Comparison of the behavior of the three superconductors YBCO, Bi-2212 and MgB_2 in different environmental conditions

摘要

Powders and electrophoretically produced coatings of YBa_2Cu_3O_(7-x) (YBCO), Bi_2Sr_2CaCu_2O_8 (Bi-2212) and MgB_2 superconductors were studied for their stability under different environmental conditions, such as UV radiation, various relative humidity conditions, salt spraying, temperature, water environment. It resulted that Bi-2212 is a stable compound, while YBCO is greatly affected by moisture and MgB_2 is affected by increasing temperature. All three superconductors were decomposed almost immediately after immersion in water or sea water.