Recent Development for REBaCuO Coated Conductors in China

Transcription

1 IO-12, 17:40-18:05 pm Monday, September 12 Recent Development for REBaCuO Coated Conductors in China Chuanbing Cai Shanghai Key Laboratory for High Temperature Superconductors, Shanghai University, China

2 Outline 1 China Research & Industrialization on 2G HTS Tapes 2 Advance in Cost-effective 2G HTS Tapes in Shanghai 3 Part of Power Application Demos in China

3 Technologies Applied in China for Textured Template of 2G HTS Tapes RABiTS IBAD?<8:5*,5) ISD!"##$%& '()*+,#-.%%),# CeO 2 YSZ Y 2 O 3 Texture NiW /0123&14',*&)5-6)78),+94 :;<=)*$%&>- LaMnO 3 or CeO 2 Homo-epi MgO IBAD-MgO Untextured Metal 3&14',*&)5-6@AB94:;<=)*$%&>- CeO 2 Homo-epi MgO ISD MgO Untextured Metal

4 Main Groups and Technical Routes for 2G HTS Tapes in China R&D R & D with Industry Partners!"#"$%&'()%*+,#(( -(./0+#1%2(3$%1/"%# 4+5"%(6$2"% 789(6$2"% 1":1+%"0( +/1":1+%"0( ABCD@ ;<= 1$,"(><$(.4?@ 36@ AB@ Tsinghua Uni.!! " " E Beijing Tech. Uni.! " " " E Northwest Inst. Non-Metal! " " " E( Southwest Jiaotong Uni.! E IEE CAS E Uni. of Electr. Sci.Tech. China R2R!! Beijing GRINM R2R R2R Suzhou Advanced Materials(SAMRI) R2R R2R Shanghai Jiaotong Uni. /Shanghai Supercond. R2R R2R R2R Technol. Co. Ltd (SSTC) Shanghai Uni. /Shanghai Creative Supercond. Co. Ltd(SCSC) R2R R2R! R2R *R2R: reel-to-reel system built up

5 HTS Coated Advanced Materials Institute!! Textured Oxide Buffers on Untextured Tape via IBAD!! Epitaxial HTS Films on Textured Oxide Buffer via MOCVD MOCVD-HTS Layer IBAD Oxide Buffer on Untextured Hastelloy Protection

6 HTS Coated Jiaotong University & Spinning-off company, SSTC!! Textured Oxide Buffers on Untextured Tape via IBAD!! Epitaxial HTS Films on Textured Oxide Buffer via PLD or PLD-HTS Layer Oxide Buffer on Textured or Untextured Protection Crystalliztion

7 HTS Coated University & Spinning-off Company, SCSC!! Textured Oxide Buffers on Textured or Untextured Tape via RABiTS or IBAD!! Epitaxial HTS Films on Textured Oxide Buffer via MOD Shanghai Creative Supercond. Technol. Co. Ltd or MOD-HTS Layer Oxide Buffer on Textured or Untextured Coating & Pyrolysis Slitting & Package Protection Crystalliztion

8 R&D at the University of Electronic Sci. & Tech. China!! Convention Architectures for IBAD-based Coated Conductors, such as Superpower Inc. below ~50 nm Sputtering YALO Electrolytic Polishing surface RMS<2 nm!! Emerged Double Sides of HTS Layers in China ~1 µm MOCVD YBCO ~50 nm Sputtered LMO ~20 nm Homo-epi MgO ~10 nm IBAD MgO SDP 1 µm RMS~1-2 nm ~1 µm MOCVD YBCO Developed at UESTC via MOCVD Improved Processing Efficiency, Resultant Performance, and then Cut-down of Cost "

9 Solution Deposition Planarization of Long-length Flexible Substrates Raw Tape RMS~25 nm!!!! R2R SDP tool built up Up to 100m, 24 layers/18h Surface RMS: nm High Uniformity Raw Hastelloy Tape

10 R&D at the University of Electronic Sci. & Tech. China Flat Surface of MOCVD-derived REBaCuO Films with the thickness of 200nm, Jc~7 MA/cm 2 (77K, s.f) High-textured MOCVD-REBaCuO Films with the thickness of 1000nm Ic~350 A/cm 2 77K, Self field

