不同粒度硅灰石的纳米TiO_2/硅灰石复合体结构及性能对比  

Contrasts of Structure and Properties of Two Nano TiO_2/Wollastonite Composites with Wollastonite Having Different Partical Sizes

作　　者：杨少凤[1] 王子忱[1] 赵敬哲[1] 薛丽晶 赵纯[1] 赵慕愚[1] 

机构地区：[1]吉林大学化学系,长春130023

出　　处：《吉林大学自然科学学报》2000年第3期73-76,共4页Acta Scientiarum Naturalium Universitatis Jilinensis

基　　金：吉林省科学技术发展规划基金 !(批准号 :990 5 43 )

摘　　要：以 32 5目和 2 0 0 0目硅灰石粉为例 ,讨论硅灰石粒度对复合体结构及性能的影响 .通过XRD,BET,DTA,EES和 TEM对复合体进行表征 .结果表明 ,2 0 0 0目的硅灰石容易获得包覆完全的产品 ,且具有相对较高的硅灰石含量 ;2 0 0 0目硅灰石与 Ti O2 的复合体由于其Ti O2 包覆层较薄而具有较好的热稳定性 .Wollastonite with partical sizes of 325 and 2 000 meshes were chosen to examine the influence of the partical size of wollastonite on the structures and the properties of their composites with TiO 2. The composites were characterized by XRD, BET, DTA, EES and TEM methods. The composite with wollastonite having smaller partical size is easy to get fully coating and has a relatively higher content of wollastonite. Amorphous TiO 2/W2000 composites have better thermal stability than TiO 2/325 composites because of their thinner film of titania. The composites can be used as a substitute for titania in some fields .

关 键 词：硅灰石 二氧化钛 复合体 热稳定性 结构 钛白粉 

分 类 号：TQ621.12[化学工程—精细化工]