Preparation of long alumina fibers by sol-gel method using tartaric acid |
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Authors: | Hong-bin Tan |
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Affiliation: | (1) State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, 710049 Xi’an, People’s Republic of China;(2) School of Materials Science and Engineering, Shaanxi University of Technology, 723003 Hanzhong Shaanxi, People’s Republic of China |
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Abstract: | Long alumina fibers were prepared by sol-gel method. The spinning sol was obtained by mixing aluminum nitrate, tartaric acid, and polyvinylpyrrolidone with a mass ratio of 10:3:1.5. Thermogravimetry-differential scanning calorimetry (TG-DSC), Fourier transform infrared (FT-IR) spectra, X-ray diffraction (XRD), and scanning electron microscopy (SEM) were used to characterize the properties of the gel and ceramic fibers. A little of α-Al2O3 phase is observed in the alumina precursor gel fibers sintered at 1273 K. The fibers with a uniform diameter can be obtained when sintered at 1473 K, and its main phase is also indentified as α-Al2O3. |
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