Study of the Dielectric Properties of Lead-Free Perovskite Ba(Fe[sub 1∕2]Ta[sub 1∕2])O[sub 3] and Ba(Bi[sub 1∕2]Ta[sub 1∕2])O[sub 3] Ceramics

Amodini Mishra,K S Ojha,R N P Choudhary,K N Singh,P K Bajpai,S N Choudhary,K Prasad

doi:10.1063/1.3644441

Study of the Dielectric Properties of Lead-Free Perovskite Ba(Fe[sub 1∕2]Ta[sub 1∕2])O[sub 3] and Ba(Bi[sub 1∕2]Ta[sub 1∕2])O[sub 3] Ceramics

Amodini Mishra, K S Ojha + Show 5 more

https://doi.org/10.1063/1.3644441

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Publication Date: Jan 1, 2011

#Conventional Solid State Reaction Technique #High Value Of Dielectric Constant + Show 8 more

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Abstract

Lead‐free complex perovskite ceramics Ba(Fe1/2Ta1/2)O3 and Ba(Bi1/2Ta1/2)O3 were synthesized using conventional solid state reaction technique. The crystal symmetry, space group and unit cell dimensions were determined from the experimental results using FullProf software. XRD analysis of the compound indicated the formation of a single‐phase cubic structure with the space group Pm3m. A very high value of dielectric constant (∼104) was observed for Ba(Fe1/2Ta1/2)O3 while for Ba(Bi1/2Ta1/2)O3 it is 639. The correlated barrier hopping (CBH) model was employed to successfully explain the mechanism of charge transport in Ba(Fe1/2Nb1/2)O3 and Ba(Bi1/2Ta1/2)O3.

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