Effects of Sb on structure, micro structure and electrical characteristics of Sb-modified (K0.41Na0.59)NbO3 ceramics
Vol. 132 No. 1D (2023), Original Article
Vol. 132 No. 1D (2023)

Effects of Sb on structure, micro structure and electrical characteristics of Sb-modified (K0.41Na0.59)NbO3 ceramics

Original Article
https://doi.org/10.26459/hueunijns.v132i1D.7160
Published 2023-12-30
Le Tran Uyen Tu*
University of Sciences, Hue University, 77 Nguyen Hue, Hue, Vietnam
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Keywords

Lead free ceramics
Sb-doping
Dielectric response
ferroelectrical properties

How to Cite

1.
Le TUT. Effects of Sb on structure, micro structure and electrical characteristics of Sb-modified (K0.41Na0.59)NbO3 ceramics. hueuni-jns [Internet]. 2023Dec.30 [cited 2024Dec.22];132(1D):35-42. Available from: https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/7160
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Abstract

Lead-free (Na0.59K0.41)(Nb1-xSbx)O3 ceramic (x = 0 ÷ 0.12) were prepared by the solid phase reaction method. The influence of Sb concentration on the structure, microstructure and electrical properties of the ceramic was studied. Results indicate that the presence of pure perovskite phase was revealed by XRD patterns recorded for the ceramics, which also showed a shift in structure from orthorhombic to mixed rhombohedral and tetragonal with an increase in x value. At x = 0.06, the ceramics express the best microstructure, the particles were tightly packed with an average particle size of 1.76 µm. The (Na0,59K0,41)(Nb0,94Sb0,06)O3 ceramics have the best dielectric and ferroelectric properties: the ceramic density (r) is 4.48 g/cm3 (relative density: 98.7% of the theoretical value); highest dielectric constant at TC (emax) of 12031; dielectric constant at RT (ε) of 945; low dielectric loss (tanδ) of 0.15; and high remanent polarization (Pr) of 11,2 mC/cm2; and the reactance field (Ec) of 8.7 kV/cm, and the phase transition temperatures (TC) of 372 °C, and (TO-T) of 157 °C.

https://doi.org/10.26459/hueunijns.v132i1D.7160
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