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Journal of Materials Science: Materials in Electronics
Published in: Journal of Materials Science: Materials in Electronics 5/2017

19-11-2016

Hot-press sintering Sr2Nb2O7 ceramics and their electrical properties

Authors: Xin Cai, Yuancheng Teng, Lang Wu, Kuibao Zhang

Published in: Journal of Materials Science: Materials in Electronics | Issue 5/2017

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Abstract

Sr2Nb2O7 ceramics with high densities were synthesized by the hot-press sintering process, and the effects of sintering temperature and holding time of phase composition and microstructure were studied. The dielectric, piezoelectric, and ferroelectric properties of Sr2Nb2O7 ceramics were also investigated. A relative density of 98% was obtained when the Sr2Nb2O7 ceramics were prepared by hot-pressing (30 MPa) at temperature as low as 1200 °C for 2 h. The grain size of Sr2Nb2O7 increases gradually with the variation of temperature from 1150 to 1200 °C. The grains are plate-like and the length of grain size is 15 µm when the temperature increased to 1200 °C. In addition, the grain boundary became unclear at 1300 °C for 2 h. The dielectric constant and dielectric loss of the ceramics sintered at 1200 °C for 2 h were 57 and 1.6% at 10 kHz, respectively. The piezoelectric constant reached 2.1 pC/N. The remanent polarization and the coercive field were 0.24 µC/cm2 and 15.1 kV/cm, respectively.
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Metadata
Title
Hot-press sintering Sr2Nb2O7 ceramics and their electrical properties
Authors
Xin Cai
Yuancheng Teng
Lang Wu
Kuibao Zhang
Publication date
19-11-2016
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 5/2017
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-016-6046-4

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