Abstract
The liquidus compositions of Y, Sm, Gd, Dy and Yb for a melt with a Ba to Cu ratio of 3 to 5 has been investigated by a) dipping thermally equilibrated (held in the furnace for at least 10 min) MgO single crystals into the melt and analyzing the melt stuck to the MgO by ICP; b) dipping a relatively cool not thermally equilibrated Al2O3 polycrystalline rod into the melt (i.e. effective quenching) and analyzing the melt stuck to the rod by ICP. The measurements have been made in the temperature range from approximately 950° C up to about 1300° C. Following thermodynamic calculations, expressions for the liquidus lines are derived and the enthalpy of dissolution for the various RE123 and RE211 are calculated to be nearly the same for the same melt composition. Nevertheless a small increase of the enthalpy of dissolution with increasing peritetic temperature could be detected.
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Krauns, Ch., Tagami, M., Sumida, M., Yamada, Y., Shiohara, Y. Liquidus compositions of RE-Ba−Cu-Oxides (RE=Y, SM). Advances in Superconductivity VI, pp. 767–770. Tokyo: Springer 1994
Lee, B.J., Lee, D.N.: Thermodynamic evaluation for the Y2O3−BaO−CuO x system. J. Am. Ceram. Soc.74, (1) 78 (1991)
Maeda, M., Kadoi, M., Ikeda, T.: The phase diagram of the YO1.5−Ba−CuO ternary system and growth of YBa2C3uO7 single crystals. Jpn. J. Appl. Phys.28, (8), 1417 (1989)
Ogawa, N., Hirabayashi, I., Tanaka, S.: Preparation of a high-J c YBCO bulk superconductors by the platinum doped melt growth method. Physica C177, 101 (1991)
Zhang, W., Osamura, K., Ochiai, S.: Phase diagram of the BaO−CuO binary system. J. Am. Ceram. Soc.73 (7), 1958 (1990)
Iandelli, A., Palenzona, A.: Crystal chemistry of intermetalic compounds. In: Gschneidner jr., K.A., Eyring, L. (eds.) Handbook on the Physics and Chemistry of Rare Earths, vol. 2, p. 22. Amsterdam: North Holland 1979
Haasen, P.: Physikalische Metallkunde, 2nd edn. Chap. 5.2.2, Berlin: Springer 1984
Plewa, J., Altenburg, H., Hauck, J.: Thermodynamische Analyse von YBa2CuO7-x. Z. Metallkd.84 (9) 652 (1993)
Kinzoku bussei kisou kouza 5, Kinzoku ekitai no kouzo to bussei, p. 394. Tokyo: Maruzen 1978
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Krauns, C., Sumida, M., Tagami, M. et al. Solubility of RE elements into Ba−Cu−O melts and the enthalpy of dissolution. Z. Physik B - Condensed Matter 96, 207–212 (1994). https://doi.org/10.1007/BF01313285
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DOI: https://doi.org/10.1007/BF01313285