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高温超電導線材を用いた電カケーブルやモータなどの電カ・産業機器は、コンパクトな形状で大容量送電や大出力を可能にし、既存の電カケーブルや産業機器に比べて交流損失を低減することが可能であることから、省エネルギー、地球温暖化対策に貢献できることが期待されている。当社では、高電流密度・低損失などの特性を有し、コンパクトで更なる大容量送電を可能とするイットリウム系薄膜高温超電導線材およびそれを用いた超電導電カケーブルの研究開発を実施している。これまでに、大電流・低交流損失ケーブルに適用するための低磁性クラッドタイプの配向基板とPLO法を用いたY系線材の製造技術開発を実施した。ケーブル化に必要な性能および製造速度等を満足する要素技術を基に、高ICかつ長手方向に均ーな特性を有する配向基板ーPLO法による長尺線材の安定製造プロセスを確立した。さらに、機械式スリット加工法による細線化技術やCuメッキ技術、更には種々の実用特性を把握した。本論文では、これらの電カケーブルに適用する目的で開発を実施している配向金属基板とPLO法を用いたY系薄膜超電導線材の開発成果を報告する。, R & D efforts have been made for various applications of high temperature superconducting (HTS) conductors such as power cables, high field magnets and transformers. In Japan, a national project to develop materials and power applications using coated conductors was started in 2008. Since then we have been fabricating pulsed laser deposition (PLD)-GdBCO tapes for the development of a 5 kA, 66 kV class 3-in-One HTS model cable system as a part of this project. In order to construct the HTS cable, stable production of GdBCO tapes with high 10 is required. For this purpose, the deposition process of buffer and superconducting layers on the clad-type substrate are key technologies. We have newly installed a 300 W high power excimer laser to our PLD equipment to obtain a thick GdBCO layer. In addition, we have improved the buffer layers to enhance the critical current density. Moreover, we used a wide tape of 30 mm to obtain large production throughput, and successfully obtained uniform superconducting characteristics across the tape width. As the 10 performance of over 300 A/cm was confirmed for 100 m length, metal-clad GdBCO tapes have become promising for AC applications, especially for HTS cables aimed at lowering AC losses. In this study, we investigated the 10 values and stable manufacturing process of PLD-GdBCO tapes. Differences in characteristics were also discussed according to the length of the tape.

R & D efforts have been made for various applications of high temperature superconducting (HTS) conductors such as power cables, high field magnets and transformers. In Japan, a national project to develop materials and power applications using coated conductors was started in 2008. Since then we have been fabricating pulsed laser deposition (PLD)-GdBCO tapes for the development of a 5 kA, 66 kV class 3-in-One HTS model cable system as a part of this project. In order to construct the HTS cable, stable production of GdBCO tapes with high 10 is required. For this purpose, the deposition process of buffer and superconducting layers on the clad-type substrate are key technologies. We have newly installed a 300 W high power excimer laser to our PLD equipment to obtain a thick GdBCO layer. In addition, we have improved the buffer layers to enhance the critical current density. Moreover, we used a wide tape of 30 mm to obtain large production throughput, and successfully obtained uniform superconducting characteristics across the tape width. As the 10 performance of over 300 A/cm was confirmed for 100 m length, metal-clad GdBCO tapes have become promising for AC applications, especially for HTS cables aimed at lowering AC losses. In this study, we investigated the 10 values and stable manufacturing process of PLD-GdBCO tapes. Differences in characteristics were also discussed according to the length of the tape.

R & D efforts have been made for various applications of high temperature superconducting (HTS) conductors such as power cables, high field magnets and transformers. In Japan, a national project to develop materials and power applications using coated conductors was started in 2008. Since then we have been fabricating pulsed laser deposition (PLD)-GdBCO tapes for the development of a 5 kA, 66 kV class 3-in-One HTS model cable system as a part of this project. In order to construct the HTS cable, stable production of GdBCO tapes with high 10 is required. For this purpose, the deposition process of buffer and superconducting layers on the clad-type substrate are key technologies. We have newly installed a 300 W high power excimer laser to our PLD equipment to obtain a thick GdBCO layer. In addition, we have improved the buffer layers to enhance the critical current density. Moreover, we used a wide tape of 30 mm to obtain large production throughput, and successfully obtained uniform superconducting characteristics across the tape width. As the 10 performance of over 300 A/cm was confirmed for 100 m length, metal-clad GdBCO tapes have become promising for AC applications, especially for HTS cables aimed at lowering AC losses. In this study, we investigated the 10 values and stable manufacturing process of PLD-GdBCO tapes. Differences in characteristics were also discussed according to the length of the tape.