Si_3N_4種結晶を含むSiO_2-C-N_2系からの窒化ケイ素粉末の作製

概要

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The effects of adding a small amount of Si_3N_4 less than 0.1 mass% as seed crystals on the particle size and the α-content in resulting Si_3N_4 powders were investigated. A small quantity of only 0.02 mass% seed increased the α-content to more than 90%. This seems to be due to the high partial pressure of gaseous SiO evolved by reduction of SiO_2. The particle sizes of the products decreased as the amount of seed increased. Finer particles were obtained when a kind of seed powder produced through pulverization process was used, which can be ascribed to significantly finer particles in the seed. With addition of less than 0.1 mass% seed, the relation between the number of seed(N)and the resultant particle size(D)was confirmed to obey the equation, D=k(1/N)^<1/3> where k is a constant.
社団法人日本セラミックス協会の論文
1998-01-01