Dielectric,ferroelectrics properties and impedance spectroscopy analysis of the[(Na_(0.535)K_(0.480))_(0.966)Li_(0.058)](Nb_(0.90)Ta_(0.10))O_(3)-based lead-free ceramics

作     者：M.Saidi A.Chaouchi S.D'Astorg M.Rguiti C.Courtois 

作者机构：Laboratoire de Chimie Appliquée et Génie Chimique de l'UniversitéMouloud Mammeri de Tizi-OuzouAlgérie Laboratoire des Matériau Céramiques et Procédés Associés—Universitéde Valenciennes et du Hainaut-Cambrésis Boulevard Charles de Gaull59600 MaubeugeFrance University of Lille Nord de France F-59000 LilleFrance 

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

年 卷 期：2015年第5卷第1期

页      面：50-56页

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

主　　题：Lead-free piezo-ceramics dielectric properties AC impedance spectroscopy dielectric relaxation conductivity 

摘      要：Polycrystalline of[(Na_(0.535)K_(0.480))_(0.966)Li_(0.058)](Nb_(0.90)Ta_(0.10))O_(3)samples were prepared using the high-temperature solid-state reaction technique.X-ray diffraction(XRD)analysis indicates the formation of a single-phase with orthorhombic *** impedance plots were used as tool to analyze the electrical behavior of the sample as a function of frequency at different *** AC impedance studies revealed the presence of grain effect,from 425℃*** impedance analysis indicated non-Debye type dielectric *** Nyquist plot showed the negative temperature coefficient of resistance(NTCR)characteristic of *** AC conductivity results were used to correlate with the barrier hopping(CBH)model to evaluate the binding energy(W_(m)),the minimum hopping distance(R_(min)),the density of states at Fermi level(N(E_(f))),and the activation energy of the compound.