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以溶胶-凝胶法制备的NASICON为基体导电层材料,以水热法制备的纳米片状Co3O4为敏感电极材料,制备了一种检测低浓度丙酮的管式结构固体电解质型气体传感器,利用静态配气法对传感器的气敏性能进行了测试,结果表明:当工作温度为300~375℃时,传感器对体积分数为0.5×10–6~100×10–6的丙酮表现出了较好的气敏性能,其检测下限能达到0.5×10–6(体积分数),传感器电动势变化值(?V)与丙酮浓度的对数呈线性关系,在温度为350℃时,传感器对丙酮的灵敏度达到最大值–24.5 mV/decade,另外,该传感器还具有较快的响应恢复速度和较好的选择性。
NASICON prepared by the sol-gel method was used as the substrate conductive layer material. The nanosheet Co3O4 hydrothermal method was used as the sensitive electrode material to prepare a tubular solid electrolyte gas sensor with low acetone concentration. The gas sensitivity of the sensor was tested by the gas distribution method. The results showed that when the working temperature was 300 ~ 375 ℃, the sensor showed good performance for acetone with the volume fraction of 0.5 × 10-6 ~ 100 × 10-6 Gas sensitivity, the detection limit can reach 0.5 × 10-6 (volume fraction), the change of sensor electromotive force (V) and the logarithm of acetone concentration has a linear relationship, at a temperature of 350 ℃, the sensor sensitivity of acetone reached The maximum -24.5 mV / decade, in addition, the sensor also has a faster response speed and better selectivity.