发现正交结构的高压相β-TiO2可通过高能球磨锐钛矿TiO2而得到.高能机械球磨减小了颗粒尺寸,球磨40h后,发现样品存在2nm～4nm的类点状颗粒和10nm～35nm的类花瓣状颗粒.高能球磨改变了锐钛矿TiO2晶粒的晶格常数.该晶格畸变现象可能与晶界区行为相关.红外吸收峰随球磨而先"蓝移"后"红移".该"蓝移"与"红移"与晶格常数a的变化紧密相关.另外发现随着球磨时间增长,TiO2的光催化效果变差.
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