Improved oxidation resistance of expanded graphite through nano SiC coating

Ning Liao; Yawei Li; Jiangbo Shan; Tianbin Zhu; Shaobai Sang; Dechang Jia

doi:10.1016/j.ceramint.2017.11.110

Improved oxidation resistance of expanded graphite through nano SiC coating

Ning Liao^*
, Yawei Li
, Jiangbo Shan
, Tianbin Zhu
, Shaobai Sang
, Dechang Jia

^*Corresponding author for this work

Wuhan University of Science and Technology
Harbin Institute of Technology
Tsinghua University

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Expanded graphite with nano SiC and amorphous SiC_xO_y coating was successfully prepared through pyrolysing silane coupling agent (SCA), where the grafting of SCA dominated the final products. The results show that mainly amorphous SiC_xO_y coating covers expanded graphite at 1000 °C, regardless of the SCA concentration. In comparison, nano SiC coating can be synthesized at 1200 °C depending on the good dispersion of SCA (with a SCA concentration of 50 vol%). The formed SiC coating contributes to much higher peak oxidation temperature (812.1 °C) than 678.0 °C of the pure expanded graphite. Meanwhile, the oxidation activation energies of expanded graphite are remarkably improved from 149.15 kJ/mol to 176.16 kJ/mol (based on Kissinger method), attributing to the derived nano SiC and SiC_xO_y coating.

Original language	English
Pages (from-to)	3319-3325
Number of pages	7
Journal	Ceramics International
Volume	44
Issue number	3
DOIs	https://doi.org/10.1016/j.ceramint.2017.11.110
State	Published - 2018
Externally published	Yes

Keywords

Expanded graphite
Oxidation resistance
SiC coating
Silane coupling agent

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10.1016/j.ceramint.2017.11.110

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@article{f1a5949bf53545c590785d8e1383f3f3,

title = "Improved oxidation resistance of expanded graphite through nano SiC coating",

abstract = "Expanded graphite with nano SiC and amorphous SiCxOy coating was successfully prepared through pyrolysing silane coupling agent (SCA), where the grafting of SCA dominated the final products. The results show that mainly amorphous SiCxOy coating covers expanded graphite at 1000 °C, regardless of the SCA concentration. In comparison, nano SiC coating can be synthesized at 1200 °C depending on the good dispersion of SCA (with a SCA concentration of 50 vol\%). The formed SiC coating contributes to much higher peak oxidation temperature (812.1 °C) than 678.0 °C of the pure expanded graphite. Meanwhile, the oxidation activation energies of expanded graphite are remarkably improved from 149.15 kJ/mol to 176.16 kJ/mol (based on Kissinger method), attributing to the derived nano SiC and SiCxOy coating.",

keywords = "Expanded graphite, Oxidation resistance, SiC coating, Silane coupling agent",

author = "Ning Liao and Yawei Li and Jiangbo Shan and Tianbin Zhu and Shaobai Sang and Dechang Jia",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd and Techna Group S.r.l.",

year = "2018",

doi = "10.1016/j.ceramint.2017.11.110",

language = "英语",

volume = "44",

pages = "3319--3325",

journal = "Ceramics International",

issn = "0272-8842",

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number = "3",

}

TY - JOUR

T1 - Improved oxidation resistance of expanded graphite through nano SiC coating

AU - Liao, Ning

AU - Li, Yawei

AU - Shan, Jiangbo

AU - Zhu, Tianbin

AU - Sang, Shaobai

AU - Jia, Dechang

PY - 2018

Y1 - 2018

N2 - Expanded graphite with nano SiC and amorphous SiCxOy coating was successfully prepared through pyrolysing silane coupling agent (SCA), where the grafting of SCA dominated the final products. The results show that mainly amorphous SiCxOy coating covers expanded graphite at 1000 °C, regardless of the SCA concentration. In comparison, nano SiC coating can be synthesized at 1200 °C depending on the good dispersion of SCA (with a SCA concentration of 50 vol%). The formed SiC coating contributes to much higher peak oxidation temperature (812.1 °C) than 678.0 °C of the pure expanded graphite. Meanwhile, the oxidation activation energies of expanded graphite are remarkably improved from 149.15 kJ/mol to 176.16 kJ/mol (based on Kissinger method), attributing to the derived nano SiC and SiCxOy coating.

AB - Expanded graphite with nano SiC and amorphous SiCxOy coating was successfully prepared through pyrolysing silane coupling agent (SCA), where the grafting of SCA dominated the final products. The results show that mainly amorphous SiCxOy coating covers expanded graphite at 1000 °C, regardless of the SCA concentration. In comparison, nano SiC coating can be synthesized at 1200 °C depending on the good dispersion of SCA (with a SCA concentration of 50 vol%). The formed SiC coating contributes to much higher peak oxidation temperature (812.1 °C) than 678.0 °C of the pure expanded graphite. Meanwhile, the oxidation activation energies of expanded graphite are remarkably improved from 149.15 kJ/mol to 176.16 kJ/mol (based on Kissinger method), attributing to the derived nano SiC and SiCxOy coating.

KW - Expanded graphite

KW - Oxidation resistance

KW - SiC coating

KW - Silane coupling agent

UR - https://www.scopus.com/pages/publications/85034860317

U2 - 10.1016/j.ceramint.2017.11.110

DO - 10.1016/j.ceramint.2017.11.110

M3 - 文章

AN - SCOPUS:85034860317

SN - 0272-8842

VL - 44

SP - 3319

EP - 3325

JO - Ceramics International

JF - Ceramics International

IS - 3

ER -

Improved oxidation resistance of expanded graphite through nano SiC coating

Abstract

Keywords

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