Preparation of cubic SiC from δ-Na2Si2O5/carbon nanocomposite using cobalt catalyst
Silicon carbide (SiC) was prepared by carbothermal reduction of a crystalline-layered sodium silicate (δ-Na2Si2O5)/carbon nanocomposite (LCN), which contained a stacked carbon film embedded with cobalt between the silicate layers. Subsequent sintering of this mixture for 3 h at 1000–1350°C resulted...
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doaj-c3dc49d15ab2460784c83b0add4e49222020-11-25T02:54:22ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142019-12-0120160060710.1080/14686996.2019.16194791619479Preparation of cubic SiC from δ-Na2Si2O5/carbon nanocomposite using cobalt catalystKyeong-Won Park0Oh-Yun Kwon1Gyeongsang National UniversityJeonnam National UniversitySilicon carbide (SiC) was prepared by carbothermal reduction of a crystalline-layered sodium silicate (δ-Na2Si2O5)/carbon nanocomposite (LCN), which contained a stacked carbon film embedded with cobalt between the silicate layers. Subsequent sintering of this mixture for 3 h at 1000–1350°C resulted in the formation of graphitic carbon and SiC. Meanwhile, sintering without a cobalt catalyst resulted in the formation of graphitic carbon, regardless of the temperature. The use of a cobalt catalyst allowed the formation of a pure SiC phase at 1350°C. The formed SiC had an irregular worm-like morphology, with a particle size of ~5 µm. The Brunauer-Emmett-Teller surface areas of graphitic carbon and SiC were 28–150 and ~7.0 m2/g, respectively. We concluded that graphite and SiC were produced at this low sintering temperature because of the cobalt catalyst, which facilitated nanomixing of carbon and SiO2 by sandwiching the carbon films between the silicate layers.http://dx.doi.org/10.1080/14686996.2019.1619479layered silicatenanocompositesilicon carbidegraphite |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Kyeong-Won Park Oh-Yun Kwon |
spellingShingle |
Kyeong-Won Park Oh-Yun Kwon Preparation of cubic SiC from δ-Na2Si2O5/carbon nanocomposite using cobalt catalyst Science and Technology of Advanced Materials layered silicate nanocomposite silicon carbide graphite |
author_facet |
Kyeong-Won Park Oh-Yun Kwon |
author_sort |
Kyeong-Won Park |
title |
Preparation of cubic SiC from δ-Na2Si2O5/carbon nanocomposite using cobalt catalyst |
title_short |
Preparation of cubic SiC from δ-Na2Si2O5/carbon nanocomposite using cobalt catalyst |
title_full |
Preparation of cubic SiC from δ-Na2Si2O5/carbon nanocomposite using cobalt catalyst |
title_fullStr |
Preparation of cubic SiC from δ-Na2Si2O5/carbon nanocomposite using cobalt catalyst |
title_full_unstemmed |
Preparation of cubic SiC from δ-Na2Si2O5/carbon nanocomposite using cobalt catalyst |
title_sort |
preparation of cubic sic from δ-na2si2o5/carbon nanocomposite using cobalt catalyst |
publisher |
Taylor & Francis Group |
series |
Science and Technology of Advanced Materials |
issn |
1468-6996 1878-5514 |
publishDate |
2019-12-01 |
description |
Silicon carbide (SiC) was prepared by carbothermal reduction of a crystalline-layered sodium silicate (δ-Na2Si2O5)/carbon nanocomposite (LCN), which contained a stacked carbon film embedded with cobalt between the silicate layers. Subsequent sintering of this mixture for 3 h at 1000–1350°C resulted in the formation of graphitic carbon and SiC. Meanwhile, sintering without a cobalt catalyst resulted in the formation of graphitic carbon, regardless of the temperature. The use of a cobalt catalyst allowed the formation of a pure SiC phase at 1350°C. The formed SiC had an irregular worm-like morphology, with a particle size of ~5 µm. The Brunauer-Emmett-Teller surface areas of graphitic carbon and SiC were 28–150 and ~7.0 m2/g, respectively. We concluded that graphite and SiC were produced at this low sintering temperature because of the cobalt catalyst, which facilitated nanomixing of carbon and SiO2 by sandwiching the carbon films between the silicate layers. |
topic |
layered silicate nanocomposite silicon carbide graphite |
url |
http://dx.doi.org/10.1080/14686996.2019.1619479 |
work_keys_str_mv |
AT kyeongwonpark preparationofcubicsicfromdna2si2o5carbonnanocompositeusingcobaltcatalyst AT ohyunkwon preparationofcubicsicfromdna2si2o5carbonnanocompositeusingcobaltcatalyst |
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1724721707143397376 |