A New Synthesis Method of α-Silicon Nitride Powder-Reductive Combustion Synthesis from Silicon and Silicon Dioxide

摘要

A new synthesis method of Si_3N_4 powder with a high α-phase content, namely reductive combustion synthesis, was pioneered in the present work. Some fundamental experiments were carried out and the result indicated that the content of α-Si_3N_4 increases with the addition of SiO_2 and C, which considerably enhances the efficiency and drastically reduces the cost. The new method not only confers the advantage of carbothermal reduction and nitridation technology, but overcomes the shortcomings of a conventional combustion synthesis process.