Synthesis, characterization, and dielectric properties of Ba(Ti1−xSnx)O3 nanopowders and ceramics |
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| Authors: | Fengtao Du Hualei Cheng Ruiyuan Niu Zhuguo Chang |
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| Affiliation: | Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), Shaanxi Key Laboratory of Physico-Inorganic Chemistry, School of Chemistry & Materials Science, Northwest University, Tai Bai Bei Road 229#, 710069, Xi’an, China |
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| Abstract: | We prepared Ba(Ti1−xSnx)O3 powders and ceramics by means of the sol-gel process, with dibutyltin dilaurate as the Sn precursor. The samples were characterized by means of Fourier-transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and scanning electron microscopy, and also determined the dielectric properties of the ceramics. The powders synthesized by means of the sol-gel process had a grain size on the nanometer scale, with the grains mainly composed of a cubic BaTiO3 phase. Sn can disperse into BaTiO3 more uniformly in the sol-gel technique using dibutyltin dilaurate as the Sn precursor. With increasing Sn concentration, the grain size of the Ba(Ti1-xSnx)O3 ceramics increased and the maximum dielectric constant (?max) first increased and then decreased. At a Sn concentration of 5 mol%, ?max reached its maximum value (19,235). |
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| Keywords: | A. Ceramics B. Sol-gel chemistry C. Electron microscopy C. X-ray diffraction D. Dielectric properties |
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