Effect of the calcination temperature on the properties of Sm-doped CeO2


Arabaci A.

EMERGING MATERIALS RESEARCH, cilt.9, ss.296-301, 2020 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 9 Konu: 2
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1680/jemmr.18.00082
  • Dergi Adı: EMERGING MATERIALS RESEARCH
  • Sayfa Sayıları: ss.296-301

Özet

Samarium (Sm)-doped ceria (CeO2) (SDC), a ceria-based material, is a leading electrolyte for solid oxide fuel cell applications. In this work, fully dense ceria ceramics doped with 20 mol% samarium were fabricated through the Pechini method. Characterization studies including X-ray diffraction (XRD) and scanning electron microscopy (SEM) were performed to investigate the properties of the SDC powders calcined at 400 and 500 degrees C for 4 h. XRD and SEM results showed that a complete solid solution between ceria and samarium was obtained when the sintering temperature and time were 1400 degrees C and 6 h, respectively. The relative densities of the sintered pellets were over 90% of the theoretical density. The spectroscopic properties of the powders were studied by using Fourier transform infrared spectroscopy. Two-probe alternating-current impedance spectroscopy was used to study the grain, grain boundary and total ionic conductivity of the doped samples at 250-750 degrees C.