An investigation on the phase formation and electrical properties of Bi2O3 ceramics co–doped with Ce–Ho–Tb rare earths

Balcı M., Payveren Arıkan M., Saatçi B., Arı M.

JOURNAL OF SOLID STATE CHEMISTRY, cilt.329, sa.---, ss.124447, 2024 (SCI-Expanded)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 329 Sayı: ---
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1016/j.jssc.2023.124447
  • Dergi Adı: JOURNAL OF SOLID STATE CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Metadex
  • Sayfa Sayıları: ss.124447
  • Erciyes Üniversitesi Adresli: Evet

Özet

In this paper, Ce–Ho–Tb co–doped Bi2O3 compositions were developed using the solid–state reaction method under atmospheric conditions. The XRD patterns confirm the stability of the cubic δ–phase in Ho and Tb–rich compositions but not in the Ce–rich ones, which consist of mixed phases, such as α and β. Peak shifting is additionally apparent in the magnified XRD diagram of primary peaks regarding the (111) diffraction plane, suggesting that the structural features change with doping. At 700 °C, the highest conductivity is found to be 0.30 S/cm for the composition 8Ce4Ho4Tb, and it is comparable to the single–doped (Bi2O3)0.80(Er2O3)0.20 system at the same temperature. The FE–SEM images show the aggregation, particularly in images of Ce–rich compositions, implying that large cations have difficulty penetrating the lattice. The porosity over the surface is dense, particularly for Tb–rich compositions, indicating a decline in conductivity with doping.