Effects of acetoin as chelating agent on the preparation of SrBi2Ta2O9 thin films from non-hydrolyzing precursors

Ferroelectric thin films of strontium bismuth tantalate (SBT) have been fabricated by a chemical solution deposition technique using non-hydrolyzing precursors. Strontium acetate, bismuth nitrate and tantalum ethoxide were used as precursor materials, with methanol and glacial acetic as solvents. We...

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Bibliographic Details
Published in:Journal of sol-gel science and technology 2008-12, Vol.48 (3), p.294-302
Main Authors: Machado, R., Santiago, M. L., Stachiotti, M. G., Frattini, A., Pellegri, N., Bolmaro, R., de Sanctis, O.
Format: Article
Language:English
Subjects:
Alkanolamines
Bismuth
Ceramics
Chelating agents
Chelation
Chemistry
Chemistry and Materials Science
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Composites
Crystal structure
Crystallization
Dielectric properties
Exact sciences and technology
Ferroelectric materials
Ferroelectricity
General and physical chemistry
Glass
Grain size distribution
Inorganic Chemistry
Investigations
Materials Science
Microstructure
Nanotechnology
Natural Materials
Optical and Electronic Materials
Organic chemistry
Organic compounds
Original Paper
Precursors
Strontium
Tantalum
Thermal evolution
Thin films
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Summary:Ferroelectric thin films of strontium bismuth tantalate (SBT) have been fabricated by a chemical solution deposition technique using non-hydrolyzing precursors. Strontium acetate, bismuth nitrate and tantalum ethoxide were used as precursor materials, with methanol and glacial acetic as solvents. We investigate the effects of the precursor chemistry, by the selection of the chelating agent, on the elimination of residual organic compounds, thermal evolution of phase formation, and microstructure evolution of derived films. We found that the utilization of alkanolamines as chelating agent produce the segregation of metallic bismuth in as-prepared powders. On the other hand, acetoin, one of the hydroxyketones, showed the elimination of residual organics at low temperature, an earlier onset of crystallization, and no segregation of secondary phases during the whole crystallization process. A comparative investigation of the surface microstructure, grain size distribution, crystallinity, and degree of crystal orientation of films fabricated with the different chelating agents is presented. The dielectric and ferroelectric properties of films prepared with acetoin are investigated.
ISSN:0928-0707
1573-4846
DOI:10.1007/s10971-008-1812-2