Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23670
Title: Colossal dielectric response in barium iron niobate ceramics obtained by different precursors
Authors: Ke, S
Huang, H 
Fan, H
Chan, HLW 
Zhou, LM 
Keywords: Grain size
BFN
Colossal dielectric constant
Capacitors
Issue Date: 2008
Publisher: Pergamon Press
Source: Ceramics international, 2008, v. 34, no. 4, p. 1059-1062 How to cite?
Journal: Ceramics international 
Abstract: Ba(Fe0.5Nb0.5)O3 (BFN) ceramics were synthesized by a traditional mixed oxide method (BFN-M), as well as a columbite method (BFN-C) with FeNbO4 precursor. X-ray diffraction reveals that both the ceramics and precursor have a pure monoclinic phase. BFN-C samples showed improved microstructure with less pores and smaller grain size. Dielectric properties of the BFN ceramic were characterized in a broad frequency range (0.1 Hz to 10 MHz) and a temperature range from -120 to 300 °C. A Debye-like relaxation was found in a low-frequency range, where a high-temperature dielectric anomaly was observed too. The relative low-dielectric loss suggests that columbite method should be a better choice for the synthesis of A(Fe0.5B0.5)O3 ceramics.
URI: http://hdl.handle.net/10397/23670
ISSN: 0272-8842
EISSN: 1873-3956
DOI: 10.1016/j.ceramint.2007.09.079
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