Process for production of sintered ceramic body
US4556526A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1981 |
| Grant date | Dec 3, 1985 |
| Priority date | — |
| Expiry date | Mar 20, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/6316
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing a sintered ceramic body, which comprises heating a semi-inorganic block copolymer at a temperature of from 500.degree. to 2300.degree. C. in an environment of vacuum or inert gases, reducing gases or hydrocarbon gases, said copolymer comprising polycarbosilane blocks having a main-chain skeleton composed mainly of carbosilane units of the formula (Si--CH.sub.2) and zirconoxane units of the formula (Zr--O); and shaping the heated product, and simultaneously with, or after, the shaping of the heated product, sintering the shaped product at a temperature of from 800.degree. C. to 2300.degree. C. in an environment of vacuum or inert gases, reducing gases or hydrocarbon gases; and a sintered ceramic body consisting substantially of Si, Zr and C and optionally of O, said sintered body being composed substantially of PA0 (1) an amorphous material consisting substantially of Si, Zr and C and optionally of O, or PA0 (2) an aggregate consisting subtantially of ultrafine crystalline particles of .beta.-SiC, ZrC, a solid solution of .beta.-SiC and ZrC and ZrC.sub.1-x wherein O<x<1 and having a particle diameter of not more than 500 .ANG., or PA0 (3) a mixture of said am…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.