Silicon-nitride-sintered body

Details Silicon-nitride-sintered body Silicon-nitride-sintered body

C - Chemistry, Metallurgy

04

B

261/1

C04B 35/58 (2006.01) C04B 35/584 (2006.01) C04B 35/597 (2006.01)

Patent

CA 1217506

- 13 - Abstract of the Disclosure A silicion-nitride-sintered mass whose base is prepared from si3N4-rare earth oxide-A?2O3-A?N and whose constituent phases are represented by .alpha.'-Si3N4 and .beta.-Si3N4, wherein the ratio between both phases is set at 0.05-0.7 : 0.95-0.3, or by .alpha.'-Si3N4, .beta.-Si3N4 and Si-rare earth element-A?-O-N, wherein the ratio of the .alpha. '-Si3N4 phase to the whole of all constituent phases is set at 0.01 to 0.7.

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