Solution deposition approach to high J_c coated conductor fabrication

Journal Article · Sat Jan 01 04:00:00 EST 2005 · IEEE Transactions on Applied Superconductivity

DOI:https://doi.org/10.1109/TASC.2005.848688· OSTI ID:1003278

Sathyamurthy, Srivatsan ^[1]; Paranthaman, Mariappan Parans ^[1]; Bhuiyan, Md S ^[1]; Payzant, E Andrew ^[1]; Lee, Dominic F ^[1]; Goyal, Amit ^[1]; Li, Xiaoping ^[2]; Kodenkandath, Thomas ^[2]; Schoop, U. ^[2]; Rupich, Marty ^[2]

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1. ORNL
2. American Superconductor Corporation, Westborough, MA

Great strides have been made in YBCO coated conductor fabrication using the RABiTS approach in the past few years and critical current densities (J{sub c}) of over 3 MA/cm{sup 2} on 10 meter long tapes have been achieved. Solution deposition for buffer layer processing has the potential to reduce the process complexity and make the conductor fabrication more cost-effective. In our work, we have demonstrated that several of the standard buffer layers can be replaced by sol-gel processed lanthanum zirconium oxide (LZO) layer. A J{sub c} of about 2 MA/cm{sup 2} has been demonstrated on LZO films for pulsed laser deposited YBCO and J{sub c} up to 1.5 MA/cm{sup 2} have been demonstrated for MOD-YBCO using a sputtered CeO{sub 2} cap layer on the sol-gel LZO films. Solution processed buffer layers have been found to have rapid growth kinetics which could potentially mean high rate processing of these buffer layers. Using simulated ex-situ YBCO annealing studies, it has been determined that the performance of 80-120 nm thick LZO films is comparable to the standard 3-layer vapor deposited CeO{sub 2}/YSZ/Y{sub 2}O{sub 3} buffer stack. Using a 120 nm thick LZO layers on NiW substrates, in collaboration with American Superconductor Corp., all-solution coated conductors with the stacking sequence MOD-YBCO/Solution CeO{sub 2}/Solution LZO/NiW, critical currents of up to 140 A/cm has been measured. Such high critical currents on an all-solution conductor offers promise for cost-effective scale-up of coated conductor processing.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: OE USDOE - Office of Electric Transmission and Distribution; EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1003278
• Journal Information: IEEE Transactions on Applied Superconductivity, Journal Name: IEEE Transactions on Applied Superconductivity Journal Issue: 2 Vol. 15; ISSN 1051-8223
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNEALING
BUFFERS
CRITICAL CURRENT
DEPOSITION
FABRICATION
KINETICS
LANTHANUM
LASERS
METERS
PERFORMANCE
PROCESSING
SUBSTRATES
SUPERCONDUCTORS
ZIRCONIUM OXIDES