结晶度是表征玻璃析晶程度的重要参数,利用结晶度来研究析晶机理是本文的一个尝试.文中从Avrami和Arrhenian理论推出结晶度与析晶参数的关系式(1/n)1n(-1n(1-x))=1nk0-E/RT+ht,结合试验数据,得到在810～980℃,nE为17.42kJ/mol,而在710～810℃温度段nE为125.44kJ/mol.研究结果表明:Johnson-Mehl-Avrami公式中的活化能E应包括玻璃和晶相之间的界面能和晶体和玻璃相结构中原子的自由能差,而不同温度段玻璃转变成晶相所需能量是不同的,仅以J-M-A结论中的整体活化能E分析玻璃在整个热处理过程中的析晶机理是不完全的.
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