Volume 215, Issue 20 1701023
Original Paper

Ferroelectric, Piezoelectric and Dielectric Behaviors of CoO- and Fe2O3-Doped BCZT Ceramics

Piyaporn Jaimeewong

Piyaporn Jaimeewong

Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

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Satapond Sittinon

Satapond Sittinon

Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

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Suwapitcha Buntham

Suwapitcha Buntham

Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

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Pornsuda Bomlai

Pornsuda Bomlai

Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90112, Thailand

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Orapim Namsar

Orapim Namsar

School of Ceramic Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand

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Soodkhet Pojprapai

Soodkhet Pojprapai

School of Ceramic Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand

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Anucha Watcharapasorn

Corresponding Author

Anucha Watcharapasorn

Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

Center of Excellence in Materials Science and Technology, Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

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First published: 21 May 2018
Citations: 19

Abstract

This study investigates the effect of CoO and Fe2O3 dopant on phase, microstructure and ferroelectric properties of BCZT ceramics with the formula of Ba0.85Ca0.15Zr0.1(Ti1-xCox)0.9O3 and Ba0.85Ca0.15Zr0.1(Ti1-xFex)0.9O3 where x = 0, 0.01, and 0.03. The XRD patterns presented that the pure perovskite phases are observed regardless of the amount of CoO and Fe2O3 added. Rietveld analysis shows that the tetragonal phase is observed in all patterns and the unit cell volume slightly expanded by the CoO addition while it is distorted with increasing Fe2O3 addition. The average grain sizes decreased upon CoO and Fe2O3 addition. It is found that the doping of CoO and Fe2O3 caused the transition temperature to shift to lower temperature. The optimum ferroelectric and dielectric properties can be achieved for the BCZT-0.01Co ceramics. This study shows that while small doping with Co and Fe can enhance different properties of BCZT with lower processing temperature, the properties should be further optimized by chemical modification.

Conflict of Interest

The authors declare no conflict of interest.

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