Journal of Northeastern University(Natural Science)

Journal of Northeastern University ›› 2008, Vol. 29 ›› Issue (4): 573-576.DOI: -

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Preparation of ultrafine calcium sulfate whiskers by hydrothermal synthesis

Yuan, Zhi-Tao (1); Wang, Xiao-Li (1); Han, Yue-Xin (1); Yin, Wan-Zhong (1)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-04-15 Published:2013-06-22
  • Contact: Yuan, Z.-T.
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Abstract: Hydrothermal synthesis was applied to the preparation of ultrafine calcium sulfate whiskers in airtight reactor with gypsum as primary material. The optimum conditions for the preparation were that the reaction temperature is 120°C and initial pH value of CaSO4·2H2O slurry is 9.8-10.1 with mass fraction 5% and mean particle size 18.1 μm, as a result of SEM to analyze the diameter of CaSO4 whiskers. Then, the ultrafine CaSO4 whiskers with average diameter 0.19 μm and aspect ratio 98 were obtained. The conclusion drawn from the preparation will play a guiding role in the industrial production of ultrafine calcium sulfate whiskers.

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