Publication:
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

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Issued Date

2022

Resource Type

Article

Language

eng

File Type

application/pdf

ISSN

10584587

DOI

10.1080/10584587.2021.1961533

Rights Holder(s)

มหาวิทยาลัยศรีนครินทรวิโรฒ

Bibliographic Citation

Journal of Culinary Science and Technology. Vol 20, No.3 (2022), p.278-292

Suggested Citation

Pattanakasem W., Yotthuan S., Charoonsuk T., Chootin S., Bongkarn T. 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. Journal of Culinary Science and Technology. Vol 20, No.3 (2022), p.278-292. doi:10.1080/10584587.2021.1961533 Retrieved from: https://hdl.handle.net/20.500.14740/9183

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

Author(s)

Pattanakasem W.
 Yotthuan S.
 Charoonsuk T.
 Chootin S.
 Bongkarn T.

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.

Subject(s)

Dielectric properties
 Microstructure
 Phase formation
 Rietveld refinement
 Solid state combustion method

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URI

https://hdl.handle.net/20.500.14740/9183

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Scopus: Year 2022

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