ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 55, (3) 276 - 279 (2011)


CONTINUOUS ALUMINA GEL FIBERS BY SOL-GEL METHOD USING GLYCOLIC ACID, ALUMINUM NITRATE AND POLYVINYLPYRROLIDONE
 
Tan Hongbin, Zhang Jianhua, Bo Haiwa
 
School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong Shaanxi 723003, People’s Republic of China

Keywords: Alumina fibers, Sol–gel method, Glycolic acid, Polyvinylpyrrolidone
 

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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