Synthesis of β-silicon carbide nanofiber from an exfoliated graphite and amorphous silica

• Published in: Materials chemistry and physics Vol. 134; no. 1; pp. 13 - 15
• Main Authors: Hwang, Hae Jin, Lee, Kyoung-Jin, An, Yong-Tae, Choi, Byung-Hyun, Seo, Won-Seon
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.05.2012
• Subjects: Chemical synthesis; Electron microscopy; Nanostructures; Silicon carbide; Silicon carbide; Nanostructures; Chemical synthesis; Electron microscopy
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/j.matchemphys.2012.02.056

[Display omitted] ► Silicon carbide nanofibers could be synthesized from an exfoliated graphite and silica. ► The exfoliated graphite played a very important role for the formation of the SiC nanofibers. ► The formation mechanism of the nanofiber was proposed and discussed in terms of silica content. Silicon carbide (SiC) nanofibers were synthesized from exfoliated graphite containing silica particles at 1425°C in a 25% H2/Ar atmosphere. Two types of SiC nanofibers with different morphologies were formed depending on the silica content. A higher silica content led to straight nanofibers with a regular diameter size. The SiC nanofibers derived from the exfoliated graphite/40wt% SiO2 powder mixture contained a large number of stacking faults and grew along the [111] direction. A gas–gas reaction mechanism was proposed to explain the formation of SiC nanofibers.