Preparation of Si₃N₄ Ceramics by Low Pressure Injection Molding Method

Abstract

Green compacts of Si₃N₄ were preparated by the low pressure injection molding method. The slurries containing 15wt%, 17wt% and 20wt% organic binder by the ball mill mixing method were tested. The good green compacts were obtained from the slurries in the range of 17wt% to 20wt%. The specimen sintered at 1850°C for 3 hrs in N₂ atomosphere of 9 kgf/cm², from the slurry of 17wt%, shows a strength of 86.7 kgf/mm² and its Weibull constant is 7.2.