Measurement and Properties of the Oxide Ionic Conductivity of beta- and delta-Phases in the Binary (Bi2O3)(1-x)(Tb4O7)(x) System


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Kalaycioglu N. , Circir E.

SYNTHESIS AND REACTIVITY IN INORGANIC METAL-ORGANIC AND NANO-METAL CHEMISTRY, cilt.42, ss.398-401, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 42 Konu: 3
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1080/15533174.2011.611565
  • Dergi Adı: SYNTHESIS AND REACTIVITY IN INORGANIC METAL-ORGANIC AND NANO-METAL CHEMISTRY
  • Sayfa Sayıları: ss.398-401

Özet

The total conductivity (sT) in the beta-phase and delta-Bi2O3 doped with Tb4O7 system was measured in the composition range between 1 and 30 mol% Tb4O7 at different temperatures. According to the DTA/TG results, this tetragonal type solid solution was stable up to about similar to 740 degrees C, and the solubility limit was found at similar to 5 mol% Tb4O7 in the beta-phase; this fcc type solid solution was stable up to about similar to 740 degrees C, and the solubility limit was found at similar to 30 mol% Tb4O7 in the delta-phase. All phases showed predominant oxide ionic conduction. It has been proposed that beta- and delta-Bi2O3 phases contain a large number of oxide anion vacancies and incorporated terbium cations at tetrahedral sites that affect the oxygen sublattice of the crystal structure.