Influence of rare earth oxides on the non-isothermal crystallization of phosphosilicate melts during cooling
Influence of rare earth oxides on the non-isothermal crystallization of phosphosilicate melts during cooling
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DOI：
10.1016/j.jnoncrysol.2013.11.009
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发表时间：
2014-02
影响因子：
3.5
通讯作者：
Shujiang Liu;Z. Shan;G. Fu;Y. Yue
中科院分区：
文献类型：
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作者：
Shujiang Liu;Z. Shan;G. Fu;Y. Yue
本文报道了yb2o3和er2o3对磷硅酸盐熔体非等温结晶影响的详细量热研究。结果表明：在冷却过程中，Yb3 +/Er3 +离子促进了zn2sio4晶体的形成，抑制了na3po4和alpo4的形成；非等温熔体结晶动力学可以用Avrami模型很好地描述。用弗里德曼微分等换算法测定了未掺杂和共掺杂Yb3 +/Er3 +样品在冷却过程中的结晶活化能。在冷却过程中，两种玻璃的结晶度均随结晶度的减小而减小（θ= 0.1 ~ 0.9），而引入yb2o3和er2o3导致冷却时结晶能垒的增加。
We report a detailed calorimetric study concerning the influence of Yb2O3and Er2O3on the non-isothermal crystallization in phosphosilicate melts. The results show that Yb3 +/Er3 +ions promote the Zn2SiO4crystal formation, but suppress the Na3PO4and AlPO4formation during cooling. The non-isothermal melt-crystallization kinetics can be well described by the Avrami model. The activation energyEeof crystallization in both the undoped and Yb3 +/Er3 +codoped samples during cooling is determined using the differential iso-conversional method of Friedman. TheEevalue decreases with crystallinity (θ= 0.1 to 0.9) during cooling for both glasses, and introducing Yb2O3and Er2O3leads to an increase in energy barrier of crystallization upon cooling.