A high temperature superconducting system with the general composition Tl-R-X-Y, wherein: R is a Group 2A element; X is a Group 1B element; and Y is a Group 6A element is described. Preferably, the composition has the following formula Tl-Ba-Cu-O. The high temperature superconductor of the present invention has a transition temperature of about 90 K with the probability of one phase superconducting at a temperature perhaps as high as 270 K. Processes for making the high temperature superconductor are also provided.
US4994432; EP0324660 (B1); AU611753 (B2); CA1338523 (C); JPH062583 (B2)
University of Arkansas (Fayetteville, AR)
Hermann, Allen M. and Sheng, Zhengzhi, "High temperature superconductor system and processes for making same" (1991). Patents Granted. 255.