Kinetics of the Formation and Transformation of Alkoxy-derived Strontium Metaborate
作者:Osamu Yamaguchi、Muneaki Kamata、Kiyoshi Shimizu
DOI:10.1246/bcsj.53.1973
日期:1980.7
A new metastable SrB2O4 was formed by heating amorphous material prepared by the simultaneous hydrolysis of strontium and boron alkoxides. Crystallization isotherms were obtained by means of the Avrami equation ln(1−α)=−ktn with n=2, the activation energy being determined to be 351 kJ/mol. The kinetics of transformation of metastable into stable SrB2O4 is interpreted by the first-order equation −ln(1−α)=kt. Activation energies are 498 kJ/mol and 343 kJ/mol for initial and final stages, respectively.
通过加热同时水解锶和硼烷氧基化合物制备的无定形材料,形成了一种新的可转移 SrB2O4。通过阿夫拉米方程 ln(1-α)=-ktn (n=2)得到了结晶等温线,活化能被确定为 351 kJ/mol。一阶方程式 -ln(1-α)=ktn解释了从惰性 SrB2O4 转变为稳定 SrB2O4 的动力学过程。初始和最终阶段的活化能分别为 498 kJ/mol 和 343 kJ/mol。