TY - JOUR
T1 - Effect of sintering temperature on the structure and properties of cerium-doped 0.94(Bi0.5Na0.5)TiO3-0.06BaTiO3 piezoelectric ceramics
AU - Liu, Laijun
AU - Fan, Huiqing
AU - Ke, Shanming
AU - Chen, Xiuli
PY - 2008/6/30
Y1 - 2008/6/30
N2 - Phase structure, microstructure, dielectric and piezoelectric properties of 0.4 wt% CeO2 doped 0.94(Bi0.5Na0.5)TiO3-0.06BaTiO3 (Ce-BNT6BT) ceramics sintered in the temperature range from 1120 to 1200 °C have been investigated as a candidate for lead-free piezoelectric ceramics. Tetragonal phase played an important role in improvement of electrical properties and the density of the ceramics. Dielectric constant decreased slightly with the increase of sintering temperature in ferroelectric region but a reverse phenomenon occurred in antiferroelectric and paraelectric regions, suggesting that interfacial polarizations were improved with the increase of sintering temperature and domain walls of ferroelectricity became active after depolarization. At room temperature, Ce-BNT6BT ceramics sintered at 1180 °C showed good performances: dielectric constant was 914 at 1 kHz, thick coupling factor kt was 0.52, and the ratio of kt/kp was 2.3. The ceramics were suitable for narrowband filters and ultrasonic transducers in commercial applications.
AB - Phase structure, microstructure, dielectric and piezoelectric properties of 0.4 wt% CeO2 doped 0.94(Bi0.5Na0.5)TiO3-0.06BaTiO3 (Ce-BNT6BT) ceramics sintered in the temperature range from 1120 to 1200 °C have been investigated as a candidate for lead-free piezoelectric ceramics. Tetragonal phase played an important role in improvement of electrical properties and the density of the ceramics. Dielectric constant decreased slightly with the increase of sintering temperature in ferroelectric region but a reverse phenomenon occurred in antiferroelectric and paraelectric regions, suggesting that interfacial polarizations were improved with the increase of sintering temperature and domain walls of ferroelectricity became active after depolarization. At room temperature, Ce-BNT6BT ceramics sintered at 1180 °C showed good performances: dielectric constant was 914 at 1 kHz, thick coupling factor kt was 0.52, and the ratio of kt/kp was 2.3. The ceramics were suitable for narrowband filters and ultrasonic transducers in commercial applications.
KW - Ceramics
KW - Electronic properties
KW - Sintering
KW - Solid-state reaction
UR - http://www.scopus.com/inward/record.url?scp=42949150606&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2007.04.037
DO - 10.1016/j.jallcom.2007.04.037
M3 - 文章
AN - SCOPUS:42949150606
SN - 0925-8388
VL - 458
SP - 504
EP - 508
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 1-2
ER -