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Microhardness of fused periclase

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Conclusions

The microhardness of fused periclase has been studied. It is shown that the microhardness of periclase is significantly affected by defects in the structure, in particular, by the dislocation density and the presence of impurity oxides.

When fused periclase is heat-treated at 1000–1400°C which reduces the dislocation density by approximately two orders of magnitude, the microhardness of periclase is decreased. The reduction in the microhardness helps to increase the electrical resistance of the periclase as a result of both a decrease in the dislocation density and also, obviously, of the change in the packing density of the particles if the electrical resistance is measured in tubular electric heaters.

The reduction in the microhardness helps to improve the ease of pressing of the refractory articles manufactured using fused periclase.

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Authors and Affiliations

  1. Eastern Institute of Refractories, USSR

    V. A. Bron, V. A. Perepelitsyn, I. S. Raeva, T. A. Adel' & V. I. Deryavina

Authors
  1. V. A. Bron
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  2. V. A. Perepelitsyn
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  3. I. S. Raeva
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  4. T. A. Adel'
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  5. V. I. Deryavina
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Additional information

Translated from Ogneupory, No. 4, pp. 10–13, April, 1984.

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Bron, V.A., Perepelitsyn, V.A., Raeva, I.S. et al. Microhardness of fused periclase. Refractories 25, 198–202 (1984). https://doi.org/10.1007/BF01398362

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  • DOI: https://doi.org/10.1007/BF01398362

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