【摘要】 以固相合成法直接合成ＢａＣｅ_０．９５Ｙ_０．０５Ｏ_３－α，用阻抗谱技术测得其电导率在４５０－１０００℃为１０^－３－１０^－２Ｓ·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_０．０５Ｙ_０．０５Ｏ_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．更多还原

【Abstract】 BaCe_0.95Y_0.05O_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_0.95Y_0.05O_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.更多还原