In 1986, it was discovered that some cuprate-perovskite ceramic materials have a critical temperature above .< ref name = Bednorz > Such a high transition temperature is theoretically impossible for a conventional superconductor, leading the materials to be termed high-temperature superconductors.
In 1986, it was discovered that some cuprate-perovskite ceramic materials have a critical temperature above.
0.034 seconds.