名义组分为Y6Ba16Ox的纳米超导材料

摘要

Nanoscale nominal characteristics Y6Ba11 Cu160x 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 ofYl23 and Y211 was 1: O. 14 in moles, and we compared the XRD with the XRD of Y1Ba2Cu307_x. The Tonset was 86. OK and the △Tc was 6.7K, which was examined by normal four terminals method. It represented good superconductivity, and we compared it with Y1 Ba2Cu307-x. The mean grains size was about 67.1nm, which was calculated by the Scherrers equation. The paper also analyzed the fabricated materials for a mixture of reason.%采用柠檬酸盐热分解法制备了名义组分为Y<,6>Ba<,11>Cu<,16>Ox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Y<,123>和Y<,211>,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Y<,1>Ba<,2> Cu<,3>O<,7>-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T<,onst>=86.OK,转变宽度△Te=6.7K,并表现出良好的超导电性,也相应地把其与Y<,1>Ba<,2> CU<,3>O<,7>-x,进行了对比.根据Scherre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.