SiO_2-TiO_2复合微粒的研究  

STUDY ON SiO_2-TiO_2 COMPOSITE PARTICLE

作　　者：喻志刚[1] 袁荞龙[1] 应圣康[1] 

机构地区：[1]华东理工大学材料科学研究所,289信箱上海200237

出　　处：《复合材料学报》2000年第4期71-75,共5页Acta Materiae Compositae Sinica

摘　　要：通过溶胶法制备了 18nm和 40 nm两种粒径均匀、单分散的 Si O2 - Ti O2 复合微粒 ,确定了最佳合成条件。电镜照片显示 ,水和 Ti O2 粒子接枝于 Si O2 粒子表面 ,成针状向外生长。对包覆过程、复合纳米粉末煅烧行为、表面改性的研究表明 ,110 0℃～ 12 0 0℃ Ti O2 由锐钛型向金红石型转变 ,Si O2 的鳞石英晶型也开始形成。甲醇改性的 TS纳米粉末能较好的再分散于乙醇中。Two kinds of monodispersed SiO 2 TiO 2 composite particles with the uniform diameter of 18 nanometers and 40 nanometers separately were prepared by sol technology,and the best synthesis condition was also determined. Electron microscope revealed that the hydrated TiO 2 particle had been grafted onto the surface of SiO 2 particle, growing outside in a needle shape. Study on the covering process,the calcination behavior of the composite ultrafine powder and the surface modification displayed that the crystal form of TiO 2 transformed from anatase to rutile at 1100℃~1200℃, the o tridymite form of SiO 2 came into being in the same condition and the SiO 2 TiO 2 ultrafine powder modified by methanol could be redispersed well in ethanol.

关 键 词：复合微粒 溶胶 二氧化硅 二氧化钛 颜料 制备 

分 类 号：TQ621.12[化学工程—精细化工] TB332[一般工业技术—材料科学与工程]