Compositions: ceramic – Ceramic compositions – Refractory
501103, 264 65, C04B 3548
Magnesia partially-stabilized zirconia ceramic materials can be prepared from "unpurified" zirconia which contains at least about 0.05 weight percent silica. Despite the relatively high silica content, a thermal shock resistant material can be produced by a firing schedule which includes heating to a top temperature at a specified rate and cooling back to room temperature at specified rates and which incorporates a thermal aging step at 1000-1200.degree. C. Differences in microstructure and monoclinic zirconia content, with consequent differences in physical properties of the ceramic material, can be attained by variations in the firing and thermal-aging schedules.
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Bush Edward A.
Reddy K. Pattabhirami
Socha, Jr. Louis S.
Dixon Jr. William R.
Levin Gary H.
Norris Norman L.
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