含氟Y－Ba－Cu－O高温超导体稳定性与结构的研究  

Studies on the Stability and Structure of High T_c Y-Ba-Cu-O Superconductor with F Element

作　　者：钟山[1] 俞永勤[1] 陈龙武[1] 

机构地区：[1]华东师范大学化学系,华东师范大学物理系,同济大学化学系

出　　处：《高等学校化学学报》1996年第11期1661-1665,共5页Chemical Journal of Chinese Universities

摘　　要：应用ＢａＦ２、ＣｕＦ２和ＹＦ３分别部分代换ＢａＯ、ＣｕＯ和Ｙ２Ｏ３制得了一系列带有氟元素的Ｙ－Ｂａ－Ｃｕ－Ｏ高温超导体样品，其中ＢａＦ２代换ＢａＯ的摩尔量可达４５％，样品的零电阻温度为８２．５～９３．５Ｋ。应用ＸＲＤ、ＤＴＡ、ＩＲ和化学方法研究了样品的结构和稳定性。初步实验结果表明，氟元素只有少量进入超导相，但含氟的Ｙ－Ｂａ－Ｃｕ－Ｏ超导体在水蒸气和二氧化碳中的稳定性则大大提高。The samples of high Tc Y-Ba-Cu-O superconductor with F element were prepared by using BaF2,CuF2,YF3 instead of BaO,CuO,Y2O3 respectively.The substitutive ratio was about 45%. The zero-resistance temperature was 82.5～93.5K.By means of X-ray powder diffraction,infrared spectroscopy,difference thermal analysis,the structure and stability of the samples were investigated.The preliminary results show that only small amount of F element entered the superconductive phase,and made the stability of the high Tc Y-Ba-Cu-O superconductor with F element increasing greatly in the environment of water vapor and carbon dioxide.

关 键 词：高TC 超导体 稳定性 结构 含氟超导体 

分 类 号：O511.1[理学—低温物理] TM262[理学—物理]