Humidity Sensing Characteristics and Transduction Mechanism of Mg2+ Added BaSrTiO3 Perovskites

被引：1
|
作者：
Farahani, Hamid [1 ,2 ]
Wagiran, Rahman [3 ]
Urban, Gerald A. [1 ,2 ]
机构：
[1] Univ Freiburg, Freiburg Mat Res Ctr, FMF, Stefan Meier Str 21, D-79104 Freiburg, Germany
[2] Univ Freiburg, Dept Microsyst Engn, Sensors Lab, IMTEK, D-79110 Freiburg, Germany
[3] Univ Putra Malaysia, Dept Elect & Elect Engn, UPM, Serdang 43400, Selangor, Malaysia
来源：
2021 IEEE SENSORS | 2021年
关键词：
humidity sensor; MgO; perovskite; impedance spectroscopy; Gerischer impedance; protonic mechanism; SENSORS;
D O I：
10.1109/SENSORS47087.2021.9639535
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Resistive type humidity sensors based on porous (Ba0.5,Sr0.5)TiO3 (BST) and BST doped with MgO nanocomposites (1, 3, and 5 mol%) were developed and investigated. The XPS, Raman Spectroscopy, and FTIR were used for complementary characterizations in addition to the XRD, TEM, SEM and EDX. As a second goal, the transduction mechanism of the BST perovskites was studied through EIS and a Gerischer element with the value of 2.26x10(6) Omega was detected for the first time in this field. The Gerischer is a boundary element with a different impedance than the normal Warburg (1.22x10(6) Omega) and is originated due to the coupling of chemical reaction(s) with redox activities. The electrical results of the sensors indicate that the BST device shows promising properties, whereas the MgO dopants have no significant influence on the humidity resistance of the BST perovskites.
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页数：4
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