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Effects of Two Kinds of FeNbO<sub>4</sub>Precursors in the Obtainment and Dielectric Properties of PFN Ceramics
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2003
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Materials ScienceMaterials EngineeringPfn CeramicsDielectric PropertiesDielectric ConstantEngineeringCeramic MaterialFunctional CeramicApplied PhysicsCeramics MaterialsMicrowave CeramicFenbo4 PrecursorsChemistryCrystallographyCeramic PowdersDielectric CharacterizationElectrical PropertiesFunctional Materials
We report here a study of the obtainment, structural and dielectric characterization of the monoclinic and orthorhombic phases of FeNbO4 precursors and their effects in the processing and the dielectric properties of Pb(Fe1/2Nb1/2)O3 ceramics. Crystallographic and surface morphological studies were carried out by powder X-ray diffraction and scanning electron microscopy techniques. For structural determination, runs of Rietveld refinement were realized employing FULLPROF software. Measurements of electrical resistivity, dielectric constant and dielectric loss as functions of temperature were realized in PFN ceramics. An analysis and a comparative discussion of results are presented.