Magnesia partially-stabilized zirconia

Details Magnesia partially-stabilized zirconia Magnesia partially-stabilized zirconia

C - Chemistry, Metallurgy

04

B

261/27

C04B 35/48 (2006.01) C04B 35/486 (2006.01)

Patent

CA 1272491

MAGNESIA PARTIALLY-STABILIZED ZIRCONIA Abstract of the Invention 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 at cooling back to room temperature at specified rates and which incorporates a thermal aging step at 1000-1200°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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