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The IEC 1906 Award from the International Electrotechnical Commission (IEC)

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November 6, 2019

Sumitomo Electric Industries, Ltd. is pleased to announce that Yuichi Yamada, General Manager, Quality Assurance Department, Superconductivity Technology Division, has won the IEC 1906 Award from the International Electrotechnical Commission (IEC) and received the certificate at the FY 2019 Industry Standardization Business Award ceremony held on October 8, 2019 by the Ministry of Economy, Trade and Industry.

The theme and reasons for the award are as follows.

■Theme:
Superconductivity -
Part 24: Critical current measurement - Retained critical current after double bending at room temperature of Ag-sheathed Bi-2223* superconducting wires(IEC 61788-24)

■Reasons for award:
As the project leader of the international standard IEC 61788-24, he led discussions by incorporating opinions from experts from various countries, established a method for measuring the retained critical current after bending of superconducting wires, and set an international standard.

Yuichi Yamada, General Manager, Quality Assurance Department, Superconductivity Technology Division, with the award certificate

Yuichi Yamada, General Manager, Quality Assurance Department,
Superconductivity Technology Division, with the award certificate

*Bi2223:
A bismuth-based superconducting wire using BiSrCaCuO as the superconducting material. Sumitomo Electric produces and sells a Dynamically-Innovative BSCCO (DI-BSCCO) wire having a Bi:Sr:Ca:Cu ratio of 2:2:2:3 and a critical temperature (the temperature at which superconductivity is observed) of 110 K. BiSrCaCuO is a hard and brittle copper oxide, with the property of being weak against strain such as bending. However, Sumitomo Electric process it into a very thin wire to obtain practical superconductivity. The critical current (the current value that can flow in the superconducting state) still changes by bending. The measurement method to evaluate the change was established as an international standard. Sumitomo Electric has been using the measuring method based on this international standardized to evaluate DI-BSCCO superconducting wires.

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