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J. Korean Ceram. Soc. > Volume 39(2); 2002 > Article
Journal of the Korean Ceramic Society 2002;39(2): 159.
doi: https://doi.org/10.4191/kcers.2002.39.2.159
Modified Mixed Oxide 방법에 의한 PMN-PT-BT 분말 합성 및 그의 물성에 미치는 Ag의 영향
임경란, 정순용, 김창삼
한국과학기술연구원 재료연구부
Preparation of PMN-PT-BT Powder by Modified Mixed Oxide Method and Effect of Ag on Dielectric Properties
Kyoung-Ran Lim, Soon-Yong Jeong, Chang-Sam Kim
Division of Materials Science and Engineering, KIST
ABSTRACT
A single phase perovskite relaxor ferroelectric PMN-PT-BT was prepared by a single calcination and the modified mixed oxide process. It was accomplished by ball-milling PbO, $Nb_2O_5,;Ti(OC_3H_7)_4,;BaCO_3,;and;Mg(NO_3)_2$ instead of MgO, removing the solvent, and then followed by calcination at 900$^{circ}C$ for 2h. The specimen sintered at 1100$^{circ}C$/2h showed the sintered density of 7.83 g/$cm^3$, room temperature dielectric constant of 22000, and dielectric loss of 2.5%. Addition of 1.0 mole% (0.3 wt%) of Ag as $AgNO_3$ and followed by calcination at 550$^{circ}C$/2h lowered the sintering temperature to 900$^{circ}C$. It still showed the sintered density of 7.88 g/$cm^3$, room temperature dielectric constant of 20000 and dielectric loss of 2.4%.
Key words: PMN-PT-BT, Perovskite, Single-calcination, Ag, Low-temperature-sinterable, Low dielectric loss
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