Elaboration and characterization of barium titanate powders obtained by the mechanical activation of barium nitrate and titanate oxide, and electrical properties of the ceramics sintered by SPS

Tawfik Al-Naboulsi; Madona Boulos; Christophe Tenailleau; Pascal Dufour; Mirvat Zakhour; Sophie Guillemet-Fritsch

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자료유형: 학술저널

저자정보: Tawfik Al-Naboulsi (Universit Libanaise) Madona Boulos (Universit Libanaise) Christophe Tenailleau (Université Paul Sabatier) Pascal Dufour (Université Paul Sabatier) Mirvat Zakhour (Universit Libanaise) Sophie Guillemet-Fritsch (Université Paul Sabatier)

저널정보: 한양대학교 세라믹공정연구센터 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제17권 제8호

발행연도: 2016.8

수록면: 870 - 875 (6page)

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The current work aims to reduce the energy required to obtain a high quality barium titanate nanocrystals via solid-statereaction. In order to achieve this challenge, Ba(NO3)2 and TiO2 were mechanically activated by high-energy ball milling, andthen heat treated at moderate temperature (600 oC). When stoichiometric mixture was used, the formation of BT and minorBaCO3 and TiO2 impurities was observed. The use of Ba(NO3)2 excess leads to the formation of BT and a minor BaCO3impurity. A simple acid wash treatment was used to remove the carbonate impurity and to provide a high purity BT. Thepowders were characterized by XRD, BET, Raman spectroscopy, and SEM-FEG. Spark Plasma Sintering (SPS) technique wasused to get the dense nanoceramics. These materials show, at room temperature and at 1 kHz, colossal permittivity (ε = 105)associated with low dielectric loss (tg δ = 0.07).

#Barium titanate #Mechanosynthesis #SPS #Electrical properties

참고문헌 (33)

참고문헌 신청

W. Heywang / 1964 / J. Am. Ceram. Soc 47:484~490

J.M. Herbert / 2003 / Electroceramics: Materials, Properties, Applications / Chapman and Hall

Y. Ohara / 1985 / J. Am. Ceram. Soc 68:C-108~C-109

M. T. Buscaglia / 2005 / J. Am. Ceram. Soc 88:2374~2379

H. Xu / 2004 / Mater. Lett 58:1582~1586

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