具有低辐射热的热导气体传感器设计与实现  

Design and Realization of Thermal Conductivity Gas Sensor with Low Radiant Heat

作　　者：李栋辉 孙永国[1] 张洪泉 LI Dong-hui;SUN Yong-guo;ZHANG Hong-quan(School of Mechanical and Power Engineering,Harbin University of Science and Technology,Harbin 150080,China;School of Intelligent Science and Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨理工大学机械动力工程学院,黑龙江哈尔滨150080 [2]哈尔滨工程大学智能科学与工程学院,黑龙江哈尔滨150001

出　　处：《仪表技术与传感器》2021年第9期1-5,共5页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(62071138);黑龙江省自然科学基金项目(ZD2015014);国家传感器联合重点实验室开放项目(SKT1905);黑龙江省财政资助项目(GX17A014)。

摘　　要：针对传统热导传感器在高温工作条件下辐射热较高,造成传感器响应时间慢、检测精度低的问题,基于GO(氧化石墨烯)/α-Al_(2)O_(3)内外核结构设计并研制了具有低辐射热的热导气体传感器,省去了传统热导传感器制备的黑化步骤,并通过ANSYS有限元方法对所设计热导传感器的温度场进行仿真分析。GO载体材料采用氧化插层法制备,α-Al_(2)O_(3)载体材料采用化学沉淀法制备,经透射电镜观察,GO呈导热微片结构,α-Al_(2)O_(3)具有良好的低发射率颗粒状结构。测试结果表明:传感器具有良好的线性输出特性与功耗利用率,对CO_(2)气体的响应时间为27 s,恢复时间为16 s,灵敏度为0.26 mV/1%CO_(2)气体。In view of the high radiant heat of the traditional thermal conductivity sensor under high temperature working conditions,which results in the slow response time and low detection accuracy of the sensor,based on the GO(graphene oxide)/α-Al_(2)O_(3)inner and outer core structure design and development of a low radiation heat thermal conductivity gas sensor,the blackening step of traditional thermal conductivity sensor preparation was eliminated,and the temperature field of the designed sensor was simulated and analyzed by ANSYS finite element method.GO carrier material was prepared by oxidation intercalation method,α-Al_(2)O_(3)carrier material was prepared by chemical precipitation method.Observed by transmission electron microscope,GO has a thermally conductive micro-sheet structure,andα-Al_(2)O_(3)has a good low-emissivity granular structure.The test results show that the sensor has good linear output characteristics and power consumption utilization.The response time to CO_(2)gas is 27 s,the recovery time is 16 s,and the sensitivity is 0.26 mV/1%CO_(2)gas.

关 键 词：内外核结构 辐射热 α-Al_(2)O_(3) 热导传感器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]