Crystal Growth Mechanism of YBCO Superconductors Prepared by Unidirectional Solidification Method

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Y123 and Y211 powders were synthesized by solid-state reaction method. YBCO superconductor specimens were prepared by unidirectional solidification technique. The microstructure and the structural characteristics were observed by means of the optical microscope, X-ray diffraction (XRD), scanning electron microscope (SEM). The results showed that the specimen have a highly aligned structure, it was observed obvious laminated structure of Y123 crystal. Crystal growth mechanism of YBCO was investigated. Jackson's factor of Y123 crystal was calculated. Interface form was judged tentatively theoretically. The specimen was rapidly quenched by quick pulling. Solid/liquid interface structure was observed. It was concluded that a-b plane was faceted grow forms and layer growing along c-axial on a-b plane.

Info:

Periodical:

Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.

Pages:

2085-2090

DOI:

10.4028/www.scientific.net/MSF.546-549.2085

Citation:

E. Z. Gao et al., "Crystal Growth Mechanism of YBCO Superconductors Prepared by Unidirectional Solidification Method", Materials Science Forum, Vols. 546-549, pp. 2085-2090, 2007

Online since:

May 2007

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$38.00

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