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: | School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723003, 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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Keywords: | alumina fibers sol-gel process polyvinylpyrrolidone |
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