Title: Effect of Ag-doping in the Y-Ba-Cu-oxide high T_c superconducting materials

Authors: Jiann-Ruey Chen, Tseung-Yuen Tseng, Wen-Sze Chung

Addresses: Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30043, Taiwan, Republic of China. ' Institute of Electronics, National Chiao Tung University, Hsinchu 30039, Taiwan, Republic of China. ' Institute of Electronics, National Chiao Tung University, Hsinchu 30039, Taiwan, Republic of China

Abstract: The effects of silver doping in the Y-Ba-Cu-Oxide (YBCO) high T_c superconducting material were studied. The YBCO material were doped with 10%, and 15% silver by the addition of silver oxide or silver nitrate. Results show that the doping of silver will improve the R-T characteristics of YBCO. The major effect is that silver make the connection of grain boundaries better. Results also demonstrated many evidences indicating the importance of the way of calcination. Better calcination or sintering will make the zero resistance transition temperature (T_co) values approach 90°K in our measuring system.

Keywords: YBCO high-Tc; superconductors; silver doping; grain boundaries; zero resistance transition temperature; calcination; sintering; superconducting materials.

DOI: 10.1504/IJMPT.1993.036550

International Journal of Materials and Product Technology, 1993 Vol.8 No.2/3/4, pp.395 - 401

Published online: 04 Nov 2010 *

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