Crystal Growth Mechanism of YBCO Superconductors Prepared by Unidirectional Solidification Method


Article Preview

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.



Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.




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




[1] Zhou Lian: Physica C Vol. 337(2000), pp.121-129.

[2] S. Jin, T. H. Tiefel, R. C. Sherwood et al: Appl. Phys. Lett. Vol. 52, No. 24, (1988), p. (2074).

[3] K. Salama, V. Selvamanickam, L. Gao et al: Appl. Phys. Lett. Vol. 54, No. 23, (1989), p.2352.

[4] M. Murakami,M. Morita ,N. Koyama: Jpn.J. Appl. Phys. Vol. 28(1989), p.1125.

[5] Zhou L, Zhang pingxiang, Ji ping et al: Supercond. Sci. Technol, Vol. 3 (1990), p.390.

[6] N. kofanova, V. Kogan, M. Mupriyanov: Supercond. Sci. Technol, Vol. 14(2001), pp.448-451.

[7] Izumi. T, Nakamura. Y, Shiohara. Y L, Adv. Supercond, Vol. 3(1991), p.429.

[8] J C L Chow, Wai Lo, C D Dewhurst, H-T Leung et al, Supercond. Sci. Technol, Vol. 10(1997). b a b.

[9] S K Chen, L Zhou , K G Wang et al: Chinese Journal of Low Temperature Physics, Vol. 23, No. 3(2001), p.193.

[10] Hayashi,K. Kurachi, et al.: physica C, Vol. 357(2001), p.669.

[11] Gao Enzhi, LI Jinshan, Cao Haitao: Materials Science and Technology, in press.

[12] K.A. Jackson, in: Fundamentals of Metal Solidification, edited by Hu Hanqi, chapter, 3, Mechanical Industry Publications (1999).

[13] Zhang Cuiping: A study on the growth microstructure and property of bulk single domain YBCO ��REBCO superconductors�(Northwest Polytechnical University Publications, China 2005).