EFFECT OF Ca CONCENTRATION SUBSTITUTING FOR Ba ON STRUCTURE AND FERROELECTRIC PROPERTIES OF BZT-BCT MATERIAL

Nguyen Van Khien

Abstract


In this paper, we report the effect of Ca substitution on the structure and ferroelectric properties of BaZr0.2Ti0.8O3-Ba1-xCaxTiO3 (BZT-BCT). The BZT-BCT samples were synthesized by solid state reaction method. The X-ray results indicate that a phase structure competition appears in the Ca-substituted samples. Based on the hysteresis loops measured by Sawyer – Towermethod, we calculated the Ec and Pr values with the extreme value reaching 29.6 %. The ferroelectric properties of BZT-BCT materialstrongly depend on Ca concentration. The results may be related to a pinning effect concerning with the phase-structured competition in the material.


Keywords


BZT-BCT, substitution, ferroelectric, phase structure competition.

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DOI: https://doi.org/10.15625/2525-2518/56/1A/12508

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Published by Vietnam Academy of Science and Technology