Effects of TFA addition on the growth of sintered YBa₂Cu₃O_y superconductors

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• 作者：Ryusuke Kita^a ; ^{terkita@ipc.shizuoka.ac.jp} ; Keita Kuroda^a ; Teppei Kato^a ; O. Miura^b ; K. Yamada^c ; K. Kaneko^c
• 关键词：trifluoroacetic acid ; cryatal growth ; YBCO ; sintering
• 刊名：Physics Procedia
• 出版年：2012
• 期刊代码：P128_18753892
• 类别：ph
• 出版时间：2012
• 卷：27
• 期：Complete
• 页码：124-127
• 文件大小：677 K

摘要

The effects of trifluoroacetic acid (TFA) addition on the growth of a superconducting phase in sintered YBCO samples were investigated. YBCO samples with TFA addition were prepared by adding TFA (99.0%) to YBCO powder and then pressed into pellets and heated 1173 K - 1213 K for 12 - 20 hr in air. After the heat treatment, the TFA-added sample showed large grain sizes and highly c-axis oriented structures compared to pure YBCO samples, which indicates the enhancement of the grain growth of YBCO sintered samples by the TFA addition. The Jc (0) value and Jc/Jc (0T) properties of the sintered samples was improved by the TFA addition.