报告题目 ：A New Solid-State Gas Sensor Design for Environmental Pollution Measurement

报 告 人 ：Prof. Youichi Shimizu

        Kyushu Institute of Technology, Japan

报告人单位：日本九州工业尊龙凯时

主 持 人 ：卢革宇 教授

报告时间 ：2016年5月27日 9:00

报告地点 ：南区唐敖庆楼D区314报告厅

主办单位 ：电子科学与工程学院

集成光电子学国家重点联合实验室

Abstract

Compact NOx sensors which have high sensitivity, low cost and easily designed have been strongly required for improving combustion from engine and the regulation of exhaust NOx. In this talk, a new concept solid-state gas sensors have been demonstrated, which based on solid-electrolyte impedance transducer and some receptor materials (i.e., perovskite-type oxide). Impedance characteristics of this sensor were measured at various concentrations of NO and NO2 at the frequency between 50 Hz and 5 MHz. Nyquist plots of the LaCoO3/LATP device to NO2 at 400°C showed the impedance change with changing concentrations of NOx at the interface impedance area. The sensor did not respond to NO2 at 500 °C, but to NO. In addition, the sensor showed high NO selective detection against to O2 and CO2 at 500°C. It was found that the capacity of the sensor elements showed similar response dependencies to both NO and NO2. As for the response in resistance at 400°C, the opposite positive and negative responses were seen to NO and NO2. It seems that highly sensitive and selective NOx sensor should be constructed by choosing a receptor material.

CV：Prof. Youichi Shimizu received his BS, MS, and PhD degrees from Kyushu University in 1983，1985 and 1992 , respectively . Between 1986 and 1993, he was a research associate in Graduate School of Engineering Sciences, Kyushu University. From 1994 to 2004, he was an associate professor in Faculty of Engineering, Kyushu Institute of Technology. In 1996, as a visiting associate professor, he studied in Dept. of Materials Sci. & Eng., McMaster University, Canada. In 2004, he became a professor in Faculty of Engineering, Kyushu Institute of Technology. From 2009, he is the director, Science Education Center, Kyushu Institute of Technology. His interests are in synthesizing and characterizing high functional inorganic materials for application in chemical sensor devices, batteries, and optical-devices based on ceramic materials such as solid electrolyte, oxide thin- & thick- films. He has won the awards including Young Investigator (Sano) Award: 1995, from The Electrochemical Society of Japan, ITE Research Award: 2004, from International Technology Exchange Society, USA. Seiyama PRIZE: 2005, from Japan Association of Chemical Sensors, The Electrochemical Society of Japan.