The Evolution of Phase, Microstructure and Electrical Properties of BZT–BCT–BLT Ceramic

Abstract

(1 – x)[0.50Ba(Zr_0.20Ti_0.80)O₃–0.50(Ba_0.70Ca_0.30)TiO₃] – xBi_0.50Li_0.50TiO₃ with x = 0, 0.02, 0.04, 0.06, 0.08 and 0.10 wt.% were prepared by a solid-state reaction method. The phase structure, microstructure, dielectric, ferroelectric and energy density properties of BZT–BCT–xBLT ceramics were investigated. The phase structure of the samples showed coexist phases between orthorhombic and tetragonal morphotropic phase boundary (MPB). The grain size morphology decreased with increased of x(BLT) contents. The diffuseness coefficient (γ) of ceramics are between 1.40 and 1.68, which showed the relaxor ferroelectric behavior in all the samples. The dielectric constant (ε_r ∼ 12,697) at 1 kHz can be improve with increased of x(BLT) = 0.02 wt.%. The highest recoverable energy-storage density (W_rec= 0.069 J/cm³) with an excellent energy storage efficiency (η = 95.8%) under lower electric field of 20 kV/cm were found in the composition of x = 0.08 wt.%).

Keywords:

• BZT–BCT–BLT
• microstructure
• ferroelectric properties
• energy density properties

Additional information

Funding

This work was financially supported by the National Research Council of Thailand (NRCT) through Pibulsongkram Rajabhat University (Grant no. RDI-1-61-6-15). NT would like to thank the Faculty of Science and Technology, Pibulsongkram Rajabhat University is also supported. This work was supported financially by The National Science, Research and Innovation Fund (NSRF) through Pibulsongkram Rajabhat University (RDI-1-64-6). NT would like to thank the Faculty of Science and Technology, Pibulsongkram Rajabhat University is also supported.