Chemical Research in Chinese Universities ›› 2009, Vol. 25 ›› Issue (6): 920-923.

• Articles • Previous Articles     Next Articles

Influence of Carbon-doped Content on Formation Conditions of Coesite

  

  1. 1. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130021, P. R. China;
    2. Adult Education College, Changchun University, Changchun 130022, P. R. China;
    3. Center of the Condensed Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, P. R. China;
    4. International Center for Material Physics, Chinese Academy of Sciences, Shenyang 110015, P. R. China
  • Received:2009-01-12 Revised:2009-09-03 Online:2009-11-25 Published:2010-01-25
  • Contact: LIU Xiao-mei. E-mail: xiaomeiliu58@sina.com
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.50872041 and 10674034), the National Foundation for Fostering Talent in Basic Science of China(No.J0730311) and the Foundation of State Key Laboratory of Superhand Materials (No.200908).

Abstract:

The mixtures of α-quartz and graphite powder with different mass ratios were, respectively, high-energetically mechanically milled and then treated under high pressure and high temperature. The influences of carbon content on the synthesis conditions of coesite were investigated. The experimental products were characterized by XRD, TEM, and Raman spectrometry. The results show that the existence of carbon can obviously inhibit the formation of coesite, and the higher the carbon content of the initial material, the higher the pressure for forming coesite.

Key words: Coesite; High pressure; Mechanical ball-milling; α-SiO2; Graphite