物理化学学报 >> 1996, Vol. 12 >> Issue (03): 272-275.doi: 10.3866/PKU.WHXB19960316

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La传感器在测定铝液凝固过程中La活度研究

王平,王常珍,徐秀光   

  1. 东北大学冶金物理化学教研室，沈阳 110006
  • 收稿日期:1995-04-25 修回日期:1995-10-10 发布日期:1996-03-15
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Study on the Effect of La-activity in La-sensor on the Determination of the Liquefaction of Aluminum

Wang Ping,Wang Chang-Zhen,Xu Xiu-Guang   

  1. Northeast University,Shengyang 110006
  • Received:1995-04-25 Revised:1995-10-10 Published:1996-03-15
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关键词: 传感器, 活度, 镧, 固体电解质

Abstract:

La0.95Ca0.05F2.95 polycrystalline solid electrolyte tube was prepared. The La sensor was made by using such solid electrolyte tube, pure La as reference electrode and Mo wire as lead wire. the cell can be experssed as:
Mo|La(S)| La0.95Ca0.05F2.95|[La]Al|Mo Ceramal
The activities of dissolved La in liquid (750℃) aluminum with three different La concentrations were determined. The change of La activity and po2 with temperature in the solidfication process (750-500℃) was also determined, the result showed some regularities existed. In the course of rising and falling of temperature the La probe can be used repeatly 2-3 times.

Key words: Sensor;Activity, Lanthanum, Solid electrolyte