TY - JOUR
T1 - Effect of sintering temperature on phase structure, microstructure, and electrical properties of (K0.5Na0.5)NbO 3-(Ba0.6Sr0.4)0.7Bi 0.2TiO3 lead-free ceramics
AU - Cheng, Hualei
AU - Zhou, Wancheng
AU - Du, Hongliang
AU - Luo, Fa
AU - Zhu, Dongmei
AU - Xu, Boxi
PY - 2014/2
Y1 - 2014/2
N2 - Lead-free 0.98(K0.5Na0.5)NbO3-0.02(Ba 0.6Sr0.4)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 (E∈ max) has a value of approximately 2795 (at 1 KHz), tan δ 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.
AB - Lead-free 0.98(K0.5Na0.5)NbO3-0.02(Ba 0.6Sr0.4)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 (E∈ max) has a value of approximately 2795 (at 1 KHz), tan δ 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.
UR - http://www.scopus.com/inward/record.url?scp=84891635568&partnerID=8YFLogxK
U2 - 10.1007/s10853-013-7870-z
DO - 10.1007/s10853-013-7870-z
M3 - 文章
AN - SCOPUS:84891635568
SN - 0022-2461
VL - 49
SP - 1824
EP - 1831
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 4
ER -