The Role of Platinum in Melt-Processed YBa2Cu3O7-x Superconductor with Y2BaCuO5 Additions
Tremendous experimental effort has been expended recently to understand the role of Y2BaCuO5 (211) inclusions as pinning centers in melt-processed YBa2Cu3O7-x (123). Numerous studies have shown that the presence of 211 inclusions results in a significant increase in the critical current density. In our effort, a series of melt-processed 123 samples with different amounts of 211 (5, 10, 15, and 20 wt%) and platinum (0.1, 0.3, and 0.5 wt%) additions to a 123 pellet (with 211 as a substrate) were prepared by a melt-processing method. The capillary flow of liquid from the top (123) pellet to the bottom (211) pellet was studied, and a correlation between the effect of 211 and platinum additions on the magnetization critical current density for both top and bottom pellets is discussed.
KeywordsWeight Percent Critical Current Density Capillary Flow Peritectic Temperature High Critical Current Density
Unable to display preview. Download preview PDF.
- 6.D.M. Kroeger, A. Goyal, Z.L. Wang, F.A. List, and K.B. Alexander, p. 329 in “HTS Materials, Bulk Processing & Bulk Applications,” C.W. Chu, W.K. Chu, P.H. Hor, and K. Salama, eds., World Scientific Publishing, Singapore (1992).Google Scholar
- 7.T. Izumi, Y. Shiohara, and Y. Nakamura, p. 280 in “Proceedings of the International Workshop of Superconductivity,” Materials Research Society, Pittsburgh (1992).Google Scholar
- 9.G. Kozlowski, W.E. Endres, and C.E. Oberly, “Proceedings of the 1993 International Workshop on Superconductivity,” June 28-July 1, 1993, Hakodate, Hokkaido, Japan.Google Scholar
- 10.I.K. Joeng, D.Y. Kim, Y.K. Park, K.W. Lee, and J.C. Park, Physica C 185–189: 2393 (1991).Google Scholar