cara kerja silicon nitride ceramic ring featuring
A silicon nitride sintered body, e.g., a ball, exhibiting excellent machinability is disclosed, having an X-ray diffraction profile measured on a cross section of the silicon nitride sintered body by means of a diffractometer such that Xβ/(Xα+Xβ) is 0.9−1, wherein Xα is the highest peak intensity associated with a silicon nitride …
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