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Journal of Materials Science
Erschienen in: Journal of Materials Science 4/2014

01.02.2014

Effect of sintering temperature on phase structure, microstructure, and electrical properties of (K0.5Na0.5)NbO3–(Ba0.6Sr0.4)0.7Bi0.2TiO3 lead-free ceramics

verfasst von: Hualei Cheng, Wancheng Zhou, Hongliang Du, Fa Luo, Dongmei Zhu, Boxi Xu

Erschienen in: Journal of Materials Science | Ausgabe 4/2014

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Abstract

Lead-free 0.98(K0.5Na0.5)NbO3–0.02(Ba0.6Sr0.4)0.7Bi0.2TiO3 (abbreviated as 0.98KNN–0.02BSBT) ceramics were prepared by the conventional solid-state sintering method. Effect of sintering temperature on 0.98KNN–0.02BSBT ceramics was systematically investigated. The frequency dependent dielectric permittivities show that the ceramics sintered at different temperatures are indeed “relaxor-like” ferroelectric ceramics, which possess a diffuse phase transition without a strong frequency dispersion of dielectric permittivity. The diffuseness parameter γ, the comparison of the relaxor behavior based on empirical parameters (ΔT diffuse) and the slimmer P–E hysteresis loops confirm that the “relaxor-like” characteristics of the ceramics are strengthened with increasing sintering temperature. At the optimum sintering temperature, the dielectric permittivity maximum (ɛ max) has a value of approximately 2795 (at 1 KHz), \( \tan \delta \) is lower than 2.5 % and the diffuseness parameter γ = 1.68 at a broad usage temperature range (150–350 °C), which indicate its potential application in high temperature multilayer ceramics capacitor field.
Vorheriger Artikel Dynamics of dysprosium silicide nanostructures on Si(001) and (111) surfaces
Nächster Artikel Fabrication of photonic crystal heterostructures by a simple vertical deposition technique

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Metadaten
Titel
Effect of sintering temperature on phase structure, microstructure, and electrical properties of (K0.5Na0.5)NbO3–(Ba0.6Sr0.4)0.7Bi0.2TiO3 lead-free ceramics
verfasst von
Hualei Cheng
Wancheng Zhou
Hongliang Du
Fa Luo
Dongmei Zhu
Boxi Xu
Publikationsdatum
01.02.2014
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 4/2014
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-013-7870-z

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