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Pre-sintering densification phenomenon of YBa2Cu3O7−y in the presence of non-equilibrium Ba-Cu-O compounds

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Abstract

The dynamic sintering behaviour of YBa2Cu3O7-y containing Ba-Cu-O and other nonequilibrium impurity phases was investigated through dilatometry. It revealed the occurrence of subsidiary shrinkage just prior to the solid-state sintering. Densification tests also showed a rapid increase in the apparent density in the temperature range between 920 and 940 °C. X-ray diffraction analysis and optical microscope observations verified the correlation with the Ba-Cu-O phases. The phenomenon was attributed to the effect of rearrangement densification exerted by the transient liquid from Ba-Cu-O and to the reaction sintering densification when Ba-Cu-O reacts with other phases during heating.

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Authors and Affiliations

  1. Materials Research Laboratories, Industrial Technology Research Institute, 31015, Chutung Hsinchu, Taiwan

    N. Yang, C. L. Yang & P. T. Wu

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  1. N. Yang
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  2. C. L. Yang
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  3. P. T. Wu
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Yang, N., Yang, C.L. & Wu, P.T. Pre-sintering densification phenomenon of YBa2Cu3O7−y in the presence of non-equilibrium Ba-Cu-O compounds. J Mater Sci 27, 1978–1982 (1992). https://doi.org/10.1007/BF01107227

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  • DOI: https://doi.org/10.1007/BF01107227

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