Complex impedance properties of LiSr_(2)Nb_(5)O_(15) ceramic  

作　　者：N.K.MOHANTY S.K.SATPATHY Banarji BEHERA P.NAYAK R.N.P.CHOUDHARY 

机构地区：[1]School of Physics,Materials Research Laboratory,Sambalpur University,Jyoti Vihar,Burla-768019,Odisha,India [2]Department of Physics,ITER,S.O.A.University,Bhubaneswar-751030,Odisha,India

出　　处：《Journal of Advanced Ceramics》2012年第3期221-226,共6页先进陶瓷（英文）

基　　金：The authors(PN and BB)acknowledge the financial support through DRS-I under SAP of UGC for the development of research work in the School of Physics,SU.

摘　　要：The polycrystalline sample of LiSr2Nb5O15(LSN)was prepared by a high-temperature solid state reaction technique.The impedance parameters were studied using an impedance analyzer in a wide range of frequencies(102-106 Hz)at different temperatures(28-500℃).Nyquist plot reveals the presence of bulk effect only.The bulk resistance of the compound decreases with rise in temperature which shows the negative temperature coefficient of resistance(NTCR)like a semiconductor.The ac conductivity spectrum was found to obey Jonscher’s universal power law.DC conductivity(bulk)with temperature demonstrates that the compound exhibits Arrhenius type of electrical conductivity and the activation energy found to be 0.97 eV.

关 键 词：NIOBATES CONDUCTIVITY complex impedance MODULUS 

分 类 号：TG1[金属学及工艺—金属学]