Structural characterization of silica based carbothermal derivatives of rice husk

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

Research output: Contribution to journalConference articlepeer-review

10 Citations (Scopus)


The economy of using agro-wastes in the design of novel ceramic materials is a good option to environmental waste management. A good number of these agro-wastes have been adjudged to be rich in silica, thus making them potentially useful materials for the development of silica-based refractory compounds. The present study was motivated by this prospect and the investigation focused on the structural characteristics of silica-based carbothermal derivatives of rice husk (ash). Rice husk ash (RHA), an agro-waste was used as starting material in a double stage processing route to produce silica-based refractory compounds via carbothermal treatment. The processing was carried out at different temperatures windows (900-1350 oC) at 10 oC/min heating rate in a controlled atmosphere using a conventional heat treatment furnace. The functional groups of the silica-based refractory compounds were analyzed through Fourier transform infrared spectroscopy (FTIR) while the crystalline and amorphous phases were identified by X-ray Diffractometry (XRD). It was observed that the major functional groups present after carbothermal treatment of the RHA are -OH, Si-O-Si and Si-O groups. The optimum yield of silica polytypes amounting to 74.2% was observed in sample designated A, while sample designated C showed the least value of silica polytypes of 53.04%. It was observed that no yield of SiC phases was observed in the carbothermal sequence. The carbothermal treatment explored showed evidence of viability for production of silica-based refractory compounds.

Original languageEnglish
Pages (from-to)436-441
Number of pages6
JournalProcedia Manufacturing
Publication statusPublished - 2019
Event2nd International Conference on Sustainable Materials Processing and Manufacturing, SMPM 2019 - Sun City, South Africa
Duration: 8 Mar 201910 Mar 2019


  • Carbothermal reaction
  • Graphite
  • Heat treatment
  • Rice husk ash
  • Silica

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Artificial Intelligence


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