The Meissner Result demonstrated by levitating a magnet above a cuprate superconductor, that is cooled by liquid nitrogen Under some conditions, which include exceptionally very low temperatures, some ceramics exhibit high-temperature superconductivity (in superconductivity, "high temperature" indicates higher than thirty K). The main reason for this is not recognized, but https://dnaisolationreagents26913.blogdon.net/the-fact-about-alumina-ball-that-no-one-is-suggesting-55205771