研究了纳米TiO2粒子热处理过程的晶粒生长,结果表明:低于823K锐钛矿晶粒的长大速率较小,823K后锐钛矿晶粒的长大速率显著增加.锐钛矿晶粒的生长动力学符合五次方方程,表观生长活化能由于纳米尺寸和相变效应的影响在高温区和低温区表现不同,高于823K时为(201.55±5.62)kJ/mol,低于823K时为(38.67士6.37)kJ/mol;金红石晶粒的生长符合二次方方程,表观生长活化能为(108.72±5.06)kJ/mo1.
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