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

A. Ianculescu, A. Bráileanu, M. Zaharescu, S. Guillemet, I. Pasuk, J. Madarász, G. Pokol

Research output: Article

19 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)173-180
Number of pages8
JournalJournal of Thermal Analysis and Calorimetry
Volume72
Issue number1
DOIs
Publication statusPublished - jan. 1 2003

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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