http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
임남희,유성태,장미혜,박성진,한병성 전북대학교 전자산업개발연구소 1990 전자산업연구 Vol.1 No.-
The relations of the sintering temperature and superconductivity were investigated by the XRD pattern and critical temperature. All of the samples were annealed at the various temperatures that from 900℃ to 960℃. When the superconductor of YBa_2Cu_3O_7-8 was exposed in the air and was directly contacted with water. The samples of the surface attack by moisture and water was studied. The samples were analyed XRD, TGA. The samples of YBa_2Cu_3O7-8 which were exposed to the air for a long time have slowly decomp-sed, but the samples of YBa_2Cu_3O7-8 which were directly contacted with the D.I. water have rapidly decomposed on surface. The YBa_2Cu_3O_7-8 superconductor is chemically instable; by the reaction with humidity. The YBa_2Cu_3O_7-8 is transformed into non-superconduction phase(Y_2BaCuO_5, Ba(OH)_2, CuO) and loses is superconducting properties.