Ca替代和Ag_2O添加的YBa_2Cu_4O_8超导材料的制备与超导电性  

Preparation And Progenies of YBa_2 Cu_4O_8 Superconducting Materials With Ca-Supstitution And Ag_2 O-Addition

作　　者：程国生[1] 郭汉生[1] 何艾生[1] 田玉珂 李云 赵永刚 张金仓[1] 

机构地区：[1]河南师范大学物理系,清华大学物理系,北方工业大学物理系

出　　处：《低温与超导》1994年第2期31-35,共5页Cryogenics and Superconductivity

摘　　要：改进了高氧压与添加催化剂工艺，利用普通的固态反应法在一个大气氧压下不加任何催化成份成功地制备出了Ｙ１－ｘＣａｘＢａ２Ｃｕ４Ｏ８超导块材，从而大大简化了制备工艺，同时研究了Ａｇ２Ｏ添加的同类材料的合成，讨论了不同Ｃａ替代浓度（Ｘ＝０～０．１５）和Ａｇ２Ｏ添加量对材料结构和超导电性的影响．By improving the technique of preparation under hi gb oxygen pressure and catalysis addition, we haye successfully prepared the Y1-xCaxBa2Cu4O8 bulk superconducting materials with ordinary solid state reaction methods under flowing oxygen at one atomsphere pressure .At the same time,the Y1-xCaxBa2Cu4O8 samples with Ag2O addition are obtained and the effect of various Ca-substituting content and Ag2O addition concentration on the structure and superconductivity are also discussed.

关 键 词：BaCu4O8 超导材料 银 制备 

分 类 号：TM263[一般工业技术—材料科学与工程]