Ta2O5对B2O3-La2O3-CaO系统玻璃生成范围的影响

本文研究了在B₂O₃—La₂O—CaO三元系统中,当Ta₂0₅的含量分别为5、10、15、20wt%时,该系统的玻璃生成范围.结果表明,随着Ta₂O₅含量的增加,系统的玻璃生成范围向贫B₂O₃,富La₂O₃边界扩充.当Ta₂O₅的含量为10wt%时,玻璃的生成区域最大.通过差热分析确定了玻璃析晶温度,并用X射线衍射进行了物相鉴定.结果表明,随Ta₂O₅取代La₂₃其主结晶相的放热峰或吸热峰的位置变化不同,所析出的结晶物质亦不同.

Effect of Ta2O5 on the Glass Forming Region of Glass in System B2O3-La2O3-CaO

In this paper, glass forming region in system B₂O₃—La₂O₃—CaO is described. Experimental results indicate that the glass forming region is shifted to poor-B₂O₃, rich-La₂O₃ region with increasing the component of Ta₂O₅,When component of Ta₂O₅ equals to 10 wt% the glass forming region is maximum. Crystalline temperature of glass and glass crystalline have been determined with DTA and X—ray. the results show that the position of exothermic peak and endothermic peak of main crystalline Will also be defferent.