Effect of ZrO2 Addition on the Slag Corrosion Resistance of MgO-Al2O3 Spinel

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  • MgO-Al2O3スピネルの耐スラグ侵食性におよぼすZrO2添加効果
  • MgO Al2O3 スピネル ノ タイスラグ シンショクセイ ニ オヨボス ZrO2 テンカ コウカ

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Abstract

The changes in the microstructure and slag corrosion resistance of MgO-Al2O3 spinel due to the addition of ZrO2 were investigated. Densification due to ZrO2 addition was significant at the stoichiometric composition of the spinel（MgO＝50mol％）. Furthermore, the densification began at lower sintering temperatures along with the ZrO2 addition, which was confirmed in the sintered bodies containing２vol％ of ZrO2. With increasing the relative density of the sintered bodies, the slag corrosion resistance was improved. In the specimens of２vol％ ZrO2 addition, the slag corrosion resistance was higher than the ZrO2-free specimens with similar relative densities. In the case of 10 vol％ ZrO2 addition, however, degradation in slag resistance was observed. It was finally concluded that the improvement in the slag resistance was resulted from the increase in slag viscosity originating in the elution of ZrO2 component.

Journal

  • Taikabutsu

    Taikabutsu 63 (6), 279-286, 2011-06-01

    The Technical Association of Refractoreies,Japan

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