Low-temperature sintering of LiYO_2 doped Si_3N_4 ceramics

摘要

The microstructure of silicon nitride based ceramics can be tailored to achieve a range of useful properties for various applications. Dense bodies of Si_3N_4 are usually fabricated by using additives which react with silica to form a liquid at the sintering temperature in which silicon nitride partially dissolves [1,2]. The liquid phase promotes densification and allows the α → β transformation to take place by solution/precipitation processes. During colling, it solidifies to form an intergranular phase [3].