Dielectric and Piezoelectric Properties of 0.36BiScO₃ - 0.64PbTiO₃ Ceramic Doped with Calcium Fluoride

Abstract:

BiScO₃-xPbTiO₃ (BS-PT) of perovskite type structure (with x~0.64) were prepared by solid state ceramic process with addition of calcium fluoride (CaF₂) in different molar ratios (0.5, 1.0 and 4.0 mol%). The doped compositions were found to have different symmetry compared with parent material. The 0.5 mol% doped sample was found to possess enhanced rhombohedral phase as compared to other compositions while he Curie temperature (T_c) was not affected appreciably. Small dielectric peaks were observed, indicating phase transition, at temperature lower than T_c in all the samples except 4.0% doped composition. At room temperature doping reduced the loss factor. d₃₃ and P_r reduced rapidly with doping. The characteristics of BS-PT ferroelectric ceramics became harder with the addition of CaF₂.

• Periodical: Key Engineering Materials (Volume 875)
• Pages: 10-14
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.875.10
• Online since: February 2021
• Authors: Khurram Shahzad*, Ghulam Shabbir, Hui Li, Zhen Rong Li
• Keywords: Dielectric Constant, Ferroelectrics, Hysteresis Loop, Piezoelectric Coefficient

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