Analysis of crystallization behavior in Li2O · 2SiO2 glass by DTA method based on a liquid model
Analysis of crystallization behavior in Li2O · 2SiO2 glass by DTA method based on a liquid model
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基于液体模型的DTA法分析Li2O·2SiO2玻璃的结晶行为
DOI：
10.1016/0022-3093(95)00570-6
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发表时间：
1996
影响因子：
3.5
通讯作者：
J. Fukunaga
中科院分区：
文献类型：
--
作者：
N. Mishima;R. Ota;T. Wakasugi;J. Fukunaga
采用差热分析（DTA）分析了不同熔融历史的Li2O·2sio2玻璃样品的结晶行为。将淬火后的玻璃在1300℃或1035℃下重熔1 h制备玻璃样品，发现低温熔融后的玻璃比高温熔融后的玻璃更早结晶，且结晶峰温度TC更低。测量了与DTA相同热处理条件下玻璃中析出晶体的数量、密度和大小，发现低温熔融玻璃中析出晶体的数量和大小都大于高温熔融玻璃。这些结果与液体模型一致，即晶体胚胎保存在熔体中，甚至高于液体，它们的分布取决于温度。
The crystallization behavior of Li2O · 2SiO2glass samples having different melting histories were analyzed by differential thermal analysis (DTA). The glass samples were prepared by remelting a quenched glass at 1300°C or 1035°C for 1 h. The glass melted at low temperature was found to crystallize earlier and to have lower crystallization peak temperature, TC, than that melted at high temperature. The number density and sizes of crystals precipitated in glasses with the same heat treatment as the DTA run were measured and were found greater in number and larger in the glass melted at lower temperature compared with that at higher temperature. These results are in agreement with the liquid model that crystal embryos are preserved in melts even above liquids and their distribution depends on temperature.