Abstract
The aim of this work is to study the effect of Na doping on the structural, microstructural and electrical properties of SrCeO3. With this goal, SrCe1−xNaxO3 (x = 0, 0.02, 0.04, 0.06 and 0.10) polycrystalline ceramics have been prepared using the solid-state route. The phase and structure of the synthesized samples were confirmed using X-ray diffraction technique. Rietveld refinement of the XRD profile confirmed that all the samples have orthorhombic structure and space group Pnma. Further, the purity of the synthesized samples was checked using Raman and Fourier transformation infrared (FTIR) spectroscopy techniques. The optical bandgap was calculated using UV–Vis technique, and the values were found 3.01 and 3.12 eV for pristine and Na doped samples. Scanning electron microscopic studies of fractured surfaces of the sintered pellets have indicated that dopant Na has played a significant role in grain growth. Grain size and morphology of Na doped samples is different from pristine SrCeO3. DC conductivity of Na doped samples is lower than undoped SrCeO3.
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Acknowledgements
The authors are grateful to the Head, Department of Physics and Coordinator, Central Instrument Facility Centre (CIFC), IIT(BHU), Varanasi for providing the experimental facilities required for the characterization of the synthesized samples. Mr. Dharmendra Yadav, Mr. Upendra Kumar, and GurudeoNirala are thankful to the Ministry of Human Resource and Development (MHRD), Government of India for the financial support in terms of Senior Research Fellowship (SRF). We acknowledge Ashish Kumar Mall of IIT Kanpur, India for providing Raman facility.
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Yadav, D., Kumar, U., Nirala, G. et al. Effect of acceptor Na1+ doping on the properties of perovskite SrCeO3. J Mater Sci: Mater Electron 30, 15772–15785 (2019). https://doi.org/10.1007/s10854-019-01963-0
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DOI: https://doi.org/10.1007/s10854-019-01963-0