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Citation: Wang Ping, Wang Chang-Zhen, Xu Xiu-Guang. Study on the Effect of La-activity in La-sensor on the Determination of the Liquefaction of Aluminum[J]. Acta Physico-Chimica Sinica, ;1996, 12(03): 272-275. doi: 10.3866/PKU.WHXB19960316 shu

Study on the Effect of La-activity in La-sensor on the Determination of the Liquefaction of Aluminum

1.
Northeast University,Shengyang 110006

Received Date: 25 April 1995
Available Online: 15 March 1996

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.
- Sensor;Activity,
- Lanthanum,
- Solid electrolyte
  ,
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