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Formation and properties of some Nb-doped SrTiO3-based solid solutions

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Abstract

It is well known that SrTiO3 is one of the widely used materials in the electronic ceramic industry. Donor-type dopants are often added in order to improve the electrical properties of SrTiO3-based ceramics. In the present study, the formation and characteristics of undoped and Nb-doped SrTiO3 were studied as a function of both the niobium dopant concentration and the Sr/Ti ratio (at the same Nb content). The formation mechanism of the mixed Sr(Ti,Nb)O3 crystals was investigated by XRD and thermal analysis. The niobium solubility in the SrTiO3 perovskite lattice was estimated by means of unit cell parameter data. The influence of Sr concentration on the microstructure of the ceramics obtained was investigated by SEM. Ceramic properties pointed out the influence of the dopant concentration and stoichiometry on the sintering behavior of these materials.

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Authors and Affiliations

  1. Laboratoire de Chimie des Matériaux Inorganiques et Energétiques, Paul Sabatier University, 118 Route de Narbonne, 31062, Toulouse Cedex 4, France

    A. Ianculescu

  2. Institute of Physical Chemistry 'I. G. Murgulescu', 202 Spl. Independentei, 77208, Bucharest, Romania

    A. Brăileanu & M. Zaharescu

  3. 'Paul Sabatier' University, CIRIMAT 118 Route de Narbonne, 31602, Toulouse Cedex 4, France

    S. Guillemet

  4. 3SC ICPE SA 313 Spl. Unirii, 74204, Bucharest, Romania

    I. Pasuk

  5. Institute of General and Analytical Chemistry Szt, Budapest University of Technology and Economics, Gellért tér 4, 1521, Budapest, Hungary

    J. Madarász & G. Pokol

Authors
  1. A. Ianculescu
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  2. A. Brăileanu
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  3. M. Zaharescu
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  4. S. Guillemet
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  5. I. Pasuk
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  6. J. Madarász
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  7. G. Pokol
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Correspondence to A. Brăileanu.

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Ianculescu, A., Brăileanu, A., Zaharescu, M. et al. Formation and properties of some Nb-doped SrTiO3-based solid solutions. Journal of Thermal Analysis and Calorimetry 72, 173–180 (2003). https://doi.org/10.1023/A:1023975904764

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  • DOI: https://doi.org/10.1023/A:1023975904764

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