抄録
A study on connecting of supercondoctors through laser treatment was conducted. Two kinds of Bi systems i.e., 2223 phase(sintered bulk) and 2212 phase(thin film prepared on MgO substrate) were used as the substances to be connected. Powders of the system which were pasted with two kinds of solvents, 2-butoxyethyl acetate and mixture of ethyl cellulose and terpineol, were used as the medium materials. Two pieces of respective specimen filled with the medium between them were installed on a jig system and settled on an X-Y table to be exposed to laser beam irradiation. A 160-350 W output CO2 laser beam accompanied by oxygen gas blow was irradiated, along the contact line of the substance, onto the medium at a speed 10 mm/min. Before laser treatment, the electric resistance of all specimen revealed almost constant value of about 600 Ω at temperature range concerned. After laser treatment, for the specimen which used the medium powder pasted with mixture of ethyl cellulose and terpineol, Tc(end) of 67.6 K and 47.0 K was obtained for 2223 phase and 2212 phase respectively, which leads to the connection of superconductors.
