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Phase structure, microstructure, electrical and energy storage properties of SBNLT lead free ceramics with Zr4+ substituted into B-sites
Author(s)
Sinkruason, Thanapon
Luangpangai, Anupong
Julphunthong, Phongthorn
Rittidech, Aurawan
Pulphol, Phieraya
Bongkarn, Theerachai
Date Issued
September 1, 2024
Type
Article
Abstract
Lead-free (Sr0.3Bi0.35Na0.335Li0.015) (Ti1−xZrx) O3 ceramics (SBNLT1−xZrx) with x = 0–0.04 were prepared via the solid-state combustion technique using glycine as the fuel. The influence of Zr content on the phase structure, microstructure, electrical properties, and energy storage properties of the SBNLT1−xZrx ceramics was examined. The presence of a pure perovskite phase was shown by X-ray diffraction (XRD) patterns, with the coexistence of rhombohedral and tetragonal phases in all samples, as certified by the Rietveld refinement method. Scanning electron microscopy (SEM) was utilized to observe the morphology of the SBNLT1−xZrx ceramics, which revealed cube shaped grains with anisotropic growth. Average grain size increased from 2.01 to 2.49 µm when x increased from 0 to 0.01 and then reduced with further increases in Zr content. The maximum dielectric constant dropped from 4667 to 2990 when x increased from 0 to 0.04, caused by a shift from the morphotropic phase boundary (MPB). The maximum polarization (Pmax) of 29.18 µC/cm2, energy storage density (Wtotal) of 0.851 J/cm3 and recoverable energy storage (Wrec) of 0.609 J/cm3 were achieved when x = 0.02.
Citation
Journal of the Korean Ceramic Society, 61(5), 861-871, 2024