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.
The aqueous slurries were prepared using tetramethyl 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.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第6期1211-1215,共5页
Journal of Inorganic Materials
基金
高等学校博士点基金(20070335017)
浙江省重大科技攻关项目(2006C11184)
