• Title/Summary/Keyword: YBCO coated conductor

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MOD-processed YBCO coated conductor on the IBAD-MgO template

  • Shin, Geo-Myung;Ko, Rock-Kil;Song, Kyu-Jeong;Yoo, Jai-Moo;Oh, Sang-Soo;Moon, Seung-Hyun;Yoo, Sang-Im
    • Progress in Superconductivity and Cryogenics
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    • v.9 no.4
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    • pp.16-18
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    • 2007

  • We report the results of MOD-processed YBCO coated conductors on the IBAD-MgO template. The precursor solution was coated on the $CeO_2-buffered$ IBAD-MgO template using a slot-die coating method, calcined at a temperature of $550^{\circ}C$, and fired at high temperatures for 2.5 h in a reduced oxygen atmosphere. The $J_C$ value of YBCO coated conductors was found to be very sensitive to the microstructure, and thus higher $J_C$ value could be achieved when the in-plane texture was higher and the difference in $T_{C,zero}$. was negligible. Optimally processed YBCO coated conductor exhibited $J_C$ value of $0.75MA/cm^2$ at 77 K in self-field, which might be due to somewhat depressed $T_{C,zero}$ of 87.3 K caused by possible $Sm^{3+}$ substitution on the $Ba^{2+}$ site.

  • https://doi.org/10.9714/psac.2007.9.4.016 인용 PDF KSCI

Investigation on stability characteristics of 2G HTS coated conductor tapes with various stabilizer thickness

  • Quach, Huu Luong;Kim, Ji Hyung;Hyeon, Chang Ju;Chae, Yoon Seok;Moon, Jae Hyung;Kim, Ho Min
    • Progress in Superconductivity and Cryogenics
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    • v.20 no.1
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    • pp.19-22
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    • 2018

  • The thermal and electrical properties of the conductor are critical parametersfor the design and optimization of the superconducting magnet. This paper presents simulation code to analyze electrical and thermal stability characteristics of the second generation (2G) high-temperature superconductor (HTS) by varying copper stabilizer thickness. Two types of commercial 2G HTS coated conductor tapes, YBCO and GdBCO were used in this study. These samples were cooled by Liquid Nitrogen ($LN_2$) having boiling at 77.3 K and an equivalent electrical circuit model for them is choosen and analysed in details. Also, an over-current pulse test in which a current exceeding a critical current was performed. From the simulation results, the influences of the copper stabilizer thickness on the stability characteristics of these samples are presented.

  • https://doi.org/10.9714/psac.2018.20.1.019 인용 PDF KSCI

Deposition of NiO on hi-axially textured Ni substrates fort YBCO coated conductor by a MOCVD method (양축정렬된 textured Ni 기판위에 MOCVD법을 이용한 YBCO coated conductor 완충층용 NiO 증착)

  • 선종원;김형섭;박순동;정충환;전병혁;김잔중
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.07a
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    • pp.531-534
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    • 2002

  • NiO buffer layers for YBCO coated conductors were deposited on hi-axially textured Ni substrates by MOCVD(metal organic chemical vapor deposition) method, using single solution source. To establish the processing condition, oxygen partial pressure and deposition temperature were changed. The surface orientation and degree of texture were estimated by X-ray diffraction, X-ray pole figure and atomic force microscopy. The FWHMs of in-plane and out-of-plane of the NiO films were about 10$^{\circ}$. The surface roughness was a function of deposition temperature. The AFM surface roughness of NiO films is in the range of 3∼10 nm, when NiO films was grown at 450∼530$^{\circ}C$.

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