掺杂对甲醛气敏元件气敏特性的改善  

Improvement of Gas Sensing-characteristics of Formaldehyde Gas Sensor by Doping

作　　者：杜海英[1] 王兢[2] 吴娜[2] 

机构地区：[1]大连民族学院机电信息工程学院,辽宁大连116600 [2]大连理工大学电信学院,辽宁大连116023

出　　处：《仪表技术与传感器》2009年第3期9-11,共3页Instrument Technique and Sensor

基　　金：国家自然科学基金资助项目(60474052);辽宁省自然科学基金资助项目(20032127)

摘　　要：纳米材料SnO2对大多数VOC气体具有敏感性。文中以SnO2为基料制作了旁热式甲醛气敏元件,为改善甲醛气敏元件的气敏特性,选择了2%Sb,3%Sb,2%Pd,3%Pd,4种比例的掺杂材料,并以低体积分数甲醛作为测试气体,对SnO2气敏元件的气敏特性进行了测试。结果显示:掺杂2%Pd的气敏元件气敏特性良好。Nano-SnO2 is sensitive to most of VOC. Indirect-heat formaldehyde gas sensors were made of undoped nano-SnOz, four proportions of doping materials, including 2% Sb, 3% Sb, 2% Pd and 3% Pd, were chosen to improve the gas sensitivecharacteristics of formaldehyde sensor. The gas sensitive-characteristics of SnO2 gas sensor were tested with low concentration form- aldehyde as the test gas. The result shows that the 2% Pd doped SnO2 sensor has the best gas sensitive-characteristics.

关 键 词：气敏特性 灵敏度 掺杂 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]