Articles
  • Effect of composition on the ability to form SiC/SiO2-C composite from rice husk and silica gel

  • Do Quang Minha,b, Tran Van Khaia,b, Huynh Ngoc Minha,b, Nguyen Vu Uyen Nhia,b and Kieu Do Trung Kiena,b,*

  • aFaculty of Materials Technology, Ho Chi Minh City University of Technology, 268 Ly Thuong Kiet street, Ward 14, District 10, Ho Chi Minh City, Vietnam
    bVietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Rice husk is a waste product of agricultural production of rice. Every year, the agricultural production of Vietnam emits about 10 million tons of rice husks. Rice husks are usually treated by burning method or discharged into rivers, causing many negative impacts on the environment. In this study, the rice husk/silica gel ratio components were investigated to form SiC/SiO2-C composite in a CO2 environment at 1000 oC for 60 min. The products after pyrolysis were determined SiC, SiO2, and free C contents according to ISO 21068-2: 2008 standards. The functional groups and mineral composition of composites were analyzed by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The microstructure and element distribution of them were observed by scanning electron microscope (SEM) and Energy-dispersive X-ray (EDX) mapping. The results showed that the optimum rice husk/silica gel ratio to form SiC/SiO2-C was 1.4/1. The sample after pyrolysis had chemical composition including 14% SiC, 63% SiO2, 23% free C (%wt.) and the phase composition including amorphous carbon, β-SiC, 6H-SiC, 4H-SiC, cristobalite. Composite SiC/SiO2-C can apply to advanced friction systems. This can be seen as an effective method to treat rice husk waste and improved the economic value of rice plants


Keywords: Silicon carbide, rice husk, SiC/SiO2-C composite

This Article

  • 2021; 22(2): 246-251

    Published on Apr 30, 2021

  • 10.36410/jcpr.2021.22.2.246
  • Received on Dec 20, 2020
  • Revised on Feb 11, 2021
  • Accepted on Mar 2, 2021

Correspondence to

  • Kieu Do Trung Kien

  • aFaculty of Materials Technology, Ho Chi Minh City University of Technology, 268 Ly Thuong Kiet street, Ward 14, District 10, Ho Chi Minh City, Vietnam
    bVietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
    Tel : +(84.8) 8 661 320 Fax: +(84.8) 8 661 843

  • E-mail: kieudotrungkien@hcmut.edu.vn