HIGH T(C) SUPERCONDUCTOR JOINT WITH LOW-LOSS AND HIGH-STRENGTH

This paper describes a new method for joining BiSrCaCuO superconductor s (BSCCO) which realizes low microwave loss and high mechanical streng th. This method consists of two processes. In the first the BSCCO surf ace is metallized with Ag and in the second a joint is formed by using thermally curable Ag paste. With this method, we obtained a joint wit h a loss of 0.3 dB around 1.1 GHz with the co-axial cavity techniques. Furthermore, the mechanical strength of the joint was greater than th at of the BSCCO sample. From the results of DC resistance measurements and SEM observations, we attribute this good performance to the adhes ion and continuity of the metallized Ag with the BSCCO surface.