Real carbon source of diamond single crystals grown in the Fe–Ni–C system under high temperature and high pressure

✍ Scribed by He-sheng Li; Mu-sen Li; Jian-jun Cui

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 39 KB
• Volume: 48
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/j.carbon.2010.03.053

✦ Synopsis

Carbon microspheres (CMSs) were synthesized by chemical vapor deposition in an Ar atmosphere using deoiled asphalt as carbon source. KMnO 4 aqueous solutions with different concentrations were used to oxidize the CMSs to form MnO 2 -coated CMSs (MnO 2 /CMS composites) and H 2 C 2 O 4 solution was used to wash the MnO 2 /CMS composites to remove MnO 2 to obtain oxidized CMSs. The morphology and structure of the CMSs before and after MnO 2 deposition, as well as the oxidized CMSs, were characterized by field-emission scanning electron microscopy and X-ray diffraction. The dispersion of the oxidized CMSs in water and ethanol