%0 Journal Article
%T Complex Impedance Analysis for Sensitivity and Selectivity of SnO2 Gas Sensors<br>SnO2气敏元件灵敏度及选择性的复阻抗分析
%A FU Gang
%A CHEN Zhi-Xiong
%A ZHANG Jin-Xiu
%A <br>傅刚
%A 陈志雄
%A 张进修
%J 无机材料学报
%D 2000
%I Science Press
%X The impedance characteristics of thick films gas sensors were investigated by measuring the dependence of the reactance component on frequency in testing gas. Using the variations of reactance with the concentration of gasoline or alcohol gas to define the sensitivity of gas sensors, a new method greatly improving the sensitivity and selectivity of gas sensors compared with the traditional d.c. method was proposed. Such improvements maybe come from that the complex impedance analysis detects not only the change of grain boundary resistance but also the change of grain boundary capacitance with the gas adsorption and/or desorption on the surfaces of sensors.
%K SnO2 thick film
%K alcohol sensor
%K complex impedance
%K sensitivity
%K selectivity<br>复阻抗测试
%K 灵敏度
%K 选择性
%K 二氧化锡
%K 气敏元件
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=F0E2253BA2A8AD74&yid=9806D0D4EAA9BED3&vid=23CCDDCD68FFCC2F&iid=38B194292C032A66&sid=522844664D9E629A&eid=E0172F1A638CE984&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=10&reference_num=5