Study of the structural and electrical behavior of Bi(Mg,Ti)O_(3)modified(Ba,Ca)TiO_(3)ceramics  

作　　者：Md.Kashif Shamim Seema Sharma Arpana Singh Radheshyam Rai Rashmi Rani 

机构地区：[1]Ferroelectric Research Laboratory,Department of Physics A.N.College,Patna 800013,India [2]School of Physics and Materials Science,Shoolini University Solan,Himachal Pradesh,India

出　　处：《Journal of Advanced Dielectrics》2016年第4期72-80,共9页先进电介质学报（英文）

摘　　要：The ability of BaTiO_(3)to form solid solutions with different dopants(both iso-and aliovalent)makes it versatile for various applications.In the present study,(Ba,Ca)TiO_(3)(BCT)is modified with Bi(MgTi)O_(3)(BMT)in search for new lead-free ferroelectric material and improve their properties.For this purpose,BCT acts as a main base material and BMT acts as a modifier to fabricate a multifunctional material.In this study,we report the structural and electrical properties of lead free piezo-ceramics(1-x)(Ba_(0.8)Ca_(0.2))TiO_(3–x)Bi(Mg_(0.5)Ti_(0.5))O_(3)with x=0.2,0.4,0.5 prepared by solid-state sintering technique.Single perovskite phase with tetragonal structure is obtained for all the compositions,which is reconfirmed by the Raman Spectroscopic study.Dielectric study confirm the temperature stable behavior of the dielectric permittivity values above 300℃.The dielectric constant value decreases with increase in BMT doping content.Impedance Spectroscopic study confirms non-Debye type dielectric relaxation in the specimen.The Nyquist plot and conductivity studies show the negative temperature coefficient of resistance behavior(NTCR)of the samples.

关 键 词：PEROVSKITE Raman analysis non-Debye type XRD ferroelectrics. 

分 类 号：TB3[一般工业技术—材料科学与工程]