Back to results
US 4,289,720 AGranted
Process for producing a thermal-resistant ceramic fired body
AssigneeThe Foundation: The Research Institute for Special Inorganic Materials
InventorsSeishi Yajima, Toetsu Shishido, Kiyohito Okamura, Hideo Kayano, Josaburo Hayashi, Hiroshi Kobayashi
Life of this patent
Estimating the term…
Abstract
A process for producing a thermal-resistant ceramic fired body is disclos As an additive for ceramic powder is used at least one specified organosilicon polymer selected from the group consisting of [I] organopolysiloxanes, [II] organosiloxane copolymers, [III] polycarbosiloxanes and [IV] nitrogen-containing organosilicon polymers.
Claims5
A process for producing a thermalresistant ceramic fired body, which comprises adding an organosilicon polymer having the following structural formula:
- ##STR34## wherein R.sub.1 and R.sub.2 are the same or different and represent an alkyl group having a carbon number of not more than 4, or a phenyl group, R.sub.4 represents a hydrogen atom, a trimethylsilyl group, or a triphenylsilyl group, and n is less than 10,000, as an additive to at least one ceramic powder selected from the group consisting of oxides, carbides, nitrides, borides and silicides;
- molding the resulting mixture in a desired form;
- and then firing the molded body at a temperature of 800.degree. to 2000.degree. C. under vacuum or in at least one atmosphere selected from the group consisting of inert gas, carbon monoxide gas, carbon dioxide gas, nitrogen gas and hydrocarbon gas.
Dependencies are inferred from the claim text.