Enhancement of Crystal Growth in Melt Texturing of Ca-doped Y-Ba-Cu-O Superconductors
Doping of Ca in YBa2Cu3O7-x (Y123) has been reported to enhance the critical current density in Y123. However, fabrication of large Ca doped Y123 single crystals remains challenging. The cooling temperature and the growth rate of Ca doped Y123 samples as a function of Ca concentrations is studied. Isothermal cooling at varied temperatures (1003, 1005, 1006 and 1009°C) is applied to Ca doped Y123 samples in order to determine the optimal growth condition of the samples. It is found that the optimal growth rates occur at the undercooling ranges from 10 to 30°C in samples with Ca concentration ranges from 7.5 to 25 mol%, respectively.
O. Jongprateep and F. Dogan, "Enhancement of Crystal Growth in Melt Texturing of Ca-doped Y-Ba-Cu-O Superconductors," Ceramic Transactions, American Ceramic Society, Jan 2006.
Materials Science and Engineering
Keywords and Phrases
Y-Ba-Cu-O Superconductors; Yttrium Compounds; Critical Current Density; Isothermal Cooling; Superconducting Materials
Article - Conference proceedings
© 2006 American Ceramic Society, All rights reserved.
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