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利用喷雾热解所制务的La_(0.8)Sr_(0.2)MnO_5超微粉末制作电极材料,用8YSZ超微粉制作固体电解质,制成了氧传感器。以N_2—O_2混合气体为待测气体、以空气为参比气体在不同的温度及氧分压下测量了该氧传感器浓差电势的大小。实验结果表明该氧传感器的输出电势与温度和氧分压的关系符合Nernst方程并对氧分压的微量变化反应灵敏。回归得到的该氧传感器的实际刻度方程为: Em(mV)=0.0246T+0.0490TlgP+11.83 该氧传感器能在氧化性、中性及弱还原性气氛的场合下获得实际应用。
The electrode materials were prepared by using the La_ (0.8) Sr_ (0.2) MnO_5 superfine powder prepared by spray pyrolysis, and the solid electrolyte was made by 8YSZ superfine powder to make the oxygen sensor. N 2 O 2 mixed gas as the gas to be measured, the air as the reference gas at different temperatures and partial pressure of oxygen measured the oxygen sensor concentration potential. The experimental results show that the oxygen sensor output potential and temperature and oxygen partial pressure in line with the Nernst equation and sensitive to changes in the partial pressure of oxygen sensitive. The regression equation of the oxygen sensor is: Em (mV) = 0.0246T + 0.0490TlgP + 11.83 The oxygen sensor can be used in oxidizing, neutral and weak reducing atmosphere.