DEVELOPMENT OF A NEW PROCESS FOR THE INHIBITION OF OXIDISATION IN MgO-C REFRACTORY

Graphite, used as a carbon source in a conventional magnesia-carbon (MgO-C) refractory, was coated with an inorganic precursor to prevent contact between graphite and oxygen. The coating layer thus generated could effectively protect graphite from oxygen, compared to common antioxidants. The coating...

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Bibliographic Details
Published inJournal of Ceramic Processing Research Vol. 14; no. 2; pp. 265 - 268
Main Authors Kim, E-H, Jo, G-H, Byeun, Y-K, Jung, Y-G, Lee, J-H
Format Journal Article
LanguageEnglish
Published 세라믹연구소 2013
Subjects
Carbon
Coating
Graphite
Oxidation resistance
Phenol
Precursors
Refractories
Weight loss
재료공학
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Summary:Graphite, used as a carbon source in a conventional magnesia-carbon (MgO-C) refractory, was coated with an inorganic precursor to prevent contact between graphite and oxygen. The coating layer thus generated could effectively protect graphite from oxygen, compared to common antioxidants. The coating reagent was composed of silicate and metal alkoxide, generally called the inorganic precursor, which modified the graphite surface. The modified graphite showed excellent stability at 1000 C in ambient air, whereas the graphite in a conventional MgO-C refractory reacted with oxygen and showed a significant weight loss. The reagent was coated uniformly on the graphite surface and was very efficient in preventing the oxidation of graphite. Furthermore, the shape of the prepared refractory samples remained fixed, even when the content of phenol resin was low. Consequently, ecofriendly MgO-C refractories with high oxidation resistance were successfully prepared by coating an inorganic precursor onto the graphite.
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ISSN:1229-9162
2672-152X