Studies of the phase evolution of YBCO materials with different additives

Riches, J.D., Alarco, J.A., & Barry, J.C. (1998) Studies of the phase evolution of YBCO materials with different additives. Superconductor Science and Technology, 11(10), pp. 963-967.

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Abstract

Y123 samples with varying amounts of added Y211, PtO 2 and CeO 2 have been melt processed and quenched from temperatures between 960°C and 1100°C. The microstructures of the quenched samples have been characterized using a combination of x-ray diffractometry, optical microscopy, scanning electron microscopy, microprobe analysis, energy-dispersive x-ray spectroscopy and wavelength-dispersive x-ray spectroscopy. The Ba-Cu-O-rich melt undergoes complex changes as a function of temperature and time. A region of stability of BaCuO 2 (BC1) and BaCu 2O 2 (BC2) exists below 1040°C in samples of Y123 + 20 mol% Y211. Ba 2Cu 3O 5 is stabilized by rapid quenching but appears to separate into BC1 and BC2 at lower quenching rates. PtO 2 and CeO 2 additions affect the distribution and volume fractions of the two Ba-Cu-oxide phases.

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ID Code: 64046
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By (since 1996):4
Export Date: 5 November 2013
Source: Scopus
CODEN: SUSTE
Language of Original Document: English
Correspondence Address: Department of Physics, University of Queensland, QLD 4072, Australia
References: Frase, K.G., Liniger, E.G., Clarke, D.R., (1987) J. Am. Ceram. Soc., 70, pp. C204-5; DeLeeuw, D.M., Mutsaers, C.A.H.A., Langereis, C., Smoorenburg, H.C.A., (1988) Physica C, 152, pp. 39-49; Alarco, J.A., Olsson, E., Golden, S.J., Bhargava, A., Yamashita, T., Barry, J., Mackinnon, I.D.R., (1997) J. Mater. Res., 12, pp. 624-635; Riches, J.D., Alarco, J.A., Yamashita, T., Barry, J.C., (1997) Supercond. Sci. Technol., , at press; Whitler, J.D., Roth, R.S., (1991) Phase Diagrams for High T c Superconductors, 1. , Westerville: National Institute of Standards and Technology; Aselage, T., Keefer, K., (1988) J. Mater. Res., 3, pp. 1279-1291; Shitova, V.I., Mikiritcheva, G.A., Chigareva, O.G., Grabovenko, L.Y., Kuchaeva, S.K., Grebenshchikov, R.G., (1989) Phase Diagrams of High T c Superconductors, p. 9
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DOI: 10.1088/0953-2048/11/10/013
ISSN: 0953-2048
Divisions: Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 07 Nov 2013 01:00
Last Modified: 07 Nov 2013 01:00

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