WU Qingwen ¹, HU Feng ¹, XIE Zhipeng ²
(1. Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi,China;
2. School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China)

Abstract: Silicon nitride is a kind of structural ceramics with a great application prospect. With their excellent mechanical properties (highbending strength and hardness), high resistance to wear and corrosion and high temperature, high theoretical value of thermal conductivity.silicon nitride ceramics are widely used in modern industry and manufacturing. This paper discusses the preparation process of silicon nitride from the perspectives of its raw materials, sintering additives and sintering method and then introduces its applications in ceramic bearing and high thermal conductive electronic packaging substrate.

Key words: silicon nitride; preparation techniques; application progress