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Phase formation and electrical properties of SBNLT ceramics prepared via combustion technique
Author(s)
Sinkruason, Thanapon
Luangpangai, Anupong
Charoenthai, Nipaphat
Rittidech, Aurawan
Pulphol, Phieraya
Bongkarn, Theerachai
Date Issued
January 1, 2023
Type
Article
Abstract
This report investigates the effect of firing temperatures on the phase formation, microstructure, electrical, and energy storage properties of lead-free Sr0.3(Bi0.7Na0.67Li0.03)0.5TiO3 (SBNLT) ceramics, synthesised by combustion technique. The samples were calcined between 700°C and 900°C for 2 h and sintered between 1100°C and 1200°C for 2 h. The ceramics exhibited coexisting rhombohedral and tetragonal phases, which were confirmed by the Rietveld refinement technique. A morphotropic phase boundary (MPB) of the rhombohedral and tetragonal phases, with a ratio of 49:51, was obtained at the sintering temperature of 1175°C. The highest maximum dielectric constant (ε max= 4667), polarisation (P max= 28.80 µC/cm2) and energy density (W = 0.95 J/cm3), with a breakdown strength of 70 kV/cm, were achieved from the sample sintered at 1175°C.
Citation
Materials Science and Technology United Kingdom, 39(18), 3065-3075, 2023