Preparation of high Tc superconducting wire by precursor spinning method.

前驱体纺丝法制备高Tc超导线材

• 批准号: 07555490
• 负责人: GOTO Tomoko
• 金额: $ 2.69万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555490/
• 关键词: High T_c superconductor; filamentary; solution spinning; precursor filament; Y123; Nd123; critical current density; composite; Nd123高温超伝導体; 低酸素圧下での溶融凝固処理; Y123高温超伝導体; 部分溶融凝固処理; 組織変化; 高温酸化物超伝導体; 線材化; 溶液紡糸法; 前駆体繊維; 長尺化; 臨界電流密度

For practical application of high T_c superconducting magnet at 77K,the superconducting wire with high J_c at high magnetic field is needed. We have studied the preparation of the filamentary superconducting oxide using a textile fiber spinning technology for the precursor of the oxide.Long precursor filaments were prepared by dry spinning with a starting homogeneous aqueous poly vinyl alcohol solution containing Y or Nd, Ba and Cu acetates. The as-drawn filament with diameter of 250mum was pyrolyzed to remove the volatile components and heated to generate a superconducting phase. By controlling the spinning process and partially melted treatment in O_2 flow, maximum J_c value of more than 10^5A/cm^2 at 77K and 0T was attained for the filamentary Y123 superconductor.A Y123 superconducting filament of 60mum in diameter and 200mm in lenth with high J_c of more than 10^4A/cm^2 was obtained by controlling the heating process.The oxygen controlled melt growth of the Nd123 precursor filament was examined. The field dependence of the transport J_c of the filamentary Nd123 superconductor was better than that for the Y123 superconductor and more than 10^3A/cm^2 at 77K and 10T was achieved for the filamentary Nd123 superconductor partially melted in 1%O_2+Ar flow. The fabrication of multifilamentary Y123 superconducting composite was made by using the silver paste and a composite with high superconducting and mechanical propeties was prepared.

为了实际应用77K处的高T_C超导磁铁，需要在高磁场处使用高J_C的超导线。我们已经研究了使用氧化物前体的纺织纤维旋转技术来制备丝状超导氧化物。通过使用含有Y或ND，BA和CU乙酸盐的均质水乙烯基溶液干燥旋转，制备了长的前体丝。将直径为250MM的灯丝进行了热解，以去除挥发性成分并加热以产生超导相。通过控制O_2流中的旋转过程和部分融化的处理，在77K和0T的最大j_c值中最大值的Y123超导压器达到了77K和0T的最大值。AY123直径60mmum和200mm的超导丝在Like y him j_c of More Contration y More Contration the More Contration the More Contration the More Contration the More Contranty y a^2^4Aa的过程中检查了ND123前体细丝的氧气控制熔体生长。对于Y123超导体，丝状ND123超导体的传输J_C的场依赖性要好，而在77K时，在1％O_2+AR流中，在77K和77K和10T的场上达到了10^3a/cm^2。通过使用银糊和具有高超导和机械propities的复合材料制成多种Y123超导复合材料的制造。

项目成果

T.Goto (H.Tomita): "Solution spinning of a high-Tc oxide superconductor : the effect of poly (vinyl alcohol) spinning medium on the critical current density of melt-processed Y1Ba2Cu3Ox superconducting filaments" Supercond.Sci.Technol.9. 1099-1104 (1996)

T.Goto (H.Tomita)：“高 Tc 氧化物超导体的溶液纺丝：聚乙烯醇纺丝介质对熔融加工 Y1Ba2Cu3Ox 超导丝临界电流密度的影响”Supercond.Sci.Technol.9

H.Tomita, T.Goto, K.Watanabe, S.Awaji and K.Takahashi: "The field dependence of J_C for the Y123 filament spun from various spinning dope" Czechoslovak J. Phys.46Suppl.S3. 1687-1688 (1996)

H.Tomita、T.Goto、K.Watanabe、S.Awaji 和 K.Takahashi：“由各种纺丝原液纺成的 Y123 长丝的 J_C 场依赖性”捷克斯洛伐克 J. Phys.46Suppl.S3。

T.Goto, M.Konishi and M.Tonomura: "Doping effect on partialmelting of Hg_xBa_2Ca_2Cu_3Re_<0.2>O_y filament" Advance.in Cryogenic Engineering. Vol.44(to be published).

T.Goto、M.Konishi 和 M.Tonomura：“掺杂对 Hg_xBa_2Ca_2Cu_3Re_<0.2>O_y 灯丝部分熔化的影响”Advance.in Cryogenic Engineering。

T.Goto (T.Yuoka): "Field dependence of the Jc for melt-processed Y_1Ba_2Cu_3O_X filament produced by solution-spinning." Proc. 8th Int. Symp. on Superconductivity (Hamamatsu,1995). (to be published).

T.Goto (T.Yuoka)：“通过溶液纺丝生产的熔融加工 Y_1Ba_2Cu_3O_X 长丝的 Jc 场依赖性。”

T.Goto: "Preparation of high T_C oxide superconducting filaments by solution spinning" Proc. 8th US-Japan workshop on HTS. (to be published).

T.Goto：“通过溶液纺丝制备高 T_C 氧化物超导丝”Proc。