无机材料学报

• 研究论文 • 上一篇    下一篇

磷酸盐玻璃熔炼时对铂的腐蚀

余尧楚; 姜中宏   

  1. 中国科学院上海光学精密机械研究所; 上海201800
  • 收稿日期:1996-03-22 修回日期:1996-05-20 出版日期:1997-06-20 网络出版日期:1997-06-20

Erosion of Platinum Crucible in Melting Phosphate Glass

YU Yaochu; JIANG Zhonghong   

  1. Shanghai Institute of Optics and Fine mechanics; Chinese Academy of SciencesShanghai 201800 China
  • Received:1996-03-22 Revised:1996-05-20 Published:1997-06-20 Online:1997-06-20

摘要: 通过对磷酸盐的生成热和标准熵比较准确的估算,并应用热力学第一近似方程,对磷酸盐玻璃的熔炼过程进行了剖析,发现体系中存在的氧和水是铂坩埚受侵蚀的主要原因,而腐蚀产物Pt(PO32和Pt(PO34能容易地和游离氧化物发生反应,释出铂粒子。通入POCl3气氛,既可除水,除去游离氧化物,又能达到隔绝空气的目的,从而可导致铂粒子大大地减少.

关键词: 生成热的估算, 标准熵的估算, 磷酸盐玻璃, 铂的腐蚀

Abstract: More accurately calculating the heat of formation and standard entropy of phosphate, andappliying thermodynanric first approximate equation, the authors analysed the melting proeessof phosphate glass. Oxygen and water existing in the system are the mAlN reason of Pt cruciblebeing eroded, and the erosive products Pt(PO3)2 and Pt(PO3)4 can easily react with free oxides,releasing Pt particles. POCl3 atmosphere introduced can either eliminate water and free oxides,or insulate air, so that Pt particles can be decreased.

Key words: estimation of heat of formation, estimation of standard entropyt phosphate glass, erosion of platinum