La部分替代Y对YBa_2Cu_3O_(7-δ)氧传感器性能的影响

Effect of La Partial Substitution for Y on the Properties of YBa_2Cu_3O_(7-δ) Oxygen Sensor

在Al2O3衬底上制备了Y1-xLaxBa2Cu3O7-δ(0≤x≤0.15)厚膜,研究了La部分替代Y对YBa2Cu3O7-δ氧传感器性能的影响和x=0.05样品的电阻与温度和氧分压的关系.与未掺杂膜相比较可看出,各组样品仍然表现出YBCO的基本性质,其中Y0.95La0.05Ba2Cu3O7-δ样品表现出较高的灵敏度和较短的恢复时间,是替代YBa2Cu3O7-δ作为氧传感器的良好的材料.

Y1-xLaxBa2Cu3O7-δ （0~x^0.15） thick films on Al2O3 subs trate were prepared. The effect of La partial substitution for Ba on the properties of YBa3Cu3O7—δ oxygen sensor and the relationship of resistance of .r= 0.05 sample with temperature and oxygen partial pressur was investigated. Comparing with the no-doped film , we can see that the films still stand on the nature of the YBCO, among which the Y0.95 La0.05 Ba2 Cu3 07-δ film have the higher sensitivity and shorter recovery time. It is the good material to take the place of YBa3Cu3O7—δ as the oxygen sensor.