Fabrication of YBCO coated conductors using advanced TFA-MOD process

K. Nakaoka; Y. Tokunaga; J. S. Matsuda; H. Fuji; S. Koyama; R. Teranishi; T. Izumi; Y. Shiohara; T. Watanabe; Y. Yamada; T. Goto; A. Yoshinaka; A. Yajima

doi:10.1016/j.physc.2005.02.150

Fabrication of YBCO coated conductors using advanced TFA-MOD process

K. Nakaoka, Y. Tokunaga, J. S. Matsuda, H. Fuji, S. Koyama, R. Teranishi, T. Izumi, Y. Shiohara, T. Watanabe, Y. Yamada, T. Goto, A. Yoshinaka, A. Yajima

Research output: Contribution to journal › Conference article › peer-review

22 Citations (Scopus)

Abstract

We have investigated the influence of the heating rate in the calcination process on the superconducting properties in order to optimize an advanced TFA-MOD process. The increase of the heating rate makes J_c values lower, and the maximum values of HF gas generation rate higher. From TEM observation of the precursor film, the large pores and segregation of Cu elements were observed in the films at high heating rates. Consequently, it is clear that the increase of the heating rate during calcination process caused abrupt HF gas generation leading to degradation of the surface morphologies, formation of large pores and segregation of Cu elements. These morphological and microstructual differences could be one of the reasons for a reduction in J_c values of the YBCO films.

Original language	English
Pages (from-to)	954-958
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	426-431
Issue number	II
DOIs	https://doi.org/10.1016/j.physc.2005.02.150
Publication status	Published - 2005
Externally published	Yes
Event	Proceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity - Duration: Nov 23 2004 → Nov 25 2004

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2005.02.150

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@article{5bb0e963d9ea4a488be0aade3a2c1694,

title = "Fabrication of YBCO coated conductors using advanced TFA-MOD process",

abstract = "We have investigated the influence of the heating rate in the calcination process on the superconducting properties in order to optimize an advanced TFA-MOD process. The increase of the heating rate makes Jc values lower, and the maximum values of HF gas generation rate higher. From TEM observation of the precursor film, the large pores and segregation of Cu elements were observed in the films at high heating rates. Consequently, it is clear that the increase of the heating rate during calcination process caused abrupt HF gas generation leading to degradation of the surface morphologies, formation of large pores and segregation of Cu elements. These morphological and microstructual differences could be one of the reasons for a reduction in Jc values of the YBCO films.",

author = "K. Nakaoka and Y. Tokunaga and Matsuda, {J. S.} and H. Fuji and S. Koyama and R. Teranishi and T. Izumi and Y. Shiohara and T. Watanabe and Y. Yamada and T. Goto and A. Yoshinaka and A. Yajima",

note = "Funding Information: This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.; Proceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity ; Conference date: 23-11-2004 Through 25-11-2004",

year = "2005",

doi = "10.1016/j.physc.2005.02.150",

language = "English",

volume = "426-431",

pages = "954--958",

journal = "Physica C: Superconductivity and its applications",

issn = "0921-4534",

publisher = "Elsevier B.V.",

number = "II",

}

TY - JOUR

T1 - Fabrication of YBCO coated conductors using advanced TFA-MOD process

AU - Nakaoka, K.

AU - Tokunaga, Y.

AU - Matsuda, J. S.

AU - Fuji, H.

AU - Koyama, S.

AU - Teranishi, R.

AU - Izumi, T.

AU - Shiohara, Y.

AU - Watanabe, T.

AU - Yamada, Y.

AU - Goto, T.

AU - Yoshinaka, A.

AU - Yajima, A.

N1 - Funding Information: This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.

PY - 2005

Y1 - 2005

N2 - We have investigated the influence of the heating rate in the calcination process on the superconducting properties in order to optimize an advanced TFA-MOD process. The increase of the heating rate makes Jc values lower, and the maximum values of HF gas generation rate higher. From TEM observation of the precursor film, the large pores and segregation of Cu elements were observed in the films at high heating rates. Consequently, it is clear that the increase of the heating rate during calcination process caused abrupt HF gas generation leading to degradation of the surface morphologies, formation of large pores and segregation of Cu elements. These morphological and microstructual differences could be one of the reasons for a reduction in Jc values of the YBCO films.

AB - We have investigated the influence of the heating rate in the calcination process on the superconducting properties in order to optimize an advanced TFA-MOD process. The increase of the heating rate makes Jc values lower, and the maximum values of HF gas generation rate higher. From TEM observation of the precursor film, the large pores and segregation of Cu elements were observed in the films at high heating rates. Consequently, it is clear that the increase of the heating rate during calcination process caused abrupt HF gas generation leading to degradation of the surface morphologies, formation of large pores and segregation of Cu elements. These morphological and microstructual differences could be one of the reasons for a reduction in Jc values of the YBCO films.

UR - http://www.scopus.com/inward/record.url?scp=25644447542&partnerID=8YFLogxK

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U2 - 10.1016/j.physc.2005.02.150

DO - 10.1016/j.physc.2005.02.150

M3 - Conference article

AN - SCOPUS:25644447542

SN - 0921-4534

VL - 426-431

SP - 954

EP - 958

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - II

T2 - Proceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity

Y2 - 23 November 2004 through 25 November 2004

ER -

Fabrication of YBCO coated conductors using advanced TFA-MOD process

Abstract

All Science Journal Classification (ASJC) codes

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