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Effect of MnO2 on chemical interaction between CaO and Al2O3

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Abstract

We have studied the effect of manganese dioxide (5–20 wt %) on the formation of calcium monoaluminate in the CaO-Al2O3 system during solid-state sintering of five oxide mixtures corresponding to the known calcium aluminates at temperatures from 1100 to 1400°C. X-ray diffraction examination indicated the formation of calcium manganates. The mixture of the calcium manganates melts at 1330°C, promoting the sintering process and the reaction between the calcium oxide and alumina and raising the yield of calcium monoaluminate as the dominant phase. The calcium manganates are shown to be nonreactive with the forming calcium aluminates. The X-ray diffraction results are supported by scanning electron microscopy data for a number of samples.

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Authors and Affiliations

  1. Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 3, Novosibirsk, 630090, Russia

    V. V. Sokolov, I. Yu. Filatova, I. V. Korol’kov & V. S. Danilovich

  2. ZAO KonsOM SKS, ul. Zhukova 13, Magnitogorsk, Chelyabinsk oblast, 455034, Russia

    A. P. Nefed’ev & A. I. Usherov

  3. Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia

    P. A. Poltarak

Authors
  1. V. V. Sokolov
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  2. I. Yu. Filatova
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  3. I. V. Korol’kov
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  4. V. S. Danilovich
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  5. A. P. Nefed’ev
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  6. A. I. Usherov
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  7. P. A. Poltarak
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Correspondence to V. V. Sokolov.

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Original Russian Text © V.V. Sokolov, I.Yu. Filatova, I.V. Korol’kov, V.S. Danilovich, A.P. Nefed’ev, A.I. Usherov, P.A. Poltarak, 2012, published in Neorganicheskie Materialy, 2012, Vol. 48, No. 3, pp. 334–340.

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Sokolov, V.V., Filatova, I.Y., Korol’kov, I.V. et al. Effect of MnO2 on chemical interaction between CaO and Al2O3 . Inorg Mater 48, 279–284 (2012). https://doi.org/10.1134/S0020168512020185

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  • DOI: https://doi.org/10.1134/S0020168512020185

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