, Volume 13, Issue 9–10, pp 601–606 | Cite as

Processes in the formation of direct intergrain bonds in periclase-spinel refractories

  • S. M. Zubakov
  • A. L. Dyukov


In order to obtain periclase-spinel refractories of high quality it is necessary to use chemically pure magnesite and chromite powders, and also high firing temperatures. In the high-fired periclase-spinel refractories made from these powders a quantitatively new structure is formed: the direct bonds between the crystals of periclase and chrome spinel predominate (more than 50%). The secondary spinels, fulfilling the role of bond in the grains of periclase, possess a high melting point.

In the periclase-spinel refractories containing more than 2% silica the intergrain bonds are formed as a result of the mixed solid-liquid sintering with localized crystallization of new formations of periclase and spinel from the melt. This type of process does not ensure a sufficiently high number of direct bonds between the crystals, and weakens the structure of the products by the presence of silicate interlayers.


Crystallization Periclase Silicate Chrome Chromite 
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Literature cited

  1. 1.
    S. M. Zubakov et al., Tr. Inst. Metall. i Obogashch. Akad. Nauk. KazSSR,38, 22 (1970).Google Scholar
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    A. S. Berezhnoi, Multicomponent Oxide Systems [in Russian], Naukova Dumka, Kiev (1970), p. 471.Google Scholar
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    P. P. Budnikov and K. K. Strelov, Neorganich. Materialy,4, No. 1, 104 (1968).Google Scholar
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    J. White, Refractories J.,42, No. 10, 414 (1966).Google Scholar

Copyright information

© Consultants Bureau 1973

Authors and Affiliations

  • S. M. Zubakov
    • 1
  • A. L. Dyukov
    • 1
  1. 1.Institute of Metallurgy and Beneficiation of the Academy of Sciences of the Kazakh SSRUSSR

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