Electrical Properties of Bismuth-Layered Structural Ca_xSr_2-xBi₄Ti₅O₁₈ Ceramics

Abstract:

Effects of amount of Ca on crystal structure, microstructure, ferroelectric properties, and dielectric properties of the CaxSr2-xBi4Ti5O18 (CSBTi-x) ferroelectric ceramics were investigated. The results show that single-phase layered perovskite ferroelectrics were obtained and no appreciable secondary phase was found.Ca-doping results in a notable enlargement of remnant polarization 2Pr. The 2Pr of CSBT-0.15 reaches a large value, the remnant polarization 2Pr and coercive field 2Ec were 18.1µC/cm2 and 120.2kV/cm, respectively. Dielectric constant and dielectric loss of CSBT-0.15 was also measured, showing dielectric constant εr=199~194 and dielectric loss tanδ=0.02~0.014 over the range of 100 kHz~1MHz, respectively.

• Periodical: Advanced Materials Research (Volumes 105-106)
• Pages: 282-285
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.105-106.282
• Online since: April 2010
• Authors: Su Hua Fan, Feng Qing Zhang, Q.D. Che, R. Yu, W. Hu, Qing Bo Tian
• Keywords: Ca_xSr_2-xBi₄Ti₅O₁₈, Ferroelectric Ceramics, Remnant Polarization

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