无机材料学报

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SiC/纳米TiN水基复合料浆特性及喷雾干燥

郭兴忠1, 李海淼1, 朱潇怡1, 杨 辉1, 傅培鑫2, 高黎华2   

  1. 1. 浙江大学材料科学与工程系, 杭州 310027; 2. 浙江东新密封有限公司, 乐清 325604
  • 收稿日期:2007-12-10 修回日期:2008-02-22 出版日期:2008-11-20 网络出版日期:2008-11-20

Characteristics of SiC/nano-TiN Aqueous Mixed Slurry and Its Spray Drying Behavior

GUO Xing-Zhong1, LI Hai-Miao1, ZHU Xiao-Yi2, YANG Hui1, FU Pei-Xin2, GAO Li-Hua1   

  1. 1. Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China; 2. Zhejiang Dongxin Seals Limited Company, Yueqing 325604, China
  • Received:2007-12-10 Revised:2008-02-22 Published:2008-11-20 Online:2008-11-20

摘要: 以四甲基氢氧化铵(TMAH)为分散剂, 纳米TiN、亚微米SiC粉体为原料, 分别制备单组分水基料浆及复合料浆, 分析了SiC/纳米TiN复合料浆的分散稳定机制以及喷雾干燥行为. 研究结果表明, TMAH在纳米TiN、SiC颗粒表面形成特征吸附, 通过静电作用和空间位阻协同作用提高颗粒的分散性; 当pH=8、TMAH加入量为0.75wt%时, 复合浆料分散稳定, 喷雾干燥制备的SiC/纳米TiN复合粉体流动性好, 且分布均匀.

关键词: SiC, 纳米TiN, 水基料浆, 复合粉体, TMAH, 喷雾干燥

Abstract: The aqueous slurries were prepared usingtetramethyl ammonium hydroxide (TMAH) as dispersant, nano-TiN and submicron SiC
powders as starting materials. The dispersion, stabilization mechanism and spray drying behaviors of SiC/nano-TiN aqueous mixed slurry were analyzed. The results show that TMAH can be absorbed on the surface of nano-TiN and SiC particles, and the dispersibility of particles is cooperatively improved by electrostatic and steric effects. The mixed slurry possesses better dispersion and stabilization when pH value is 8 and the amount of TMAH is 0.75wt%, and the SiC/nano-TiN composite powders prepared by spray drying distribute uniformly with good fluidity.

Key words: silicon carbide, nano-TiN, aqueous slurry, composite powders, TMAH, spray drying

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