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Synthesis and characterization of BaTiO_3/α-Fe_2O_3 core/shell structure

Journal of Advanced Ceramics 2019年第1期8卷 133-147页

作者： Suzana FILIpOVI? vera p.pavlovi?? Miodrag MITRI? Steva LEVI? Neboj?a MITROVI? Aleksa MARI?I? Branislav VLAHOVI? Vladimir B.pavlovi? Institute of Technical Sciences of Serbian Academy of Sciences and Arts Faculty of Mechanical Engineering University of Belgrade "Vin?a" Institute of Nuclear Sciences University of Belgrade Faculty of Agriculture University of Belgrade Faculty of Technical Sciences ?a?ak University of Kragujevac North Carolina Central University NASA University Research Center for Aerospace Device Research and Education and NSF Center of Research Excellence in Science and Technology Computational Center for Fundamental and Applied Science and Education

Multiferroic materials attracted a lot of attention in recent years because of their significant scientific interest and technological applications. The multiferroic core/shell powders have a better connectivity between the phases, resulting in superior dielectric and magneto electric properties. In this study, the influence of preparation condition on structure and properties of BaTiO_3/α-Fe_2 O_3 core/shell composite materials was examined. The five samples were obtained by varying synthesis conditions, such as synthesized method(co-precipitation and sonochemical method) and pH values of solution. XRD and Raman spectroscopy analyses were performed in order to determine phase composition and structural changes within samples. Morphology modifications were examined by SEM and EDS analyses. Finally, effect of structural and microstructural changes on magnetic and electrical properties was detected and explained.

关键词： ceramics electronic materials magnetic materials Raman spectroscopy X-ray diffraction(XRD) ferroelectricity

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