Bi2212超导化合物中碳含量及其影响  

Carbon Contents and Its Effects on the Bi2212 Superconductive Compounds

作　　者：王文虎[1] 郑萍[1] 周玉琴 陈兆甲[1] 樊占国[2] 单玉桥 

机构地区：[1]中国科学院低温技术实验中心极低温物理实验室 [2]东北大学材料与冶金学院

出　　处：《低温与超导》1999年第1期12-15,共4页Cryogenics and Superconductivity

摘　　要：】通过在不同的气氛下高温热处理Ｂｉ２２１２相的超导样品，发现随块材中Ｃ杂质含量的增加，其熔化温度由８６５℃下降到８５０℃，同时其超导电性能下降。高温热处理之后，用离心浇铸法制备的Ｂｉ２２１２圆筒显示一定的超导电性（～４０Ａ／ｃｍ３），其超导电性能随Ｃ含量降低而增强。为避免圆筒在高温下变形。To treated the Bi2212 bulk materials under the different gases by high temperature. The result indicates that the melting temperature of the Bi2212 materials decrease from 865℃ to 850℃, and its the superconductive properties get down seriously with the increasement of the impurity of carbon. After annealed. the Bi2212 tubes made by the centrifugal casting method show some superconductivity (～40A/cm 2) under the low carbon content. In order to avoid the changing of its style, the treatment temperature is suitable nearly 810℃。

关 键 词：Bi2212 块材 超导电性 超导材料 碳含量 

分 类 号：TM262[一般工业技术—材料科学与工程]