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Full Paper
Processing and Characterization of Spherical Alumina Pellets Coated with BaTiO3 and Li0.10Ti0.02Ni0.88O Dielectric Materials
Article first published online: 21 OCT 2008
DOI: 10.1002/ejic.200800538
Copyright © 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Fournaud, B., Iordan, A., Rossignol, S., Tatibouët, J.-M. and Thollon, S. (2008), Processing and Characterization of Spherical Alumina Pellets Coated with BaTiO3 and Li0.10Ti0.02Ni0.88O Dielectric Materials. Eur. J. Inorg. Chem., 2008: 5263–5273. doi: 10.1002/ejic.200800538
Publication History
- Issue published online: 11 NOV 2008
- Article first published online: 21 OCT 2008
- Manuscript Received: 28 MAY 2008
Funded by
- Centre National de la Recherche Scientifique (CNRS)
- CEA of Grenoble
- Abstract
- Article
- References
- Cited By
Keywords:
- Dielectric materials;
- Sol–gel processes;
- Coating;
- Spherical pellets;
- Electron microscopy
Abstract
Sol–gel methods were used to synthesize BaTiO3 and LixTiyNi(1–x) materials. Processes using these sols were adjusted to coat spherical alumina pellets. The annealing temperature was studied in detail. This study also focuses on the characterization of the deposits. Data obtained by XRD, scanning electron microscopy, Raman spectroscopy, and gravimetric analyses were compared. Multiple impregnations were necessary to achieve a satisfactory deposit of the dielectric material. For Li0.10Ti0.02Ni0.88O, these sol–gel methods led to an impregnation depth of 50 μm, whereas for BaTiO3 a homogeneous deposit of only 5 μm was obtained. A special treatment with an ammonia solution was required to efficiently disperse BaTiO3. This preparation method achieved a spherical deposit of the dielectric material. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)