Dielectric anomalies in stoichiometric Bi.49Er.01Na.5TiO3-K.5Na.5NbO3 ceramics. Issue 8 (1st June 2018)

• Record Type: Journal Article
• Authors: Xing, Hongjie; Zhang, Jingji; Jia, Xuanrui; Pan, Haoli; He, Junyu; Wang, Jiangying; Bai, Wangfeng; Wen, Fei
• Is Part Of: Ceramics international. Volume 44:Issue 8(2018)
• Page Start: 10006
• Page End: 10009
• Publication Date: 2018-06-01
• Subjects: Ferroelectric ceramics -- Lead-free -- Luminescence -- Defects; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.02.199
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: (1- x )Bi.49 Er.01 Na.5 TiO3 - x K.5 Na.5 NbO3 (abbreviated as BENT- x KNN) ceramics have been prepared via solid state reaction technique and their electric properties have been investigated by impedance spectroscopy. X-ray diffraction results show that the incorporation of KNN into BENT forms (Bi.49 Er.01 )1- x K.5 x Na.5 Ti1- x Nb x O3 solid solution with perovskite structure. Dielectric measurements reveal that there exists a diffuse anomaly above permittivity-maximum temperature whether heating or cooling, which exhibits thermal hysteresis at low frequency. It is proposed that the anomaly is probably ascribed to weakly bound electrons trapped in Nb Ti and V O defects based on a piecewise fitting for their conductivity vs. temperature.