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Title: Effect of sintering temperature on structural and electrical properties of BiFeO3 multiferroics
Authors: Pandu, Ratnakar
Yadav, K L
Kumar, Amit
Reddy, P Ravinder
Gupta, A V S S K S
Keywords: Ceramics;X-ray diffraction;Dielectric properties;Grain size;Multiferroic
Issue Date: Dec-2010
Publisher: NISCAIR-CSIR, India
Abstract: Polycrystalline samples of BiFeO3 are synthesized at low temperature using sol-gel technique. From the XRD analysis it is seen that crystallite size increases and the strain in the crystallites decreases with increasing sintering temperature. As the crystallite size increases with increasing temperature the lattice parameter (aR) decreases. SEM micrographs show that the samples are homogeneous. It is also confirmed from the SEM micrographs that the grain size increases with increasing sintering temperature. Analyzing the SEM micrographs it can be concluded that the particle size follows the Gaussian distribution. Ferroelectric to paraelectric transition temperature (Tc) is detected by DTA analysis, which shows that the Curie temperature of pure BiFeO3 is 814°C which is very close to the ideal value (827°C) found by dielectric measurement.
Page(s): 481-485
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.17(6) [December 2010]

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