Synthesis of Sr0.5Ba0.5Nb2O6 by urea method |
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| Affiliation: | 1. Physical and Materials Chemistry division, National Chemical Laboratory, Pune 411008, India;2. Center for Materials Characterization, National Chemical Laboratory, Pune 411008, India;1. Centre of Advanced Study in Physics, Department of Physics, Panjab University, Chandigarh 160014, India;2. Akal School of Physics, Eternal University, Baru Sahib, Himachal Pradesh 173101, India;3. National Physical Laboratory, New Delhi 110012, India;1. Department of Physics, The Islamia University of Bahawalpur, Pakistan;2. Department of Physics, GC University Faisalabad;1. Division of Chemistry and Biotechnology, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tushima-naka, Kita-ku, Okayama 700-8530, Japan;2. Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimo-Shidami, Moriyama-ku, Nagoya 463-8560, Japan |
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| Abstract: | A precipitate was formed when an aqueous solution of SrCl2, BaCl2, NbF5 and urea in stoichiometric ratio (total metal cations to urea ratio is 5) is heated on a water bath.. This precipitate on decomposition at 750 °C yielded the nanocrystallites of ternary oxide, Sr0.5Ba0.5Nb2O6 (SBN) as confirmed by X-ray diffraction study (XRD). This is much lower temperature as compared to that prepared by traditional solid state method (1000 °C) as reported for the formation of SBN ceramics. Transmission electron microscope (TEM) investigations revealed that the average particle size is 100 nm for the calcined powders. The room temperature dielectric constant at 1 kHz is found to be 1050. The ferroelectric hysteresis loop parameters of these samples were also studied. |
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