甲醛气体传感器的研究
Study of the formaldehyde gas sensor
云南民族大学学报:自然科学版,2017,26(2):159-161

刘子骐 LZQ

摘要


以纳米材料SnO2、ZnO为原料的气敏传感器对大多数VOC气体具有敏感性.以SnO2和ZnO为基料制作旁热式甲醛气敏元件,并比较二者的气敏特性.选用对甲醛敏感的SnO2材料作为元件基料,为改善其对甲醛的气敏特性,选择03%La2O3、05%La2O3、07%La2O3的3种比例掺杂,运用控制变量法分别在不同烧结温度和不同工作温度下进行测试.结果表明:掺杂03% La2O3的SnO2气敏元件在烧结温度为700 ℃,工作温度为300℃下对甲醛的气敏特性良好. The gas-sensitive sensors made with SnO2 and ZnO are sensitive to most VOC gases. Beside-heated formaldehyde gas sensors with SnO2 and ZnO are introduced and gas-sensing properties are discussed in this paper. Formaldehyde-sensitive SnO2 is chosen as the base material, 0.3% La2O3, 0.5% La2O3 and 0. 7% La2O3 are used to optimize the gas-sensing properties. The controlling variable method is applied in this case at different sintering temperatures as well as different working temperatures. The result shows that the gas sensors with 0.3% SnO2 have a better gas-sensing property at the sintering temperature of 700 ℃ and the working temperature of 300 ℃.

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