A12O3纳米管阵列瓦斯传感器设计及相关机理研究

项目名称： A12O3纳米管阵列瓦斯传感器设计及相关机理研究

项目编号： No.61473095

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 自动化技术、计算机技术

项目作者： 张洪泉

作者单位： 哈尔滨工程大学

项目金额： 86万元

中文摘要： 目前催化瓦斯传感器在使用中存在催化载体物理结构变化和催化剂失活导致传感器稳定性差等科学问题。将探索催化传感器一种新型纳米管阵列载体设计及微加工成型制造方法及相关机理，建立Al2O3定向纳米管阵列载体的相关电学、热学理论模型，以及载体的热稳定晶型结构控制规律；研究瓦斯气体反应的对流-传导-辐射耦合热传输机制，以及敏感电极的膜厚与膜缺陷及膜热稳定性的关系，解决催化剂敏感因子修饰技术及传感器虚拟阵列盲源信号分离技术等关键科学问题。本课题提出了利用Al2O3定向纳米管阵列做为催化瓦斯传感器载体设想，并在纳米管内壁修饰贵金属催化剂，及稀土和过渡金属氧化物助催剂，形成通透式催化载体，改变了传统利用Al2O3粉体烧结形成的盲孔式载体结构而造成的反应物扩散受限，易造成传感器的烧结、结焦等失效模式，能有效抑制传感器零点及灵敏度漂移，为制作出高性能瓦斯传感器奠定理论基础。

中文关键词： 传感器；气体传感器；纳米传感器

英文摘要： In the operating of catalyzing gas sensors at present exist the scientific problem of catalytic carrier physical structure changes and catalyst deactivation leading to poor stability. We explore a catalytic sensor with novel nanotube arrays carrier design and micro processing molding manufacture method and the related mechanism, and establish electrical and thermal theory models related to Al2O3 directional carrier nanotube arrays, as well as the thermostable crystal structure of control rule of the carrier. We study the convection-conduction-radiation coupled heat transfer mechanism of gas reaction, and the relationship between film thickness and defect and thermostability of sensitive electrode, and solve the key problems of catalyst sensitive factor modification techniques and virtual array blind source signals separation technology. This project propose a imagination that using Al2O3 directional nanotube arrays as carrier catalytic of gas sensor, and modify the nanotube inner wall with noble metal catalyst and rare-earth transition-metal oxides promoter to form a transparent catalytic carrier. It changes the reactant diffusion limited and sintering, coking and other failure mode caused by traditional blind hole type carrier structure sintered by Al2O3 powder. It can effectively inhibit the zero and sensitivity drift of the sensor, and lays the foundation for the fabrication of high performance gas sensors.

英文关键词： sensor;gas sensor;nano sensor