YBa_2Cu_3O_(7-δ)高温超导材料微波表面阻抗的研究  

MICROWAVE SURFACE IMPEDANCE OF HIGH T_c SUPERCONDUCTOR YBa_2Cu_3O_(7-δ) CERAMICS

作　　者：罗正祥[1] 卢剑[1] 苏洪[1] 张其劭[1] 李建平[2] 

机构地区：[1]电子科技大学,成都610054 [2]西北有色金属研究院

出　　处：《低温物理学报》1991年第1期49-58,共10页Low Temperature Physical Letters

基　　金：国家超导技术联合研究开发中心资助

摘　　要：本文采用实验方法对高 T_c 超导材料 YBa_2Cu_3O_(7-6)块材的微波表面特性进行了研究,探讨了材料制备的工艺参数同微波性能的关系;还采用单腔多模和部分置换的方法,在 2cm 和3cm 频段,成功地测试和计算了高 T_c 超导材料 YBa2Cu_3O_(7-6)块材样品,在77K 时微波表面阻抗同工作频率的关系.其方法简单,测试准确,重复性好,对进一步研究高温超导体在微波频率下的表面物理特征有重要意义.The microwave surface characteristics of YBa2Cu3O7-δ bulk samples were studied through experimental methods The interrelation between the microwave surface resistance of YBCO bulk samples and the fabrication technological parameters are discussed in this paper.A multi-mode microwave cavity was designed,and the microwave surface impedance of the samples was successfully measured at 3 cm-2 cm band and ar 77 K with the replacement method.This method is simple,accurale and good in repeatability.And it will certainly help to further study ihe microwave surface physical characteristics of the high Tc superconductor materials.

关 键 词：YBA2CU3O7-Δ 微波表面阻抗 

分 类 号：TM262[一般工业技术—材料科学与工程]