石墨对含钴SnO_2基气敏元件性能的影响

INFLUENCE OF GRAPHITE TO THE CHARACTERISTICS OF SnO_2 BASED GAS SENSOR CONTAINING Co_2O_3

钴添入ＳｎＯ２中可增大对乙醇气体的灵敏度，但同时带来一些不利因素．将石墨添加到不同钴含量的ＳｎＯ２基酒敏陶瓷中可以改善其电气性能，克服钴的副作用．通过对样品室温电阻的大小、时间稳定性和老化性三个方面进行研究，得到的结论是：在１０６０℃添加１％Ｗｔ左右的Ｃｏ２Ｏ３，并掺入１％～５％Ｗｔ的石墨。

It’s possible to increase the sensitivity to alcohol gas by adding Co to SnO 2,but bringing some other factors. Graphite in SnO 2 containing Co could change electric characteristics. Room resistance,time stability and durability are researched. The result is,in 1 060℃ sinter,adding Co 2O 3 about 1% Wt and graphite 1%～5% Wt is the best condition.