Study on Dielectric and Humidity Sensing Properties of La1-xSrxFeO3 Materials

被引：3

作者：

Yao, Peng-Jun ^{[1
,3
]}

Wang, Jing ^{[1
]}

Ji, Min ^{[2
]}

机构：

[1] Dalian Univ Technol, Sch Elect & Informat Engn, Dalian 116023, Peoples R China

[2] Dalian Univ Technol, Sch Chem Engn, Dalian 116023, Peoples R China

[3] Shenyang Normal Univ, Sch Educ Technol, Shenyang, Peoples R China

来源：

FERROELECTRICS | 2010年 / 402卷

基金：

中国国家自然科学基金;

关键词：

La1-xSrxFeO3; sol-gel method; dielectric properties; humidity; CATALYTIC PERFORMANCE; ELECTRICAL-PROPERTIES; COMPLEX IMPEDANCE; PEROVSKITE; SENSOR; MICROSTRUCTURE; OXIDATION; OXIDES; FILM;

D O I：

10.1080/00150191003708729

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, single-phase nanocrystalline La1-xSrxFeO3 (x = 0.1, 0.2, 0.3, 0.4 and 0.5) with perovskite structure were prepared by employing sol-gel method. XRD and TEM were used to characterize the materials. Dielectric properties of La1-xSrxFeO3 (x = 0.1, 0.2, 0.3, 0.4 and 0.5) were investigated. The experiments were carried out as a function of Sr doping (0.1 x 0.5) and frequency (10-105 Hz) in different relative humidity (RH) at 25 degrees C. The results revealed that capacitance decreased as the frequency increased, and the peaks of dielectric loss appeared at high relative humidity range. Humidity sensing properties were also studied in this work. It was found that La0.7Sr0.3FeO3 exhibited high humidity sensitivity and small hysteresis from 33% RH to 98% RH.

引用

页码：79 / 88

页数：10

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