A study of NiZnCu-ferrite/SiO2 nanocomposites with different ferrite contents synthesized by sol–gel method
作者： Shifeng Yan , Jianxin Geng , Jianfeng Chen , Li Yin , Yunchun Zhou
DOI: 10.1016/J.JMMM.2004.11.145
关键词: Differential thermal analysis 、 Ferrite (magnet) 、 Scanning electron microscope 、 Nuclear magnetic resonance 、 Thermogravimetry 、 Chemical engineering 、 Transmission electron microscopy 、 Sol-gel 、 Thermal decomposition 、 Thermogravimetric analysis 、 Materials science 、 Electronic, Optical and Magnetic Materials 、 Condensed matter physics
摘要: Ni0.65Zn0.35Cu0.1Fe1.9O4/SiO2 nanocomposites with different weight percentages of NiZnCu-ferrite dispersed in silica matrix were successfully fabricated by the sol-gel method using tetraethylorthosilicate (TEOS) as a precursor silica, and metal nitrates precursors NiZnCu ferrite. The thermal decomposition process dried gel was studied thermogravimetric analysis (TGA) differential (DTA). obtained characterized X-ray diffraction (XRD), transmission electron microscope (TEM), scanning (SEM), Mossbauer spectroscopy vibrating sample magnetometry (VSM). formation stoichiometric is confirmed when percentage ferrite not more than 30%. Samples higher content have small amount alpha-Fe2O3. transition from paramagnetic to ferromagnetic state observed increases 20 90wt%.
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