期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 34, 期 15, 页码 3685-3697出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2014.04.040
关键词
Solid state reaction; BNT-BKT; Thermoanalysis; XRD at high temperature
资金
- EPCOS OHG
- TDK-EPC Corporation
- Christian Doppler Association, Austria
- Ministry of Science, Research and Economy, Austria
Various compositions of the solid solution system (100-x) Bi0.5Na0.5TiO3-xBi(0.5)K(0.5)TiO(3) (x=0, 10, 25, 50, 75, 90, 100) were prepared by the mixed oxide route. The formation reaction was analyzed by thermogravimetry coupled with mass spectroscopy and differential scanning calorimetry. In situ high temperature X-ray diffraction up to 770 degrees C indicated emerging and vanishing of phases during the calcination. Intermediate phases such as alkalipolytitanate (Na/K)(2)Ti6O13 and bismuth titanate Bi2Ti2O7 were identified as forming the perovskite phase. The formation reactions were proposed based on the data obtained. Furthermore the microstructure and the dielectric behavior of the sintered samples were observed by scanning electron microscopy, impedance spectrometry and polarization measurements. (C) 2014 Elsevier Ltd. All rights reserved.
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