NDLI: Dielectric properties and relaxor behavior of Ba0.67Sr0.33TiO3-CaBi4Ti4O15 ceramics

Content Provider	IEEE Xplore Digital Library
Author	Jing Xu Han Xing Liu Bo He Hua Hao Ming He Cao
Copyright Year	2012
Description	Author affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luo Shi Road, Wuhan 430070, China (Jing Xu; Han Xing Liu; Hua Hao; Ming He Cao) \|\| Department of Applied Physics, Donghua University, 2999 Renmin North Rd., Songjiang District, Shanghai 201620, China (Bo He)
Abstract	(1−x)Ba0.67Sr0.33TiO3(BST)+xCaBi4Ti4O15(CBT) (x=0, 2%, 4%, 6% and 8%) lead-free relaxor ferroelectric ceramics with submicro grain size of about 200nm were prepared by solidstate reactions. Structure and dielectric properties of BST-CBT have been investigated. X-ray diffraction patterns show a relative low degree of solubility as a result of coupled substitutions of $Bi^{3+}$ and $Ca^{2+}$ both on the A site and the specific structure of CBT. The temperature and frequency dependences of the dielectric constant indicate a crossover from a normal ferroelectric to relaxor behavior. The degrees of diffuseness and relaxor behavior are found to increase with the increasing amount of CBT. The frequency dependence of the temperature of dielectric peak Tm can be well described by Vogel-Fulcher relation. The activation energy Ea increases with x increasing, indicating the more and more energy for the polarization reversal of micropolar regions, which is associated with the enhanced interactions of polar domains.
Starting Page	1
Ending Page	5
File Size	781130
Page Count	5
File Format	PDF
ISBN	9781467326681
e-ISBN	9781467326698
DOI	10.1109/ISAF.2012.6297805
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-09
Publisher Place	Portugal
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ceramics Dielectrics Relaxor ferroelectrics Solids Temperature Temperature dependence Activation energy Lead-free Relaxor ferroelectric Vogel-Fulcher
Content Type	Text
Resource Type	Article

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