TY - JOUR
T1 - Microstructure and piezoelectric properties of 0.95(Na0.5K 0.5)NbO3-0.05SrTiO3 ceramics
AU - Cho, Kyung Hoon
AU - Park, Hwi Yeol
AU - Ahn, Cheol Woo
AU - Nahm, Sahn
AU - Uchino, Kenji
AU - Park, Seung Ho
AU - Lee, Hyeung Gyu
AU - Lee, Hwack Joo
PY - 2007/6/1
Y1 - 2007/6/1
N2 - The 0.95(Na0.5K0.5)NbO3-0.05SrTiO3 (0.95NKN-0.05ST) ceramics formed in this study had a porous microstructure with small grains and low piezoelectric properties due to their low density. However, when a small amount of Na2O was intentionally subtracted from the 0.95NKN-0.05ST ceramics, a liquid phase was formed, which led to increased density and grain size. Piezoelectric properties were also improved for the Na2O-subtracted 0.95NKN-0.05ST ceramics. The increased density and grain size were responsible for the enhancement of the piezoelectric properties. In particular, the 0.95(Na0.49K0.5)NbO2.995-0.05ST ceramics showed high piezoelectric properties of d33=220, kp=0.4, Qm=72, and ε3T/εo=1447, thereby demonstrating their promising potential as a candidate material for application to lead-free piezoelectric ceramics.
AB - The 0.95(Na0.5K0.5)NbO3-0.05SrTiO3 (0.95NKN-0.05ST) ceramics formed in this study had a porous microstructure with small grains and low piezoelectric properties due to their low density. However, when a small amount of Na2O was intentionally subtracted from the 0.95NKN-0.05ST ceramics, a liquid phase was formed, which led to increased density and grain size. Piezoelectric properties were also improved for the Na2O-subtracted 0.95NKN-0.05ST ceramics. The increased density and grain size were responsible for the enhancement of the piezoelectric properties. In particular, the 0.95(Na0.49K0.5)NbO2.995-0.05ST ceramics showed high piezoelectric properties of d33=220, kp=0.4, Qm=72, and ε3T/εo=1447, thereby demonstrating their promising potential as a candidate material for application to lead-free piezoelectric ceramics.
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U2 - 10.1111/j.1551-2916.2007.01715.x
DO - 10.1111/j.1551-2916.2007.01715.x
M3 - Article
AN - SCOPUS:34249850753
VL - 90
SP - 1946
EP - 1949
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 6
ER -