IMPEDANCE AND MODULUS SPECTROSCOPY CHARACTERIZATION OF SODIUM-BISMUTH TITANATE-BASED LEAD-FREE FERROELECTRIC MATERIALS

作     者：DHANANJAY K.SHARMA RAJU KUMAR RADHESHYAM RAI SEEMA SHARMA ANDREI L.KHOLKIN 

作者机构：Ferroelectric Research LaboratoryDepartment of Physics A N CollegePatna 800013India Department of Ceramics and Glass Engineering and CICECO University of Aveiro3810-193AveiroPortugal 

出 版 物：《Journal of Advanced Dielectrics》 (先进电介质学报（英文）)

年 卷 期：2012年第2卷第1期

页      面：48-58页

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

主　　题：Ceramics X-ray diffraction piezoelectricity perovskite dielectric properties 

摘      要：In this paper,we present impedance spectroscopy of Sodium Bismuth Titanate-based materials belonging to(1-x)TNa_(1/2)Bi_(1/2)TiO_(3)-xBaTiO_(3)(x=0.04)(NBT-BT)***-BT ceramics are prepared by high temperature solid-state reaction method.X-ray diffraction technique showed single-phase polycrystalline sample with an ABO3 perovskite *** behavior and the impedance relaxation were investigated in a wide range of temperature(room temperature(RT)-500℃)and frequency(1 kHz-1 MHz).A broad dielectric constant peak was observed over a wide temperature range around the phase transition *** complex impedance plot exhibited one impedance semicircle identified over the frequency range of 1 kHz-1MHz,which is explained by the grain effect of the *** centers of the impedance semicircles lie below the real axis,which indicates that the impedance response is a Cole-Cole type relaxation.