机械力化学法制备超细钛酸镁粉体  

Preparation of ultra-fine magnesium titanate powder by mechanochemical method

作　　者：王加芳[1] 罗驹华[2] 李杰[3] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]盐城工学院江苏省生态环境材料重点建设实验室 [3]淄博职业学院化学工程系,江苏南京210009

出　　处：《无机盐工业》2008年第6期23-26,共4页Inorganic Chemicals Industry

基　　金：江苏省科技厅自然科学基金资助项目(BK2006062)

摘　　要：以碱式碳酸镁、二氧化钛为原料,采用机械力化学法合成超细钛酸镁粉体。采用X射线衍射仪、扫描电镜、激光粒度分析仪、差热分析仪等对材料在制备过程中的晶粒形貌、固态相变和热稳定性进行了分析。结果表明：随着球磨过程的进行,物料很快细化,球磨30 h后,粉体粒径在2～5μm。高能球磨破坏了粉体的晶体结构,随着球磨时间的增加,混合物粉体的比表面积增加,球磨时间达到30 h时,粉体呈现无定形状态,粉体经热处理结晶生成钛酸镁,结晶温度大大降低,由1000℃降到700℃。Ultra -fine magnesium titanate powder was prepared by mechanochemical method with basic magnesium carbonate and titanium oxide as raw materials. The material＇s crystal topography, solid phase transformation and thermal stability during the preparation were investigated by scanning electron microscope, X - ray diffraction, laser particle size analyzer and differential thermal analysis. Results showed that with the ball - milling the particles of the mixture powder became smaller rapidly, homogeneous powders with the size of 2 - 5 μm were obtained after ball - milled 30 h. The crystal structure of mixture had been destroyed by high energy grinding. Along with the rising of grinding time the specific surface area of the mixture increases. After ball - milled 30 h, the mixture transferred into amorphous and single phase MgTiO3 crystal was obtained after heat treatment. The synthesis temperature of MgTiO3 had been lowered from 1 000 ℃ to 700 ℃ because of the grinding mill.

关 键 词：钛酸镁 机械力化学 碱式碳酸镁 

分 类 号：TQ134.11[化学工程—无机化工]