Abstract
We report the fabrication of high quality YBCO film through a carbon dioxide controlled thermal-decomposition reaction. During the pyrolysis process of the YBCO gel film, the low melting-point Ba(OH)2 phase was converted to a high melting-point BaCO3 phase when CO2 was introduced into the heat treatment atmosphere, thus resulting in a quite smooth surface morphology of the pyrolyzed YBCO film; Then the BaCO3 phase was converted to Ba(OH)2 phase used as the Ba resource to produce the YBCO phase during the subsequent crystallization and annealing oxidation process. It is found that YBCO film with smooth surface and excellent superconductivity can be obtained through controlling the conversion reaction between the Ba-contained compounds by introducing adequate carbon dioxide and water vapor.
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Acknowledgements
This project is supported by the National Natural Science Foundation of China (No. 51202190 and No. 51072163), the Doctoral Fund of the Ministry of Education of China (No. 20126118120001), and the Natural Science Basic Research Plan in Shaanxi Province of China (Program No. 2012JQ6016). This project is also supported by the Shaanxi Provincial Project of Special Foundation of Key Disciplines and the priming scientific research foundation for the junior teachers in Xi’an University of Technology.
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Lei, L., Zhao, G., Bai, Y. et al. Carbon Dioxide Controlled Thermal-Decomposition Reactions for Preparation of High Quality YBCO Films Derived from Fluorine-Free Solution. J Supercond Nov Magn 27, 23–26 (2014). https://doi.org/10.1007/s10948-013-2235-z
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DOI: https://doi.org/10.1007/s10948-013-2235-z