名义组分为Y6Ba11Cu16Ox的纳米超导材料  

Preparation of nanoscale nominal characteristics Y_6Ba_(11)Cu_(16)O_x superconductor material by the citrate pyrolysis method

作　　者：胡婧婧[1] 孙爱民[1,2] 鲁彦忠[1,2] 刘恒伟[1,2] 马耀通[1,2] 

机构地区：[1]西北师范大学物理与电子工程学院,兰州730070 [2]甘肃省原子分子物理与功能材料重点实验室,兰州730070

出　　处：《低温与超导》2011年第6期38-40,共3页Cryogenics and Superconductivity

基　　金：甘肃省高等学校基本科研业务费项目(2010-2012年)资助.

摘　　要：采用柠檬酸盐热分解法制备了名义组分为Y6Ba11Cu16Ox的纳米超导材料。利用XRD对其粉体进行物相表征,发现其相是Y123和Y211的混合相,并测得两者之间的摩尔比为1∶0.14,同时把其XRD图谱与Y1Ba2Cu3O7-x的XRD图谱进行了对照分析。利用标准的四端引线法对其块体进行R-T分析,测出其起始转变温度Tonset=86.0K,转变宽度△Tc=6.7K,并表现出良好的超导电性,也相应地把其与Y1Ba2Cu3O7-x进行了对比。根据Scherrer公式计算得到样品的平均晶粒尺寸约为67.1nm。文中也分析了所制材料为混合物的原因。Nanoscale nominal characteristics Y6BanCu16Ox superconductor material was prepared using the citrate pyrolysis method. The morphology and structure of the nanoscale products were characterized by X - ray diffraction. The results indicate that the briquetting has Y123 and Y211 phase. We found that the ratio of Y123 and Y211 was 1： 0.14 in moles, and we compared the XRD with the XRD of Y1Ba2 Cu3O7-x, The Tonset was 86. OK and the ATc was 6.7K, which was examined by normal four terminals method. It represented good superconductivity, and we compared it with Y1Ba2 Cu3 O7-x. The mean grain＇s size was about 67. Irma, which was calculated by the Scherrer＇s equation. The paper also analyzed the fabricated materials for a mixture of reason.

关 键 词：氧化物超导体 纳米材料 柠檬酸盐热分解法 

分 类 号：TQ342.2[化学工程—化纤工业]