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未经掺杂的金属氧化物半导体气敏传感器通常灵敏度很高 ,但选择性较差。为提高选择性和一致性 ,设计了一种特殊结构的低功耗SnO2 烧结气敏元件的制备方法 ,测试了SnO2 烧结气敏元件的气敏特性。制备的SnO2 烧结气敏元件在 4 0mW的加热功率条件下 ,10 0 ppm的CO气氛中灵敏度达到 3,响应时间仅为 4s ;在 180mW的加热功率条件下 ,对氢和碳氢化合物 (如CH4 和LPG)敏感。这类低功耗烧结气敏元件选择性和一致性好 ,有望用于室内煤气泄漏检测等场合。
Un-doped metal oxide semiconductor gas sensor usually high sensitivity, but less selective. In order to improve the selectivity and consistency, a special structure of low-power SnO2 sintered gas sensor was designed and the gas-sensing characteristics of SnO2 sintered gas sensor were tested. The prepared SnO2 sintered gas sensor has the sensitivity of 3 and the response time of only 4s under a heating power of 40mW in a CO atmosphere of 10 0 ppm and a reaction time of only 4s under a heating power of 180mW for hydrogen and hydrocarbons And LPG) sensitive. Such low-power sintered gas sensor selectivity and consistency, is expected to be used for indoor gas leak detection and other occasions.