Effect of Al and Alumina Additions on Oxidation Rate of MgO-C Refractory.

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  • Alとアルミナ添加がMgO-C煉瓦の酸化速度へ与える影響

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Direct oxidation behavior of MgO-C refractories has been investigated at 1000°C in air. The amount of graphite burnout during isothermal oxidation has automatically been recorded every 1min using a thermo gravimeter (TG). In this regard, the effect of Al and/or alumina addition as well as graphite fraction on the oxidation rate has been examined. An increase in alumina content or graphite fraction enhanced oxidation rate, while an increase in Al content retarded it. X-ray diffractometry and various porosity analyses were conducted on the samples before and after oxidation test to explain the oxidation results.

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