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Oxidation behaviour of magnesia-carbon materials prepared with petroleum pitch as binder

Garcia Rocha, Victoria, Menéndez, R., Santamaría, R., Blanco, C. and Granda, M. 2010. Oxidation behaviour of magnesia-carbon materials prepared with petroleum pitch as binder. Journal of Analytical and Applied Pyrolysis 88 (2) , pp. 207-212. 10.1016/j.jaap.2010.04.008

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The wetting behaviour of a petroleum pitch (modified with a surfactant) and a binder coal-tar pitch was studied using different substrates. The results show that both the pitch and the substrate have a significant influence on wetting behaviour, and consequently, on their mutual interactions during the mixing stage. Low values of surface tension and viscosity in the pitches lead to lower wetting temperatures. It was found that with petroleum coke and magnesia as substrates, the wetting occurs at lower temperatures than with graphite and carbon black for all pitches. Moreover, experiments carried out with amorphous and crystalline alumina revealed that the crystalline order affects the wetting behaviour considerably. Thus, whereas the pitch wets the corundum (crystallized alumina), it does not wet the amorphous alumina (basic, acid and neutral alumina).

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: Oxidation resistance; Carbon–magnesia composite; Petroleum pitch
Publisher: Elsevier
ISSN: 0165-2370
Date of Acceptance: 20 April 2010
Last Modified: 04 Jun 2017 09:19

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