US 12,439,835 B2
Connection structure for superconducting layer, superconducting wire, superconducting coil, superconducting device, and connection method for superconducting layer
Masaya Hagiwara, Yokohama Kanagawa (JP); Tomoko Eguchi, Yokohama Kanagawa (JP); Keiko Albessard, Yokohama Kanagawa (JP); and Yasushi Hattori, Kawasaki Kanagawa (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Energy Systems & Solutions Corporation, Kawasaki (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
Filed on Mar. 8, 2022, as Appl. No. 17/689,861.
Application 17/689,861 is a continuation of application No. PCT/JP2021/006370, filed on Feb. 19, 2021.
Claims priority of application No. 2020-147013 (JP), filed on Sep. 1, 2020.
Prior Publication US 2022/0199887 A1, Jun. 23, 2022
Int. Cl. H10N 60/85 (2023.01); H01F 6/06 (2006.01); H01R 4/68 (2006.01); H10N 60/01 (2023.01)
CPC H10N 60/858 (2023.02) [H01F 6/06 (2013.01); H01R 4/68 (2013.01); H10N 60/0352 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A connection structure for a superconducting layer comprising:
a first superconducting layer;
a second superconducting layer; and
a connection layer disposed between the first superconducting layer and the second superconducting layer, the connection layer including crystal grains containing a rare earth element (RE), barium (Ba), copper (Cu), and oxygen (O), the crystal grains having a grain size distribution including a bimodal distribution,
wherein the bimodal distribution includes a first distribution including a first peak and a second distribution including a second peak,
wherein a first grain size corresponding to the first peak is larger than a second grain size corresponding to the second peak, and
wherein, among the crystal grains, crystal grains having a grain size corresponding to the first distribution include a crystal grain having a plate shape or a flat shape.