Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 71, Issue 9, Pages 1329-1336Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2010.05.016
Keywords
Inorganic compounds; Electrical properties
Funding
- CNPq
- CAPES
- FUNCAP
- US Air Force Office of Scientific Research (AFOSR) [FA9550-06-1-0543, FA9550-08-1-0210]
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In this paper we studied the effects of Bi2O3 and PbO addition on BiFeO3 (BFO) ceramic matrix. The structural, dielectric and magnetic properties of fifteen BFO samples were discussed in view of possible applications in RF and microwave devices. The present work also reports the preparation of the samples. Polyvinyl alcohol (PVA) and tetraethyl orthosilicate (TEOS) were also added as a binder in the fabrication procedure. The samples have been studied by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and magnetic hysteresis measurements. Further, a study based on impedance spectroscopy also has been done. Dielectric permittivity (epsilon') and dielectric loss (tan delta) were measured at room temperature in the frequency range 100 Hz-10 MHz, as well as a.c. conductivity. The -Im[Z(f)] versus Re[Z(f)] plot has been obtained. The samples were investigated in view of possible applications like miniaturized filters, diplexers and dielectric resonator antennas (DRA). In the RF and MW frequency region, the application of magneto-dielectric and multiferroic perovskite composite materials is desirable for the miniaturization of components. (C) 2010 Elsevier Ltd. All rights reserved.
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