Why can't regular conductors be used as such glue? i.e. you mix the ceramic superconductor powder into, say, molten copper, and make the wires out of the mix. T

Why can't regular conductors be used as such glue? i.e. you mix the ceramic superconductor powder into, say, molten copper, and make the wires out of the mix. The result would be copper wires with bits of superconductor in it. The result won't be superconducting per se, but should have less resistance than pure non-superconducting material which might be useful for certain applications.