热处理条件对MgB_2带材物理性能的影响  

THE ANNEALING EFFECTS OF MgB_2 TAPES:IN SITU VERSUS EX SITU TECHNIQUE

作　　者：浦其荣[1,2] 许高杰[1,2] 王关生[1,2] 刘应玲[1,2] 丁泽军[1,2] 孙霞[1,2] 

机构地区：[1]中国科学院中国科学技术大学结构分析重点实验室,合肥230026 [2]中国科学技术大学天文与应用物理系,合肥230026

出　　处：《低温物理学报》2005年第A02期903-907,共5页Low Temperature Physical Letters

基　　金：国家自然科学基金(No.50306006)资助项目~~

摘　　要：用Mg和B的混合粉体以及用MgB2粉体作为起始材料,不锈钢作为外鞘,分别制备出MgB2超导带材,并通过不同的烧结工艺对MgB2带子进行热处理.系统地对比研究了样品在不同制备条件下的和Jc不同的内在根源,提出制备性能优异的MgB2带材的可能途径.The powder in tube method with in situ and ex situ techniques was used for fabricating the Fe sheathed MgB2 tape. Mg powder, amorphous B powder and commercial MgB2 powder were used as starting materials. The tapes were sintered at 680℃, 800℃ and 950℃ respectively. In this paper, a comparison of heating temperature dependence of Jc between the tapes prepared using the two techniques is reported, and the origin of the difference is analyzed and discussed.

关 键 词：不可逆场 临界电流密度 退火 

分 类 号：O511.4[理学—低温物理]