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Low Tc Superconductor ofFurukawa Electric（ NbTi & Nb3Sn)

Furukawa Electric Co., Ltd.Hideki Ii

FCC Week 2015 (23-27 March 2015)Marriott Georgetown Hotel

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Corporate Profile

Company name: Furukawa Electric Co., Ltd.

President: Mitsuyoshi Shibata

Founded: 1884

Established: 1896

Paid-in Capital: ¥69,395 million(As of March 31, 2014)

Net sales: ¥931,781 million (Consolidated) (Years ended March 31, 2014)

¥428,301 million (Non-Consolidated) (Years ended March 31, 2014)

Employees: 47,045 (Consolidated) (As of March 31, 2014)

3,590 (Non-Consolidated) (As of March 31, 2014)

Head Office: Marunouchi Nakadori Bldg., 2-3,

Marunouchi 2-chome, Chiyodaku, Tokyo

100-8322, Japan

FCC Week 2015 (23-27 March 2015)

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Major Products and Services

Our Company has released products in a number of areas, including telecommunications, electronics, automobiles, and construction, with the three types of materials we work with at their core, namely, optics, plastics, and metals. Many of these products have attained the top global market share, and all of our products have contributed to society in numerous business areas.

　　　　　 • Optical fibers and　　　　 cables　　　 • Laser diode　　 modules　 • Optical　 amplifiers• Networkingequipment 　

Four Business

Segments

Telecommunications

Electronics andAutomotive Systems

Optics

Plastics Metals

ThreeCore Materials

•Copper wire rods　　　　　　• Industrial power 　　 　　　　　　 cables　　　　　　　　　　• Microcellular　　　　　　　　　　　　　 foam　　　　　　　　　　　　• Semiconductor 　　　　　　　　　　　　　processing　　　　　　　　　　　　　　　tapes

• Wire harnesses and electronic components for 　　　　 automobiles 　　 • Components for　　　　　 electronic equipment • Magnet wires

　　　　　　　　　　　　• Copper foil　　　　　　　　　　 　• Wrought　　　　　　　　　 copper products 　　　　　　 for electronics　　　　　　• Copper tubes for　　　　 air conditioning• Superconducting wire

Superconducting wire

Energy and IndustrialProducts

Materials

FCC Week 2015 (23-27 March 2015)

Feature

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HIGH TECHNOLOGYSophisticatedmetal compositetechnology

CUSTOMIZATIONVarious conductordesigns satisfycustomer demands

HIGH QUALITYHigh-precisioncabling technology

NbTi wire with various Cu ratio & filament size

Low ac loss NbTi wire High Jc Nb3Sn wire High strength Nb3Sn wire

Al-stabilized NbTi Rutherford cable NbTi Rutherford cable with cored bar

NbTi Rutherford cable with high-precision

FCC Week 2015 (23-27 March 2015)

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Increasing Jc of Bronze Method Nb3Sn

Items 2008 design 2012 design

Strand final diameter (mm) 0.83±0.005 0.83±0.005

Cu/Non-Cu ratio 1.0 ±0.1 1.0 ±0.1

Diffusion Barrier Ta Ta

Bronze composition (wt%) 16Sn-0.3Ti 15.7Sn-0.3Ti

Filament dia. (µm) 3.3 (nominal) 2.3 (nominal)

FCC Week 2015 (23-27 March 2015)

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React & Wind Nb3Sn Conductor

Superconductor Bronze- processed Nb3Sn

Reinforcement Nb-rod-method Cu-20vol%Nb

Diameter 0.8mm

Cu/CuNb/non-Cu 20%/35%/45%

Filament diameter 3.3μm

Twist pitch(Direction)

20 mm (S)

Number of strands 16

Heat treatment 670℃×96hr

Dimensions(After prevending) 6.5mmwx1.55 mmt

Cabling pitch(Direction)

65 mm (Z)

(a) Strand

(b) Rutherford cable

24mm (S)

This work was performed under collaboration with HFLSM, IMR, Tohoku University.

Pre-bending method

bending strain < 1%

Nb rod method Cu-Nb reinforced Nb3Sn

FCC Week 2015 (23-27 March 2015)

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React & Wind Nb3Sn Conductor

This work was performed under collaboration with HFLSM, IMR, Tohoku University.

“Nb rod method Cu-Nb reinforcement” &“pre bending effect” realized React & Wind Nb3Sn conductor

FCC Week 2015 (23-27 March 2015)

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Head Office, Factory

Overseas Subsidiaries and Affiliates

Nikko Factory

FEC(Tokyo)

FSL(Beijing)

FEEL(London)AFI

(Detroit)

SPI(Albany)

Global Network for Superconductor

FCC Week 2015 (23-27 March 2015)