| 1. | Two kinds of wo3 powder are prepared by sol - gel method and gas - phase reaction method with tungsten filament , and heater type gas sensors to trimethylamine are made . under different work temperatures , these sensors ’ sensitivities are measured , and the result indicates that wo3 by sol - gel has better gas sensing performance to trimethylamine . at the same time , the wo3 - based gas sensor to trimethylamine can work at low temperature , which
3 、本课题对不同掺杂的wo3材料进行了研究,发现掺杂3 % pd的wo3基气敏元件在150ppm三甲胺气体中,最佳工作温度仅为85 ,该温度下元件最高灵敏度可达11 . 7 ,并且元件的灵敏度随tma浓度的升高而变大,这表明掺杂pd的wo3材料在低温下对tma气体有很好的响应。 |