11 R&D at the University of Electronic Sci. & Tech. China "! Texture and superconducting properties for bi-sided MOCVD-HTS Tapes ( Side1 Side2 Side2 Side1 Side2 Side1 Side2 Side1

12 Structure and Properties for 2G HTS High Critical Current Density! Critical current density of 5 MA/cm 2 77K, s. f) Excellent High Field Performance at Low Temperatures! Critical current of 1000 A/cm (width) at 4.2K and 9T Advanced Low Resistance Superconducting Wire Joint!Total resistance of a single joint can be as low as 2.3 n!lowest ever achieved for commercial wires Superior Lamination Technique! Enhanced mechanical performance and quench current Hastelloy Substrate Al 2 O 3 Blocking Layer Y 2 O 3 Buffer Layer MgO Seed Layer CeO 2 Cap Layer YBCO Superconducting Layer A g Overlayer Cu Stabilizing Layer

13 Commercialization of 2G wires fabrication in SSTC 10 mm width Inductive Ic at 77K Slicing and lamination

14 Outline 1 China Research & Industrialization on 2G HTS Tapes 2 Advance in Cost-effective 2G HTS Tapes in Shanghai 3 Part of Power Application Demos in China

15 Cost-effective Technology Route Developed at Shanghai Uni. & Production Line at Shanghai Creative Supercond. Technol. Co. Ltd.(SCSC) Electopolish of Substrate Sputtering Buffer MOD HTS Layer Lamination Coating and Low-temperature Pyrolysis MOD-RBaCuO High-temperature Crystallization "! Cost-effective MOD #! Non-vacuum, low cost tools #! Easy and accurate to modify composition #! 100% utilization of precursor solution #! Readily scale up for wide-web process #! Dirty films, but helpful for pinning "! Independently developed pilot lines #! Smart control system #! In-situ quality inspection

16 Reel-to-Reel Production Line Spinning off from Shanghai University Spin-off For buffer layers Research Level R2R Sputtering System Industry-level Sputtering Production Line NSFC MOST-863/973 Project STCSM-Key Project Shanghai Municipal Key Project Spin-off esearch Level R2R MOD System For HTS layers Industry-level MOD Production Line

17 On-line RHEED Observation for Texture Evolution of Oxide Buffer on Untextured Tape!!Peak intensity of RHEED pattern for using PVD tools!!increasing intensity at proper time widows 50s 220s Copyright 2003 Fair Isaac Corporation. All rights reserved.

18 Optimization for IBAD-buffer Layers at Various Running Rates!!High-rate realization for IBAD buffer layers as fast as 160 mph, based on RHEED 110 mph 135 mph 160 mph 0 s 9 s 9 s 6 s 6 s 6 s 6 s 6 s 6 s 15 s 21 s 27s 33 s 39 s 45 s

19 On-line RHEED Check for Texture of Kilometer s Oxide Buffer on Untextured Metallic Tapes

20 Evaluation Method Developed for Texture of Oxide Buffer "! Direct comparison of time dependence of In-situ RHEED pattern and ex-situ x-ray Phi scanning 024 "! Characteristic Method Developed For in-situ Check of Texture Copyright 2003 Fair Isaac Corporation. All rights reserved.

21 Evaluation for Surface Quality of Oxide Buffer and Its Effect on Resultant Superconducting Performance Flat area percent based on AFM Profile height distribution Copyright 2003 Fair Isaac Corporation. All rights reserved. J c =2.4 MA/cm 2 J c =2.0 MA/cm 2 Dependence of Jc on the standard deviation of profile height distribution for the buffer surface

22 Industrial Process for MOD-RBaCuO Coated Conductors Solution Preparation Coating + Low temperature Pyrolysis Oxygenation High-temperature Crystallization

23 Key Issues for MOD-derived YBCO Coated Conductors!! To increase the production rate "! Shorter Pyrolysis Time: Low-fluorine ISTEC/AMSC/Tsinghua/");TFA-Anhydride(ICMAB); Additions such as DEA/TEA (SNL/SHU") /PEG(ICMAB,Tsinghua") "! Less Crystallization Time: Low ambient pressure(snl/amsc"); Fast gas flow!! To improve performance "! Increased thickness of YBCO layer "! Enhanced flux pinning via doping µm YBCO by single MOD coating developed in Shanghai University "! Improved morphology via doping Copyright 2003 Fair Isaac Corporation. All rights reserved.

