The reaction of dichlorosilane, H2SiCl2, with gaseous NH3 in dichloromethane or diethyl ether solution results in the formation of a silazane oil containing silicon, hydrogen, and nitrogen in good yield. This ammonolysis product can be pyrolyzed in an N2 atmosphere (temperature to 1150°C) to give α‐Si3N4 in ∼70% yield. The ceramic product formed has a relatively porous, fine‐grained microstructure with some cracks and blisters.
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