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熔化过程中PbO-PbBr2-PbF2-P2O5系统玻璃成分的变化

赵宏生; 周万城; 朱冬梅   

  1. 西北工业大学凝固技术国家重点实验室, 西安 710072
  • 收稿日期:1999-04-12 修回日期:1999-05-30 出版日期:2000-04-20 网络出版日期:2000-04-20

Composition Change During Melting of PbO-PbBr2-PbF2-P2O5 System Glass

ZHAO Hong-Sheng; ZHOU Wan-Cheng; ZHU Dong-Mei   

  1. State Key Laboratory of Solidification Processing; Northwestern Polytechnical University; Xian; Shaanxi 710072; China
  • Received:1999-04-12 Revised:1999-05-30 Published:2000-04-20 Online:2000-04-20

摘要: 了研究PbO-PbBr-PbF-P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-PbBr-PbF-P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P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.

关键词: 玻璃, 化学分析, 挥发形式, 化学热力学计算

Abstract: 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.

Key words: glass, chemical analysis, volatilization form, chemical thermodynamic calculation

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