Abstract
We developed an x-ray microdiffractometer using synchrotron radiation with which we analyzed microcrystal structures of heterogeneities in Tl-1223 superconducting wires prepared by different processes, i.e., partial melt and solid/liquid phase reaction. Samples with the nominal composition (Tl0.5Pb0.5)1(Sr0.8Ba0.2)2Ca2Cu3O9 were irradiated by focused SR x-rays of 6 μm × 8 μm size. The diffracted x-rays were two-dimensionally detected with an imaging plate. From crystal structure analysis, we identified the heterogeneities as BaPbO3 and (CaSr)2Cu1O3 which are present in Tl-1223 superconducting wires prepared by both processes. This suggested that these heterogeneous phases coexist with the stable phase in the Tl-1223 phase diagram. Consequently, it is necessary to develop a new processing method such as low temperature annealing or a suitable O2 pressure control method.
Similar content being viewed by others
References
M. Murakami, M. Morita, K. Doi, K. Miyamoto, and H. Hamada, Jpn. J. Appl. Phys. 28, L399 (1989).
M. Murakami, M. Morita, K. Doi, and K. Miyamoto, Jpn. J. Appl. Phys. 29, 1189 (1989).
T. Doi, M. Okada, A. Soeta, T. Yuasa, K. Aihara, T. Kamo, and S. Matsuda, Physica C 183, 67 (1991).
T. Matsumoto, K. Aihara, and M. Soeta, Hitachi Rev. 39, 55 (1990).
H. Kumakura, K. Togano, E. Yanagisawa, J. Kase, and H. Maeda, Jpn. J. Appl. Phys. 29, L1652 (1990).
S. Adachi, H. Adachi, Y. Ichikawa, K. Setsume, and K. Wasa, Jpn. J. Appl. Phys. 30, L1110 (1990).
T. Itoh and H. Uchikawa, J. Cryst. Growth 91, 414 (1988).
P. Kirkpatrick and A. V. Baez, J. Opt. Soc. Am. 38, 766 (1948).
T. Hirano, F. Higashi, and K. Usami, Rev. Sci. Instrum. 63, 5602 (1992).
Y. Hirai, I. Waki, K. Hayakawa, K. Kuroishi, Y. Yasaka, N. Kanaya, Y. Satow, and S. Sato, Nucl. Instrum. Methods A327, 256 (1993).
M. Okada, A. Okayama, T. Morimoto, T. Matsumoto, K. Aihara, and S. Matsuda, Jpn. J. Appl. Phys. 27, L185 (1988).
F. Izumi, Nippon Kessho Gakkaishi (J. Crystallogr. Soc. Jpn.) 27, 23 (1985) (in Japanese).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Hirano, T., Usami, K. Microanalysis of crystalline phases in Tl-1223 superconducting wire using an x-ray microdiffractometer. Journal of Materials Research 9, 1122–1125 (1994). https://doi.org/10.1557/JMR.1994.1122
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/JMR.1994.1122