyl or hydrogen, and heating the polymer mixture in an atmosphere inert to the reaction thereby polymerizing it; mixing said polycarbosilane with a ceramic powder composed of at least one member selected from the group consisting of oxides, carbides, nitrides, borides and silicides; shaping the resulting mixture; and simultaneously with, or after, the shaping of the mixture, sintering the mixture at a temperature of from 800.degree. C. to 2,000.degree. C. in vacuum or in an atmosphere composed of at least one gas selected from the group consisting of inert gases, carbon monoxide gas, carbon dioxide gas, hydrogen gas, nitrogen gas and hydrocarbon gases.

REFERENCES:
patent: 3520656 (1970-07-01), Meadows
patent: 4110386 (1978-08-01), Yajima et al.
patent: 4112139 (1978-10-01), Yajima et al.
patent: 4117057 (1978-09-01), Yajima et al.

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