Investigation of Mn-doped sodium-potassium niobate ((K,Na) NbO3) ceramics by EPR and impedance spectroscopic methods

Kaftelen H., Kanar D. E., Repp S., Weber S., Erdem E.

FERROELECTRICS, cilt.494, sa.1, ss.11-18, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 494 Sayı: 1
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1080/00150193.2016.1120052
  • Dergi Adı: FERROELECTRICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.11-18
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

The effects of Mn-doping on the conductivity and the oxidation state were investigated for (K,Na)NbO3 ceramics with stoichiometric, and 2mol % A-site and B-site excess compositions. From electron paramagnetic resonance (EPR) and impedance spectroscopy we found that Mn is located at the Nb-site with the oxidation state 2+ and, due to the generation of oxygen vacancies, Mn-doping reduces the conductivity in (K,Na)NbO3 ceramics.