High-frequency magnetic properties of Co-Ti substituted barium ferrites prepared by modified chemical coprecipitation method |
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Authors: | Changsheng Wang Longtu Li Ji Zhou Xiwei Qi Zhenxing Yue |
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Affiliation: | (1) State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People's Republic of China |
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Abstract: | Co-Ti substituted barium ferrites were prepared by a modified chemical coprecipitation method. Microstructures and high-frequency magnetic properties were investigated by X-ray diffraction (XRD) transmission electron microscopy (TEM) scanning electron microscopy (SEM) and measurements of complex permeability spectra. Barium ferrites with Co-Ti substitution x=1.0 have the highest permeability ![mgr](/content/l126p540n001227v/xxlarge956.gif) and the lowest magnetic resonant frequency fros and fros can be changed continuously with changing Co-Ti substitution in the hyper-frequency region while ![mgr](/content/l126p540n001227v/xxlarge956.gif) ![prime](/content/l126p540n001227v/xxlarge8242.gif) keeps its high value at the same time. A higher sintering temperature corresponds to higher ![mgr](/content/l126p540n001227v/xxlarge956.gif) and lower fros due to the grain growth. The d.c. electrical resistivity for all samples was above 108 cm. |
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