【作者】 李华新； 陈玮； 罗澜；

【Author】 Huaxin Li Wei Chen Lan Luo Shanghai Institute of Ceramics,Chinese Academy of Sciences,1295 Dingxi Road,Shanghai 200050,P.R.China

【机构】 中国科学院上海硅酸盐研究所；

【摘要】 本文运用DTA、XRD 等分析手段,对摩尔比为（100-x）[0.33B₂O₃-0.67ZnO]-xV₂O₅,其中x=0,5,10,15,20,的五个低熔点玻璃的析晶过程进行了研究。研究结果发现,这五个玻璃在热处理过程中析出的晶相相继为Zn₃（BO₃）₂,Zn₂V₂O₇和ZnB₂O₄。随着V₂O₅含量的增加,玻璃网络连接强度被削弱,玻璃的T_g 温度,每种晶相对应的析晶峰（T_p）和熔化峰温度（T_m）都明显出现向低温移动的趋势。V₂O₅的引入还使得Zn₃（BO₃）₂所对应的析晶峰强度随着V₂O₅含量的不断增加而逐渐减弱,在x≥15的玻璃析出晶相中没有发现Zn₃（BO₃）₂的存在;同时在x≥10玻璃析出的晶相中发现了Zn₂V₂O₇晶相。根据DTA 分析结果,本文研究的玻璃表现出明显的表面析晶特征。更多还原

【Abstract】 The crystallization process of （100-x）[0.33B₂O₃-0.67ZnO]-xV₂O₅,where x=0,5,10,15 and 20 were investigated by DTA and XRD.This investigation shows that Zn₃（BO₃）₂,Zn₂V₂O₇ and ZnB₂O₄ are the three crystalline phases which precipitated during heat-treatmentof the glasses.With increasing V₂O₅ content,the glass transit temperature T_g,thecrystallization temperature T_p and melting temperature T_m of each crystalline phase decrease, that come from the decrease of the interconnection degree of the structure units and theweakening of the network linkage of the glass.With V₂O₅ addition,the crystallization ofZn₃（BO₃）₂ becomes weaker,and disappears during heat-treatment of the glasses with x≥15.However,Zn₂V₂O₇ has been detected among the crystalline phases of glasses with x≥10V₂O₅ addition.DTA study reveals that the crystallization of the galss has been controlled bysurface process.更多还原