24 Dramatic Reduction For Pyrolysis Time of MOD #G < 0 Possible reaction #G 0 Balanced reaction #G > 0 Impossible reaction #! = $ "#! % $ "#!!! Pyrolysis time reduced to be as short as one minute using extremely low F-content solutions!! Smooth and dense films obtained at a pyrolysis rate as high as 25 K/min Copyright 2003 Fair Isaac Corporation. All rights reserved.

25 Texture Properties for Bilayer and Triple HTS Tapes In-plane texture Most other groups!"~4 From bilayer to triple HTS layers!#~2 HTS Bilayer (1.0~1.1 µm thick) Out-plane texture HTS Trilayer (1.4~1.6 µm thick)

26 Critical Current for Typical MOD-HTS Tapes at SCSC Ic 350~410A /12mm-w!F!(A"$#+%"G"/1((HIIJ #"KL(M"K0N Tested by THEVA Tapestar 12mm-w at 77K Four probes I c! 368A

27 Laminated with Brass and Polyimide Insulating Tapes Inductive Ic at 77K 110~130A /4mm-w, after Cu lamination Gold Medal from New Materials Expo

28 Joint Technology Development at Shanghai Uni. Copyright 2003 Fair Isaac Corporation. All rights reserved.

29 Joint Technology Development at Shanghai Uni. & SCSC!" #' Epitaxial System Commercial Products 10-9 $ Joint Resistance!" #&!" #%!" #$ Press,, and then thermal process Year2013 & before thermal process and then pressing Year 2014 ( Force Adjustable Rapid quench Year2015 Copyright 2003 Fair Isaac Corporation. All rights reserved.

30 Joint Technology Development at Shanghai Uni. & SCSC ' Lapping length 10cm Solder / material Sn-Bi " 4mm-width/Cu thickness ~5µm ()*+,-./012"(3 & % $ # Slope 5.85E-9 4mm-width/Brass Lamination 12mm-width/Cu Lamination Slope 3.92E-8 Slope 8.90E-9 /! Copyright 2003 Fair Isaac Corporation. All rights reserved.! "! #!! #"! $!! $"! %!! %"! &!! /08 3

31 Outline 1 China Research & Industrialization on 2G HTS Tapes 2 Advance in Cost-effective 2G HTS Tapes in Shanghai 3 Part of Power Application Demos in China

32 SHANGHAI ELECTRIC CABLE RESEARCH INSTITUTE 2G HTS Cable System $! Electrical Characteristics - Design 35kV/2000A ~ 120MVA $! Physical Characteristics - Materials ~ 2G HTS Wire - Length ~ 50m - HTS Conductor Length ~13km - Cold Dielectric Design $! Hardware Deliverables - Three ~50 m Long Phase Conductors - Six 35kV Outdoor Terminations 2G HTS Cable Demo at Baosteel, since Dec 2013

33 1 MW-class Transformer based on 2G-HTS tapes in Shanghai 1 MVA 10 kv/0.4 kv Shanghai Transformer Co. Ltd & Shanghai University!! Load Loss 5978W!! Load-free Loss 1485W!! Short-circuit impedance 6.85%

34 HTS Tape Power Application Research Institution Research Project Xian Hefei Suzhou Chendu HTS Tape Manufacturer Application demo Main Research Projects and Application Demo in China

35 Summary!! Main technology roadmap for 2G HTS tapes, including biaxially textured routes for buffer, and the industrial coating techniques for HTS layers.!! Research groups, and three industrial partners in China, using MOCVD, PLD, and MOD, respectively. Hundreds of meters long tapes with A/cm-w at 77K achieved.!! Recent progress for cost-effective MOD-HTS tapes in Shanghai, being successful for scaling up.!! Several HTS power application demos in China, appearing promising, while materials challenges still there. Acknowledgement: -- Z.Y. Liu, Y. J. Shanghai Creative Supercond. Technol. Co. Ltd. -- Y. Shanghai Jiaotong Univeristy -- B.W. University of Electronic Sci. & Tech. China -- X. Zong, D. Shanghai Cable Research Institute -- D. National High Magnetic Field Laboratory, USA(kind presentation help)

36 Thank you for your attention Spinning off SCST

37 Welcome visit Shanghai SCSC