熔化过程中PbO-PbBr_2-PbF_2-P_2O_5系统玻璃成分的变化  

Composition Change During Melting of PbO-PbBr_2-PbF_2-P_2O_5 System Glass

作　　者：赵宏生[1] 周万城[1] 朱冬梅[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,西安710072

出　　处：《无机材料学报》2000年第2期237-242,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金!(59772005)

摘　　要：为了研究ＰｂＯ－ＰｂＢｒ２－ＰｂＦ２－Ｐ２Ｏ５系统玻璃在熔化过程中成分的变化，本文应用定 量化学分析法测出了玻璃在熔化后的成分．结果表明，ＰｂＯ－ＰｂＢｒ２－ＰｂＦ２－Ｐ２Ｏ５系统玻璃熔化 时氟和磷的损失较大，铅的损失相对较小；溴的损失随配料中各元素含量的多少而变化．氧含 量的变化受Ｐ２Ｏ５的挥发以及氧、水分与玻璃熔体中卤化物的反应程度两个因素影响．相关化 学反应的热力学计算与分析结果相吻合．To study the composition change during melting of PbO-PbBr2-PbF2-P2O5 system glass, the quantitative chemical analysis was complied to measure the composition of the glass after melting. The results show that the loss of lead during melting is mainly ascribed to the volatilization of PbBr2. When a sample contains a high content of phosphorus and a low content of fluorine, the loss of bromine and phosphorus is remarkable, mainly in the form of PBr3. On the other hand, if a sample contains a high content of fluorine and a low content of bromine or a low content of phosphorus, bromine will not lose much while a large amount of phosphorus and fluorine are lost during melting, mainly in the form of PF5. The reaction between phosphorus and fluorine is much easier than that between phosphorus and bromine. The results of thermodynamic calculation are consistent with the above results and discussions. The content of oxygen is influenced by two factors. Volatilization of P2O5 decreases the content of oxygen, while the reaction between oxygen or water in air and halides in melts increases the content of oxygen.

关 键 词：玻璃 化学分析 化学热力学计算 熔化 熔制 

分 类 号：TQ171.12[化学工程—玻璃工业] TQ171.622[化学工程—硅酸盐工业]