焼結前の窒化ケイ素粉体の物理・化学的評価

抄録

Physico-chemical properties of Si₃N₄ powders were investigated with reference to grain growth behavior. The results obtained are as follows:
(1) The heat of immersion, one of the measures for the surface activity of powder, had no connection with the grain growth.
(2) The powder having a large lattice strain showed a large heat of immersion.
(3) Migration of surface atoms occurred from ca. 1450°C, and the rearrangement of particles took place, resulting in the crystallite growth.
(4) The rate of β phase formation was independent of the β content in the original powder.