表面活性剂对Si3N4注射成型的影响

The Effects of Surfactants on CIM of Si3N4

摘要:

就硬脂酸（SA）及硅烷KH570两种不同的表面活性剂对注射成型各阶段的影响进行了研究。实验证明：硬脂酸在降低原始粉料混合粘度时所起的作用明显；硅烷KH570在降低经过表面氧化处理的Si3N4粉料混合粘度时作用效果明显；不同表面活性剂及不同用量对脱脂效果影响不大；但随着表面活性剂用量增加，烧结体密度逐渐减少，同样硬度也逐渐减少。但当溶剂脱脂应用于脱脂阶段时，烧结体性质在密度、硬度方面都有所提高，表面活性剂的影响不再呈明显的规律性。

Abstract:

The effects of silane KH570 and stearic acid on ceramic injection molding for different stages were studied and analyzed in this article. Results show that stearic acid can play an effective part in reducing viscosity of as-received Si3N4 powder system and silane KH570 can play an important part in oxidized Si3N4 powder system. Debinding value was not affected by surfactants and its dosages, but the density and hardness of sintering body were reduced with the increasing of surfactants content. Density and hardness of sintering body could be improved when solvent debinding process was applied.