期刊
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
卷 21, 期 7, 页码 1563-1567出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-6326(11)60897-2
关键词
Al(2)O(3); long fiber; sol-gel method; polyvinylpyrrolidone
资金
- Natural Science Foundation of Shaanxi Province, China [2010K10-21]
The precursor sol of alumina was prepared by sol-gel method with aluminum nitrate and malic acid as raw materials. The effects of content of malic acid and polyvinylpyrrolidone (PVP) on sol spinnability were explored. The gel fibers with above 80 cm in length were obtained by mixing aluminum nitrate, malic acid and PVP on mass ratio of 10:3:1.5. Thermogravimetry-differential scanning calorimetry (TG-DSC), Fourier transform infrared (FTIR) spectrum, X-ray diffractometry (XRD), and scanning electron microscopy (SEM) were used to characterize the properties of the gel and ceramic fibers. The alumina fibers with a smooth surface and about 20 mu m in diameter were obtained by sintering at 1 200 degrees C, and their main phase was indentified to be alpha-Al(2)O(3).
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