无机材料学报

• 研究论文 • 上一篇    下一篇

表面改性对氮化硅浆料固含量的影响

刘学建1; 黄莉萍1; 古宏晨2; 张兆泉1; 符锡仁1   

  1. 1. 中国科学院上海硅酸盐研究所, 上海 200050; 2. 华东理工大学技术化学物理研究所, 上海 200237
  • 收稿日期:1999-01-08 修回日期:1999-04-12 出版日期:2000-02-20 网络出版日期:2000-02-20

Effects of Surface Modification on Solid Loading of Silicon Nitride Slurries

LIU Xue-Jian1; HUANG Li-Ping1; GU Hong-Chen2; ZHANG Zhao-Quan1; FU Xi-Ren1   

  1. 1.Shanghai Institute of Ceramic; CAS; Shanghai; 200050 China; 2.East China University of Science &Technology Shanghai; 200237 China
  • Received:1999-01-08 Revised:1999-04-12 Published:2000-02-20 Online:2000-02-20

摘要: 本文通过酸洗工艺对Si粉体进行了表面改性,并研究了表面改性对粉体胶体特性及其浆料流动性的影响.结果表明:酸洗处理之后悬浮粒子的等电点升高,XPS表面分析表明这是粉体表面氧化程度降低的缘故.而且,由于酸洗处理有效地提高了粒子的Zeta电位,因而浆料的流动性明显得到改善,其最高固含量也由50vol.%提高到55vol.%,并制备出了固含量为53vol.%的、适于浇注的Si浆料.

关键词: 氮化硅, 酸洗, 表面改性, 浆料, 固含量

Abstract: Surface modification of Si3N4 particles by acid leaching and its effects on the colloidal behavior and the flow properties of Si3N4 aqueous
slurries were investigated. The experimental results indicate that the isoelectric point of Si3N4 particles shifts to basic region after
modification due to the decreasing of the oxidizing degree on the surface of Si3N4 modified. Because the Zeta potential of Si3N4
particles increases efficiently, the flow properties of Si3N4 modified slurry significantly improve and the maximum solid loading
increases from 50 to 55vol.%. Moreover, the 53vol.% Si3N4 slurry suitable for casting was prepared.

Key words: silicon nitride, acid leaching, surface modification, slurry, solid loading

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