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Journal of Materials Science: Materials in Electronics
Published in: Journal of Materials Science: Materials in Electronics 8/2013

01-08-2013

Microstructures and dielectric properties of Ba[(Co0.7Zn0.3)1/3Nb2/3]O3-based ceramics prepared by aqueous gelcasting-assisted solid-state method

Authors: Man Li, Wenzhong Lu, Wen Lei, Xiaohong Wang, Jiamin Wu

Published in: Journal of Materials Science: Materials in Electronics | Issue 8/2013

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Abstract

The aqueous gelcasting-assisted solid-state method (AGAS) and traditional solid-state reaction method (TSSR) were used to prepare Ba[(Co0.7Zn0.3)1/3Nb2/3]O3 (BCZN)-based ceramics. The effects of different powder-preparation methods on the microstructures and dielectric properties of the BCZN-based ceramics were investigated. X-ray diffraction analysis showed completely the same phase compositions regardless of the preparation method adopted. The relative permittivity (ε r) did not significantly vary between the two methods. However, BCZN with CeO2-added ceramics prepared by AGAS had higher and more uniform density (6.374 g/cm3) and high quality factor of resonant frequency (Q × f) value (75,843 GHz) than those prepared by TSSR because of the more uniform microstructures, as shown by scanning electron microscopy images. The temperature coefficients of resonant frequency (τ f  = 7.4 ppm/°C) of the ceramics prepared by AGAS were also closer to zero than those prepared by TSSR.
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Metadata
Title
Microstructures and dielectric properties of Ba[(Co0.7Zn0.3)1/3Nb2/3]O3-based ceramics prepared by aqueous gelcasting-assisted solid-state method
Authors
Man Li
Wenzhong Lu
Wen Lei
Xiaohong Wang
Jiamin Wu
Publication date
01-08-2013
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 8/2013
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-013-1154-x

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