Thermal shock resistance ceramic insulator
Thermal shock resistant cermet insulators containing 0.1-20 volume % metal present as a dispersed phase. The insulators are prepared by a process comprising the steps of (A) providing a first solid phase mixture of a ceramic powder and a metal precursor; (B) heating the first solid phase mixture above the minimum decomposition temperature of the metal precursor for no longer than 30 minutes and to a temperature sufficiently above the decomposition temperature to cause the selective decomposition of the metal precursor to the metal to provide a second solid phase mixture comprising particles of ceramic having discrete metal particles adhering to their surfaces, said metal particles having a mean diameter no more than 1/2 the mean diameter of the ceramic particles, and (C) densifying the second solid phase mixture to provide a cermet insulator having 0.1-20 volume % metal present as a dispersed phase.
- Assignee:
- Department of Energy
- Patent Number(s):
- US 4234338
- OSTI ID:
- 6470319
- Country of Publication:
- United States
- Language:
- English
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