Improvement of the oxidation stability and the mechanical properties of flexible graphite foil by boron oxide impregnation

Flexible graphite foil produced by rolling expanded graphite impregnated with boron oxide was analyzed by laser mass spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and thermogravimetry. It was shown that the modification of the graphite foil by boron oxide increases the...

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Bibliographic Details
Published inNew carbon materials Vol. 27; no. 1; pp. 12 - 18
Main Authors Savchenko, D.V., Serdan, A.A., Morozov, V.A., Van Tendeloo, G., Ionov, S.G.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.02.2012
Subjects
Boron oxide
Expanded graphite
Graphite foil
Oxidation protection
Tensile strength
Expanded graphite
Graphite foil
Boron oxide
Oxidation protection
Tensile strength
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Summary:Flexible graphite foil produced by rolling expanded graphite impregnated with boron oxide was analyzed by laser mass spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and thermogravimetry. It was shown that the modification of the graphite foil by boron oxide increases the onset temperature of oxidation by ∼ 150 °C. Impregnation of less than 2 mass% boron oxide also increased the tensile strength of the materials. The observed improvement was attributed to the blocking of active sites by boron oxide, which is probably chemically bonded to the edges of graphene sheets in expanded graphite particles.
ISSN:1872-5805
1872-5805
DOI:10.1016/S1872-5805(12)60001-8