The Meissner Influence demonstrated by levitating a magnet over a cuprate superconductor, which can be cooled by liquid nitrogen Below some conditions, such as exceptionally very low temperatures, some ceramics exhibit high-temperature superconductivity (in superconductivity, "high temperature" indicates above thirty K). The explanation for this is not recognized, but There https://ultra-trace-amount-of-cel05825.tnpwiki.com/48361/a_secret_weapon_for_silicon_carbide_ceramic_columns