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首页> 外文期刊>IEEE Transactions on Applied Superconductivity >Bi2Sr2CaCu2Ox/Agmultilayer tapes with Jc (4.2 K, 10 T) of 500,000 A/cm2 by using PAIR process
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Bi2Sr2CaCu2Ox/Agmultilayer tapes with Jc (4.2 K, 10 T) of 500,000 A/cm2 by using PAIR process

机译：使用PAIR工艺的Jc（4.2 K，10 T）为500,000 A / cm2的Bi2Sr2CaCu2Ox / Ag多层胶带

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摘要

We developed PAIR (pre-annealing and intermediate rolling) process, which is a fabrication procedure for Bi2Sr2 CaCu2Ox(Bi-2212)/Ag composite tapes, in order to improve their superconducting properties. PAIR process is the combination of pre-annealing (PA) and subsequent intermediate rolling (IR) processes and is performed prior to a melt-solidification process. By performing the PAIR process, Bi-2212 grain alignment and intergrain connectivity are much improved and a large Jc enhancement can be expected for Bi-2212/Ag conductors. We study the effects of pre-annealing and intermediate rolling processes on microstructure and superconducting properties of the Bi-2212/Ag multilayer tapes fabricated by the oxide-painting and lamination method. The results show that Jc has been increased strongly by performing pre-annealing at 1133 K in oxygen (1 atm) and intermediate rolling with 25% deformation. PAIR processed samples have transport Jc-oxide (4.2 K, 10 T) exceeding 5.0×105 A/cm2. Whereas Jc -oxide for the samples melt-solidified without PAIR process remains 3.0×105 A/cm2. The enhancement of J c is assigned to the microstructure with high grain alignment and uniformity, as well as the improvement in grain connectivity achieved by the PAIR process
机译：我们开发了PAIR（预退火和中间轧制）工艺，该工艺是Bi2Sr2 CaCu2Ox（Bi-2212）/ Ag复合带的制造工艺，以提高其超导性能。 PAIR工艺是预退火（PA）和随后的中间轧制（IR）工艺的组合，在熔融固化工艺之前进行。通过执行PAIR工艺，Bi-2212的晶粒排列和晶粒间的连通性得到了极大的改善，并且Bi-2212 / Ag导体的Jc有望大大提高。我们研究了预退火和中间轧制工艺对通过氧化物喷涂和层压方法制造的Bi-2212 / Ag多层带的微观结构和超导性能的影响。结果表明，通过在氧气（1个大气压）下于1133 K下进行预退火并进行25％变形的中间轧制，可以大大提高Jc。 PAIR处理的样品的Jc氧化物传输量（4.2 K，10 T）超过5.0×105 A / cm2。而无需PAIR工艺熔融固化的样品的Jc-氧化物仍为3.0×105 A / cm2。 J c的提高被赋予具有高晶粒排列和均匀性的微结构，以及通过PAIR工艺实现的晶粒连通性的提高

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