热历史对SrO-Al_2O_3-SiO_2系玻璃析晶动力学的影响  

The effect of thermal history on the crystallization kinetics of SrO-Al_2O_3-SiO_2 system glass

作　　者：匡敬忠[1] 

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《功能材料》2011年第8期1390-1394,1398,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50864006);江西省自然科学基金资助项目(2008GZC0034)

摘　　要：以SrO-Al2O3-SiO2系玻璃为研究对象,采用Ozawa方程、Kissinger方程和JMA修正方程研究了热历史对玻璃析晶动力学的影响。结果发现化学组成相同的玻璃,热历史对其析晶活化能E、Avrami指数n和析晶速率指前因子υ影响较明显,采用不同的计算方法得到的结果存在不同程度的差异。通过玻璃析晶试验发现热历史对微晶玻璃主次晶相的析出没有影响,热历史对析晶活化能的影响主要来源于析出主次晶相的比例不同。SrO-Al2O3-SiO2 system glass were investigated.The effect of the thermal history on the transformation kinetics of glass was studied using Ozawa equation,Kissinger equation and the correctional equation JMA.The results showed that for the glass with the same chemical composition,the activation energy of crystallization E,Avrami exponent（n） and the pre-exponential factor of crystallization rate（υ） were distinctly influenced by the thermal history.The results,which were calculated by different methods,were some difference.The experiment of glass crystallization showed that the primary and secondary crystal phase of glass ceramics was not influenced by the thermal history.The effect of thermal history on the crystallization activation energy existed because of the different proportion of the primary and secondary crystal phase precipitated.

关 键 词：热历史 析晶活化能 Avrami指数n 析晶速率指前因子υ 锶铝硅玻璃 

分 类 号：TQ171.1[化学工程—玻璃工业]