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High temperature reactions between Ce2O3 and Al2O3, and the properties of the cerium aluminates formed

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Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Summary

  1. 1.

    A study has been made of the solid phase reactions in the Ce2O3-Al2O3 system. The mixtures were heated in a reducing atmosphere (hydrogen, ammonia), as a result of which the CeO2 was reduced to Ce2O3 and the latter reacted with the alumina.

  2. 2.

    Two chemical compounds are formed between Ce2O3 and Al2O3, namely: CeAl2O3 with a Perovskite type structure, and Ce2O3·11Al2O3 with aβ -alumina type structure.

  3. 3.

    The cerium aluminates are stable in a reducing atmosphere (hydrogen). The CeAl2O3 undergoes polymorphic transformations at 90±20° and 980±20° with m.p. 2075±25°. The Ce2O3·11Al2O3 melts at 1950±25°.

  4. 4.

    When cerium aluminates are heated in air they decompose to form free Ce2O2 and Al2O3. 5. Measurements were made of the dielectric constant and dielectric loss angle of samples with the compositions CeAl2O3 and Ce2O3·11Al2O3.

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Authors and Affiliations

  1. Institute of Silicate Chemistry, Academy of Sciences, USSR

    A. I. Leonov & É. K. Keler

Authors
  1. A. I. Leonov
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  2. É. K. Keler
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Leonov, A.I., Keler, É.K. High temperature reactions between Ce2O3 and Al2O3, and the properties of the cerium aluminates formed. Russ Chem Bull 11, 1819–1823 (1962). https://doi.org/10.1007/BF00921332

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  • DOI: https://doi.org/10.1007/BF00921332

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