Electrical characterization of zirconium substituted barium titanate using complex impedance spectroscopy

Bulletin of materials science

Priyanka¹  A K Jha² 

[1] Department of Applied Physics, Delhi Technological University (Formerly Delhi College of Engineering), Bawana Road, Delhi 110 042, India$$Department of Applied Physics, Delhi Technological University (Formerly Delhi College of Engineering), Bawana Road, Delhi 110 042, IndiaDepartment of Applied Physics, Delhi Technological University (Formerly Delhi College of Engineering), Bawana Road, Delhi 110 042, India$$;Department of Applied Sciences, Ambedkar Institute of Technology (GGSIPU), Geeta Colony, Delhi 110 092, India$$Department of Applied Sciences, Ambedkar Institute of Technology (GGSIPU), Geeta Colony, Delhi 110 092, IndiaDepartment of Applied Sciences, Ambedkar Institute of Technology (GGSIPU), Geeta Colony, Delhi 110 092, India$$

关键词: Ferroelectrics;    barium zirconate titanate;    complex impedance spectroscopy.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

This paper reports complex impedance analysis of polycrystalline complex perovskite structured BaZr_0.025Ti_0.975O₃ prepared by solid state reaction method. XRD analysis reveals the formation of single phase perovskite structure. SEM has been used to investigate grain morphology of the material. Impedance plots have been used as a tool to analyse electrical properties of the sample as a function of frequency and temperature. Bulk resistance is observed to decrease with an increase in temperature showing a typical negative temperature coefficient of resistance (NTCR) type behaviour. Nyquist (Coleâ€�?�Cole) plots show both inter and intra grain boundary effects. Relaxation time is found to decrease with increasing temperature and it obeys the Arrhenius relationship. The variation of d.c. and a.c. conductivity as a function of temperature is also reported.

【 授权许可】

Unknown