【摘要】 以In₂O₃为敏感电极的混合电位型传感器对于NH₃具有良好的响应,其电势变化值ΔPotential与氨气浓度对数值logC_NH3之间存在良好的线性关系,在550℃下灵敏度达到了-64.20 mV/decade,此外在敏感电极中掺杂30%YSZ（摩尔分数）可以有效增加传感器的响应电势值。通过选择性实验发现此传感器对C₃H₆、CH₄、CO₂、NO不敏感,但CO及NO₂对其存在一定的交叉干扰性,为了提高In₂O₃敏感材料传感器对NH₃的选择性,在In₂O₃敏感电极上引入Ag单质,可以提高此传感器对NH₃的灵敏度,并有效抑制CO、NO₂的干扰性。更多还原

【Abstract】 The mixed potential type sensor with In₂O₃ as the sensing electrode responses to NH₃ excellently,which shows a good linear relationship between the response potential values and the logarithm of the NH₃ concentrations,and the best sensitivity is-64.20 mV/decade at 550 ℃.In addition,the sensing electrode doped with 30% YSZ（molar fraction）can effectively increase the response potential of the sensor.Selective experiment showed that the sensor is not sensitive to C₃H₆,CH₄,CO₂ and NO,while the notable cross-interference of CO and NO₂ is observed.In order to improve the selectivity of the sensor to NH₃,In₂O₃ sensing electrode introduces Ag.As a result,the sensitivity to NH₃ is increased and the influence of CO and NO₂ is restrained.更多还原