Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 6, Pages 7241-7246Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.01.068
Keywords
Dielectric properties; BiFeO3 ceramic; Microwave absorption
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Funding
- National Natural Science Foundation of PR China [51132002, 50972014, 51072024, 51102007]
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Single-phase multiferroic BiFeO3 nanoparticles were synthesized by the sol gel method. Their dielectric properties are investigated in the temperature range of 373-773 K at frequencies 12.4-18 GHz. Multiferroic BiFeO3 shows high dielectric loss and a strong positive temperature dependence of dielectric properties. The average real and imaginary permittivities of BFO increase from 15.5 and 5.5 to 21.8 and 11.4, respectively. The high dielectric loss below 773 K is ascribed to the defect relaxation loss rather than the leakage current conventionally considered. The calculated attenuation results suggest that BFO nanoparticle is a promising microwave absorber at high temperatures. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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