Abstract
Barium-ferrite-containing glass ceramic fibers were successfully prepared by the combination of a sol–gel process and electrospinning technique using basic iron formate, barium acetate and boric acid as the starting materials. After leaching of barium borate matrix, pure phase BaFe12O19 fibers were obtained. The relationship of aged time and viscosity of the precursor solution was studied and the results showed that the viscosity corresponding to the spinnable state was 1–4 Pa s. The morphology, structure and magnetic properties of the obtained fibers were characterized with scanning electron microscopy, transmission electron microscopy, fourier transform infrared spectroscopy, thermo gravimetric analysis–differential scanning calorimetry, vibrating sample magnetometer. The X-ray diffraction results indicate that only the M-type Ba-ferrite and Ba-borate exist. The fibers had rough surface and hollow structure with the diameter no more than 1 μm. The fibers were composed of 40 nm BaFe12O19 nanoparticles embedded in the borate matrix. The coercivity and saturation magnetization of the synthesized fibers were 4,106.9 Oe and 17.8 emu/g, respectively.
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Acknowledgment
The financial support received from Natural Science Foundation of China (No. 50706033) is acknowledged. The authors thank Prof. Cong-Hua Lu (Tianjin University) for the help in the English proofreading.
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Liu, J., Gong, C. & Fan, G. Preparation and properties of barium-ferrite-containing glass ceramic fibers via an electrospinning/sol–gel process. J Sol-Gel Sci Technol 61, 185–191 (2012). https://doi.org/10.1007/s10971-011-2612-7
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DOI: https://doi.org/10.1007/s10971-011-2612-7