Aluminum oxide ceramics having improved mechanical properties

Details Aluminum oxide ceramics having improved mechanical properties Aluminum oxide ceramics having improved mechanical properties

C - Chemistry, Metallurgy

04

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261/1

C04B 37/04 (2006.01) C03C 14/00 (2006.01) C04B 35/10 (2006.01) C04B 35/111 (2006.01) C04B 35/58 (2006.01) C04B 35/64 (2006.01) C04B 35/65 (2006.01)

Patent

CA 2020486

ABSTRACT A wear-resistant alumina material is disclosed, as is its preparation by liquid phase sintering a mixture of about 70 to 95 percent by weight of crystalline Al2O3 particles and about 30 to 5 percent by weight of glass phase-forming components in a nitrogenizing atmosphere from which oxygen is substantially excluded. Generally, the resulting material has a 5 Kg Vickers hardness which is at least about 5 percent greater than the hardness of a corresponding alumina material sintered in air.

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