Application of bismuth ferrite protonic conductor for ammonia gas detection

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• 作者：Ma?gorzata Dziubaniuk ; Renata Bujakiewicz-Koro¨½ska ; Jan Suchanicz ; Jan Wyrwa ; Mieczys?aw R?kas
• 关键词：Ammonia gas sensor ; p-type semiconductor ; Electrical Impedance Spectroscopy
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：188
• 期：Complete
• 页码：957-964
• 全文大小：1821 K

文摘

The ammonia sensing properties of BiFeO₃ (BFO) multiferroic semiconductor were investigated. The material was prepared by solid state reaction method. The sintered sample was studied by X-ray diffraction analysis (XRD), Raman Spectroscopy and Scanning Electron Microscopy (SEM). Electrical conductivity of BFO was determined by Electrical Impedance Spectroscopy (EIS) in temperature range 100-700 ¡ãC at different gaseous atmospheres. The BFO resistance responses to ammonia concentrations of 0-2100 ppm in argon were recorded in the temperature range of 300-600 ¡ãC. Similar measurements were carried out in atmosphere containing 0-2100 ppm ammonia in synthetic air in temperature range of 350-450 ¡ãC. The effect of water vapor on sensor performance was investigated. The sensor working mechanism has been explained.