以固相合成法直接合成ＢａＣｅ_（０．９５）Ｙ_（０．０５）Ｏ_（３－α），用阻抗谱技术测得其电导率在４５０－１０００℃为１０~（－３）－１０~（－２）Ｓ·ｃｍ~（－１），电导激活能为Ｅａ＝０．４９ｅｖ（空气气氛下）．用差热分析法检证了该材料的热稳定性．制得ＢａＣｅ_（０．０５）Ｙ_（０．０５）Ｏ_（３－α）固体电解质管，以金属氢化物为参比电极，Ｍｏ丝为电极引线组装氢传感器，研究其对熔融铝合金中氢活度的传感特性．实验发现，定氢探头响应很灵敏，电动势能持续稳定２ｍｉｎ以上，实验条件下多次使用未见有开裂或渗漏现象，固体电解质管也不与铝合金溶液发生作用．
BaCe_(0.95)Y_(0.05)O_(3-α) electrolyte is prepared by solid state reaction. In the temperature range of 450-1000℃, the conductivity is 10~(-3)-10~(-2) S·cm~(-1),the activation energy in air is 0.49 eV, measured by impedance spectroscopy technology. The hydrogen sensors for measureing the hydrogen activity in molten Al alloy is manufactured, using BaCe_(0.95)Y_(0.05)O_(3-α) as solid electrolyte, metal hydride as reference electrode and Mo wire as lead wire. The results showed that the sensor has a high sensitivity and a good stability within the range of experiment temperature.(Correspondent: WANG Changzhen, professor, Faculty of Metallurgical Physical Chemistry, Northeastern University, Shenyang 110006)
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