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型异质结界面，然后开发高温传感器件，通过测试特定的气体传感功能，其性能得到显着改善，获得了以下结果。 .1) 通过使用氧化物传感电极，开发了一种基于稳定氧化锆 (YSZ) 的传感器，用于在高温下选择性检测碳氢化合物。在测试的 14 种氧化物中，发现 CdO 效果最好。适用于管式装置的传感电极，对 600 ℃ 空气中的丙烯具有选择性和快速响应。2）还对使用氧化物传感电极的基于 YSZ 的传感器进行了 NOx 检测。在550~700℃温度下对空气中NO_2的灵敏度最高。3)YSZ与SnO_2传感电极的组合给出了相对较高的灵敏度。在475 ℃空气中对N_2O具有较高的灵敏度。在SnO_2中添加外来氧化物(如Bi_2O_3和Sm_2O_3)可以有效提高N_2O的灵敏度。4)研究了传感电极中引入In_2O_3的基于NASICON的CO_2传感装置。结果表明，在潮湿条件下很容易实现室温下的CO_2传感能力。因为NaHCO_3和Na_2CO_3被怀疑在NASICON盘表面自发形成，从而赋予CO_2敏感性。5)基于NASICON的电流传感器被设计用于检测空气中的总NOx。为了使该装置对NO_2和NO都敏感，传感。 Au电极上覆盖有NO氧化催化剂，带有WO_3和负载Pt的SiO_2双催化剂层的附加装置产生与NO_2或NO_2浓度成正比的电流响应。 150℃时NO高达1 ppm。