期刊
PHYSICA B-CONDENSED MATTER
卷 550, 期 -, 页码 189-198出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physb.2018.08.036
关键词
Cerium oxide; Conductivity; Dielectric properties; Optical band gap; Structural properties
资金
- Thapar Institute of Engineering and Technology, Patiala
In the present study, Na2O doped CeO2 has been prepared by solid state reaction method. The prepared samples are characterized by X-ray diffraction (XRD), UV-Visible spectroscopy, Fourier transform infrared (FTIR) spectroscopy, Scanning electron microscope (SEM) and Impedance spectroscopy. The optical band gap of all the samples lies in the semiconducting range i.e. 3.04-3.25 eV. The highest optical band gap is observed for 5 mol% Na2O doped CeO2. The SEM images show a non-uniform distribution of particles with an average particle size of similar to 3.15 mu m for all the samples. The lowest dielectric constant is observed to be similar to 11 at 100 degrees C and 100 Hz for 10 mol% doped CeO2 which is lower than the undoped CeO2. The conductivity of the samples lies in the range of 10(-7) S/CM at 700 degrees C.
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