Ceramics-Silikáty 55, (3) 276 - 279 (2011) |
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CONTINUOUS ALUMINA GEL FIBERS BY SOL-GEL METHOD USING GLYCOLIC ACID, ALUMINUM NITRATE AND POLYVINYLPYRROLIDONE
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Tan Hongbin, Zhang Jianhua, Bo Haiwa
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School of Materials Science and Engineering, Shaanxi University of Technology,
Hanzhong Shaanxi 723003, People’s Republic of China
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Keywords: Alumina fibers, Sol–gel method, Glycolic acid, Polyvinylpyrrolidone
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Continuous alumina fibers were prepared by sol-gel method. The spinning sol was obtained by mixing aluminum nitrate,
glycolic acid and polyvinylpyrrolidone with a weight ratio of 10:3:1.5. Fourier transform infrared (FTIR) spectra, X-ray
diffraction (XRD), and scanning electron microscopy (SEM) were used to characterize the properties of the gel and ceramic
fibers. The fibers with a uniform diameter and smooth surface were obtained by sintering at 1473K, and its main phase was
indentified as α-Al₂O₃. |
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