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Interface Investigation in Nanostructured BaTiO3/Silica Composite Ceramics

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Silica-coated ferroelectric particles are promising building blocks for functional bulk composites such as dielectric resonators, supercapacitors, or multiferroics. The ferroelectric/silica interface was fully investigated by means of high-temperature in situ X-ray diffraction, high-resolution scanning electron microscopy, and X-ray photoelectron spectroscopy. Mechanisms occurring at the interface were visualized using high-resolution postmortem and in situ transmission electron microscopy performed at different temperatures. On the light of this interface investigation, we have used advanced sintering processes such as spark plasma sintering and microwave sintering to obtain nanostructured composite ceramics and to evaluate their dielectric properties.
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Document Type: Research Article

Affiliations: 1: CNRS, Université Bordeaux, ICMCB, F-33608 Pessac Cedex, France 2: CEMES-CNRS, BP 93347, 31055 Toulouse Cedex 4, France 3: CIRIMAT et Plateforme Nationale CNRS de Frittage Flash, PNF2 MHT, Université Paul Sabatier, 33062 Toulouse, France 4: CRISMAT, UMR 6508 CNRS, 14050 Caen Cedex 4, France 5: Darmstadt University of Technology, Institute of Materials Science, Surface Science Division, Petersenstrasse 23, 64287 Darmstadt, Germany

Publication date: 2010-03-01

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