CPC C04B 35/584 (2013.01) [C04B 35/6264 (2013.01); C04B 41/0054 (2013.01); C04B 41/0072 (2013.01); C04B 2235/3203 (2013.01); C04B 2235/5436 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/666 (2013.01)] | 15 Claims |
1. A silicon nitride ceramic sintered body, wherein the silicon nitride ceramic sintered body has a content of a silicon nitride crystalline phase of not less than 98 wt %, a relative density of not less than 99%, a porosity of not larger than 1%, a grain boundary phase comprising Li, 0, N, and Si elements, and a total content of C, F, Al, Mg, K, Ca, Na and rare-earth metals elements of less than 0.1 wt %.
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