TY - JOUR
T1 - Sintering characteristic, microstructure, and dielectric relaxor behavior of (K0.5Na0.5)NbO3-(Bi0.5Na 0.5)TiO3 lead-free ceramics
AU - Du, Hongliang
AU - Zhou, Wancheng
AU - Zhu, Dongmei
AU - Fa, Luo
AU - Qu, Shaobo
AU - Li, Ye
AU - Pei, Zhibin
PY - 2008/9
Y1 - 2008/9
N2 - Highly dense lead-free ceramics (1-x)(K0.5Na0.5) NbO3-x(Bi0.5Na0.5)TiO3 [(1-x)KNN-xBNT] have been synthesized by pressureless sintering owing to the careful control of processing conditions. The densification of (1-x)KNN-xBNT ceramics improves with increasing addition of BNT. The translucence is observed in 0.96 KNN-0.04 BNT ceramics. Diffuse phase transition and frequency dispersion of the dielectric constant, which are two typical characteristics for relaxor ferroelectrics, are observed in (1-x)KNN-xBNT ceramics. Dielectric relaxor behavior obeys a modified Curie-Weiss law. In addition, (1-x)KNN-xBNT ceramics possess a high Curie temperature (>320°C). The results indicate that (1-x)KNN-xBNT (x=0.06) ceramics are promising lead-free candidate relaxor ferroelectrics for high-temperature applications.
AB - Highly dense lead-free ceramics (1-x)(K0.5Na0.5) NbO3-x(Bi0.5Na0.5)TiO3 [(1-x)KNN-xBNT] have been synthesized by pressureless sintering owing to the careful control of processing conditions. The densification of (1-x)KNN-xBNT ceramics improves with increasing addition of BNT. The translucence is observed in 0.96 KNN-0.04 BNT ceramics. Diffuse phase transition and frequency dispersion of the dielectric constant, which are two typical characteristics for relaxor ferroelectrics, are observed in (1-x)KNN-xBNT ceramics. Dielectric relaxor behavior obeys a modified Curie-Weiss law. In addition, (1-x)KNN-xBNT ceramics possess a high Curie temperature (>320°C). The results indicate that (1-x)KNN-xBNT (x=0.06) ceramics are promising lead-free candidate relaxor ferroelectrics for high-temperature applications.
UR - http://www.scopus.com/inward/record.url?scp=51149086058&partnerID=8YFLogxK
U2 - 10.1111/j.1551-2916.2008.02528.x
DO - 10.1111/j.1551-2916.2008.02528.x
M3 - 文章
AN - SCOPUS:51149086058
SN - 0002-7820
VL - 91
SP - 2903
EP - 2909
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 9
ER -