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采用X 射线衍射仪研究了高能球磨金红石型TiO2 机械力化学变化 ,并解释了机械力活化的内在机制。研究表明 :随着粉磨的进行 ,金红石型TiO2 的晶粒大小D减少、显微应变ε增加 ,有效温度系数增加 ,晶格无序化程度增强。晶粒大小D和显微应变ε成ε =17 4 98D- 0 5571 的逆变关系变化。机械力化学效应具有阶段性 ,采用晶粒尺寸、有效温度系数、显微应变三个指标可反映一种物质对机械力化学效应的敏感性
The mechanical and chemical changes of high-energy ball-milled rutile TiO2 were investigated by X-ray diffractometer, and the internal mechanism of mechanical activation was explained. The results show that as the grinding progresses, the grain size D of rutile TiO2 decreases, the micro-strain ε increases, the effective temperature coefficient increases and the disordered degree of lattice increases. The relationship between the grain size D and the micro-strain ε ε = 17 4 98D-0 5571 was analyzed. The mechanochemical chemical effect is staged. The three indexes of grain size, effective temperature coefficient and microstrain can reflect the sensitivity of a substance to the mechanochemical effect