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

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Abstract

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.

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Acknowledgments

This work was supported by Agencia Nacional de Promoción Científica y Tecnológica and Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina). M.G.S. thanks support from CIUNR. R.M. thanks Fundación Josefina Pratts.

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Authors and Affiliations

  1. Instituto de Física Rosario, UNR, 27 de Febrero 210 Bis, (2000), Rosario, Argentina

    R. Machado, M. G. Stachiotti & R. Bolmaro

  2. Laboratorio de Materiales Cerámicos, FCEIyA, IFIR, UNR, Av. Pellegrini 250, (2000), Rosario, Argentina

    M. L. Santiago, N. Pellegri & O. de Sanctis

  3. Área Física, FCByF, UNR, Suipacha 531, (2000), Rosario, Argentina

    A. Frattini

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  1. R. Machado
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  2. M. L. Santiago
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  3. M. G. Stachiotti
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  4. A. Frattini
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  5. N. Pellegri
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  6. R. Bolmaro
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  7. O. de Sanctis
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Correspondence to M. G. Stachiotti.

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Machado, R., Santiago, M.L., Stachiotti, M.G. et al. Effects of acetoin as chelating agent on the preparation of SrBi2Ta2O9 thin films from non-hydrolyzing precursors. J Sol-Gel Sci Technol 48, 294–302 (2008). https://doi.org/10.1007/s10971-008-1812-2

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  • DOI: https://doi.org/10.1007/s10971-008-1812-2

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