Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/27126
Title: Effect of La2O3 Doping on Phase Formation, Microstructure and Electrical Properties of (K0.44Na0.52Li0.04)(Nb0.84Ta0.10Sb0.06)O3 Ceramics Synthesized via the Solid-State Combustion Method
Authors: Pattanakasem W.
Yotthuan S.
Charoonsuk T.
Chootin S.
Bongkarn T.
Keywords: dielectric properties
microstructure
Phase formation
Rietveld refinement
solid state combustion method
Issue Date: 2022
Publisher: Taylor and Francis Ltd.
Abstract: In this work, the effect of La2O3 doping (x = 0–1.6 wt%) on the phase formation, microstructure and electrical properties of (K0.44Na0.52Li0.04)(Nb0.84Ta0.10Sb0.06)O3 (KNLNTS) ceramics was investigated. These samples were fabricated by the solid-state combustion method using glycine as fuel. The KNLNTS ceramics doping with La2O3 powders were calcined and sintered at 750 °C and between 1100 and 1200 °C, respectively, for 2 h. From the X-ray diffraction (XRD) results, the ceramics had a pure perovskite phase with coexisting orthorhombic and tetragonal phases in all samples. The Rietveld refinement analysis suggested that the tetragonality increased with increasing La2O3 doping. The grain morphology of the ceramics exhibited a rather square shape. The average grain size and the density of the ceramics tended to decrease from 1.5 to 0.7 µm and 4.71 to 4.56 g/cm3, respectively, when increasing La2O3 contents from 0 to 1.6 wt%. The dielectric behavior of the ceramics degenerated with La2O3 doping. A decrease in the leakage current and saturated hysteresis loops were observed in the samples doped with La2O3 ≥ 0.8 wt%. © 2021 Taylor & Francis Group, LLC.
URI: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129939685&doi=10.1080%2f10584587.2021.1961533&partnerID=40&md5=9abdee559e663c477fa9ad61fa90cfb8
https://ir.swu.ac.th/jspui/handle/123456789/27126
ISSN: 10584587
Appears in Collections:Scopus 2022

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