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Carbon Content Influences on Superconductivity of BSCCO HTS by SSR and SHS
Soh, Dea-Wha,Korobova, Natalya,Zhanguo, Fan 明知大學校 産業技術硏究所 2003 産業技術硏究所論文集 Vol.22 No.-
Abstract - Bi_2Sr_2CaCu_2Ox was prepared by the conventional method of Solid State Reaction(SSR) and Self-propagating High-temperature Synthesis(SHS) method. The samples were annealed in different atmosphere in order to examine the influences of atmospheres on the carbon contents in the Bi_2Sr_2CaCu_2Ox compound. The lowest carbon content in Bi_2Sr_2CaCu_2Ox could be attended when the sample was annealed in O_2 at 800℃ for 100 hours. The CO_2 in air pollute the samples and increase the carbon content in the sintering process. The critical current density of the Bi_2Sr_2CaCu_2Ox samples will decrease with the increasing carbon contents in the samples. The impurity carbon will deposit in the grain boundary, which makes lower critical current density.