Abslracl. W e have measured the pressure effects on the superconducting T, and the current density/, of the YBaCuO (123) phase and the BiSrCaCuO (2223) phase up to 10 kbar. We have found that for Bi ceramics the increase in J , with pressure is related to the T, change, while for YBCO it is due to the Josephson medium weak-link eflects. This result provides the evidence that in Bi compounds strongcurrent Josephson contacts are possible. The influence of high magnetic fields on the Josephson critical current is briefly discussed.
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