TY - JOUR
T1 - Dielectric properties and microstructure of Nb-Co codoped BaTiO 3-(Bi0.5Na0.5)TiO3 ceramics
AU - Hsiang, Hsing I.
AU - Mei, Li Then
AU - Chun, Yi Jih
PY - 2009/11
Y1 - 2009/11
N2 - X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, and an impedance analyzer were used to examine the Nb-Co codoping effects on the densification, crystalline phase, microstructure development, and dielectric-temperature characteristics of BaTiO3-(Bi 0.5Na0.5)TiO3 ceramics. The results indicate that the Curie temperature shifted to a higher temperature (above 140°C) by adding BNT. The dielectric constant-temperature (ε-T) curve broadened at the Curie temperature due to the small grain size (0.3-0.4 μm). A core-shell structure was developed, which is helpful to flatten the ε-T curve of BaTiO3 ceramics at high temperatures.
AB - X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, and an impedance analyzer were used to examine the Nb-Co codoping effects on the densification, crystalline phase, microstructure development, and dielectric-temperature characteristics of BaTiO3-(Bi 0.5Na0.5)TiO3 ceramics. The results indicate that the Curie temperature shifted to a higher temperature (above 140°C) by adding BNT. The dielectric constant-temperature (ε-T) curve broadened at the Curie temperature due to the small grain size (0.3-0.4 μm). A core-shell structure was developed, which is helpful to flatten the ε-T curve of BaTiO3 ceramics at high temperatures.
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U2 - 10.1111/j.1551-2916.2009.03245.x
DO - 10.1111/j.1551-2916.2009.03245.x
M3 - Article
AN - SCOPUS:70350520213
SN - 0002-7820
VL - 92
SP - 2768
EP - 2771
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 11
ER -