制备过程对YBa_2Cu_3O_(7-δ)超导体输运特性、缺陷和显微结构的影响  

Effect of synthesis process on the transport property,defect character and microstructure in YBa_2Cu_3O_(7-δ)

作　　者：陈镇平[1] 苏玉玲[1] 薛运才[1] 刘海增[1] 王如梅[1] 

机构地区：[1]郑州轻工业学院应用数理系,河南郑州450002

出　　处：《郑州轻工业学院学报（自然科学版）》2002年第2期8-11,共4页Journal of Zhengzhou University of Light Industry:Natural Science

基　　金：河南省自然科学基金项目 (0 2 110 10 80 0 )

摘　　要：利用四引线电阻测量和SEM结构分析实验 ,研究了 95 0℃下不同烧结时间对YBa2 Cu3O7-δ(Y— 12 3)超导体的输运特性、缺陷和显微结构的影响 .实验表明 ,95 0℃温度条件下 ,在 12h～ 72h范围内 ,Y— 12 3体系的室温直流电导率增大 ,晶粒发育良好 ,缺陷浓度趋于饱和 .在此烧结条件下 ,Y— 12 3超导样品超导性能稳定 ,相关实验结果具有足够的可靠性和稳定性 .Under the sintering temperature of 950 ℃,the effects of sintering time on the YBa 2Cu 3O 7-δ Y-123 superconduetro's transport property,defect character and microstructure are systematically studied by the standard 4 probe method and scanning electron microscope experiments.It is found that,under the condition of 950 ℃ for 12 h～72 h calcinations,the direct current conductance at room temperature of the sample is steady,the crystal of the sample is well grown up and the concentration of defect reaches a saturation value.So under the condition mentioned above,the superconductivity of Y-123 has good stability and reliability.

关 键 词：输运特性 烧结时间 缺陷特征 显微结构 YBa2Cu2O7-δ超导体 

分 类 号：TM26[一般工业技术—材料科学与工程]