物理化学学报 >> 1999, Vol. 15 >> Issue (11): 997-1000.doi: 10.3866/PKU.WHXB19991108

研究论文 上一篇    下一篇

微量元素对固态锡在持续升温时氧化过程的影响

何新星, 陈荣, 张启运   

  1. 北京大学化学与分子工程学院,北京 100871
  • 收稿日期:1999-01-13 修回日期:1999-04-06 发布日期:1999-11-15
  • 通讯作者: 陈荣

Effect of Trace Additive on the Oxidation Process of Solid Tin in a Steady lncrease of Temperature

He Xin-Xing, Chen Rong, Zhang Qi-Yun   

  1. College of Chemistry and Molecular Engineering,Peking University,Beijing 100871
  • Received:1999-01-13 Revised:1999-04-06 Published:1999-11-15
  • Contact: Chen Rong

摘要:

用DTA、TG研究了不同粒度纯Sn和含微量Ga、S、Cu时的Sn在20℃•min-1的持续升温过程中的氧化过程,测定了升温过程中间产物的XRD图.结果表明,随着粒度增大, Sn开始氧化的温度提高. 添加0.1%的Ga提高了锡的氧化稳定性,表面生成一层SnO;添加微量Cu对Sn的氧化影响很小;添加0.1%的S时,氧化稳定性降低.氧化过程中, 除添加Ga者外,其它无中间产物SnO生成.

关键词: 氧化过程, 锡, 微量添加元素

Abstract:

The oxidation process of pure tin and tin samples doped by Ga, S and Cu with different particle sizes has been investigated by DTA,TG and XRD methods. Results revealed that 0.1%addition of Ga markedly influenced the oxidation process of tin. In the heating process, SnO which presents as a more compact film formed on the surface of the particles protected the particles from oxidation to certain extent. In the other cases, tin oxidized into SnO2 directively. S addition deteriorated the oxidation process and lowered the oxidation temperature.

Key words: Oxidation process, Sn, Trace additives