摘要
为了研究研磨作用方式对粉碎样品的粒径和晶型转变的影响,以汽车颜料TiO2为原料,分别用离心环隙式磨机和QM-BP型行星式球磨机对质量分数为30%的TiO2进行了湿法超细粉碎试验。XRD分析结果表明:离心环隙式磨机粉磨6h,近90%的锐钛矿型TiO2转变成金红石型TiO2,且粒径达到22.9nm。而行星球磨机粉磨20h,其粒径仅达到86.5nm,且无晶型转变。研究结果表明:新型机的特殊研磨方式不仅能够获得纳米级的颗粒,而且通过机械力化学效应使TiO2的相变温度从900℃降到100℃以下。
In order to study the performance of milling manners on sample particle size and polymdrphic transformation,30 wt% TiO_2 was performed moist comminution experiment by planetary ball-mill and novel ultrafine mill respectirvely with TiO_2 of automobile pigment as experimental material. XRD analysis shows that nearly 90% anatase TiO_2 transformed to rutile TiO_2 after 6 h milling by novel mill, and the particle reached size of 22.9 nm. But the particle size only reached 86.5 nm after 20 h milling by planetary ball-mill, and no polymorphic transformation was found. The results indicate that the special milling mechanism can not only obtain the nano-scale powders but also decrease polymorphic transformation temperature of TiO_2 from 900 ℃ to below 100 ℃ by means of mechanochemistry effect.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2005年第4期348-352,共5页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金资助项目(40172020)
关键词
材料合成与加工工艺
纳米金红石
超细粉碎
相变
XRD
SEM
机械力化学
material synthesis and processing technology
nano-rutile
ultrafine milling
phase transformation
XRD
SEM
mechanochemistry
