Processing and structural characterization of Si-based carbothermal derivatives of rice husk

Adeolu Adesoji Adediran, Kenneth Kanayo Alaneme, Isiaka Oluwole Oladele, Esther Titilayo Akinlabi

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

The processing and structural characterization of Si-based carbothermal derivatives of rice husk (RH) was investigated. RH, an agro-waste, was used as starting material in a single-stage processing route to produce Si-based refractory compounds via carbothermal treatment. The processing was carried out at different temperatures windows (900–1,900°C) at 10°C/min heating range in a controlled atmosphere. The functional groups of the reaction products were analyzed using Fourier transform infrared spectroscopy. The crystalline and amorphous phases were identified by X-ray diffractometer (XRD), while the morphological features were examined by scanning electron microscopy. It was observed that the major functional groups present after carbothermal treatment of RH are OH (hydroxyl), Si–O–Si (siloxane), and Si–C groups. However, polytypes of silicon carbide (SiC) such as 3C-SiC (C = cubic), hexagonal symmetry 6H-SiC, and mixes of 3C-SiC, 2H-SiC, and 4H-SiC were various polytypes of SiC observed for different processing temperatures adopted. The SiC made up between 63 and 74 wt.% of the crystalline phases was identified by XRD from the process. Hence, the carbothermal treatment explored showed evidence of viability for production of Si-based refractory compounds which can serve as reinforcement in the development of metal matrix composites.

Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalCogent Engineering
Volume5
Issue number1
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • SiC
  • carbothermal reaction
  • graphite
  • heat treatment
  • rice husk

ASJC Scopus subject areas

  • General Computer Science
  • General Chemical Engineering
  • General Engineering

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