Design of high-performance sensors by using specific sensing function of hetero-junction interfaces between ionic conductor and semiconductor

利用离子导体与半导体异质结界面的特定传感功能设计高性能传感器

基本信息

批准号：
12450346
负责人：
MIURA Norio
金额：
$ 9.6万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450346/
关键词：
hetero junction gas sensor solid electrolyte semiconductive oxide ionic conductor stabilized zirconia NASICON

项目摘要

The present study aimed to design, construct and control new hetero-junction interfaces between ionic conductor and oxide semiconductor and then to develop high-temperature sensing devices whose properties were drastically improved by giving specific gas-sensing function. Consequently, the following results were obtained.1) By using an oxide sensing electrode, a stabilized zirconia (YSZ)-based sensor was developed for the selective detection of hydrocarbons at high temperature. Among the 14 kinds of oxide tested, CdO was found to be best suited for the sensing electrode of a tubular device, giving selective and quick response to propylene in air at 600 ℃.2) An YSZ-based sensor using oxide sensing-electrode was also examined for NOx detection. Among spinel-type oxides tested ZnFe_2O_4 has the highest sensitivity to NO_2 in air at temperatures of 550-700 ℃.3) It was found that the combination of YSZ and SnO_2 sensing electrode gave a relatively high sensitivity to N_2O in air at 475 ℃. The addition of a foreign oxide (e.g. Bi_2O_3 and Sm_2O_3) to SnO_2 was effective to improve the N_2O sensitivity.4) A NASICON based CO_2 sensing device with In_2O_3 introduced in the sensing electrode was investigated. It was shown that the CO_2 sensing capability at room temperature was easily attained under humid condition. Some sorts of auxiliary phases such as NaHCO_3 and Na_2CO_3 were suspected to form spontaneously on the NASICON disk surface to give CO_2 sensitivity.5) A NASICON based amperometric sensor was designed for the detection of total NOx in air. To make the device sensitive to both NO_2 and NO, the sensing Au electrode was covered with NO oxidation catalysts. The device attached with double catalyst layers of WO_3 and Pt-loaded SiO_2 produced current response proportional to the concentration of NO_2 or NO up to 1 ppm at 150 ℃.

本研究旨在设计，构建和控制离子导体和氧化物半导体之间的新的异孔接口，然后开发高温传感器设备，其特性通过提供特定的气体感应函数，从而大大改善其性能。因此，获得以下结果。1）通过使用氧化物传感电极，开发了基于稳定的锆石（YSZ）传感器，以选择性检测高温下的碳氢化合物。在经过14种测试的氧化物中，发现CDO最适合管状设备的传感器电极，从而在600℃.2）中对空气中的丙烯具有选择性，快速响应。在测试ZnFe_2O_4测试的尖晶石型氧化物中，在550-700℃.3的温度下，对空气中的NO_2具有最高的敏感性，发现YSZ和SNO_2敏感性电极的组合给出了对空气中N_2O的相对较高的敏感性。将外氧化物（例如BI_2O_3和SM_2O_3）添加到SNO_2中是有效提高N_2O敏感性的有效。4）研究了一种基于NASICON的CO_2敏感性设备，并研究了在灵敏度电极中引入的IN_2O_3。结果表明，在潮湿的条件下，在室温下很容易附着CO_2灵敏度能力。怀疑某些辅助相位，例如NaHCO_3和Na_2CO_3，以在Nasicon磁盘表面发起了赞助，从而具有CO_2敏感性。5）设计一种基于NASICON的安培传感器，设计用于检测空气中的总NOX。为了使设备对NO_2和NO敏感，灵敏度AU电极被覆盖，没有氧化催化剂。与WO_3的双催化剂层和PT负载的SIO_2相连的设备产生的电流响应与NO_2的浓度成正比，或者在150°时最多1 ppm。