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Effects of artificial holes in very large single-grain Y1.5Ba2Cu3O7-y bulk superconductors

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  • 발행기관
    한국초전도저온학회 (구 한국초전도저온공학회) 바로가기
  • 간행물
    한국초전도·저온논문지 (구 한국초전도저온공학회논문지) KCI 등재 SCOPUS 바로가기
  • 통권
    Vol.19 No.3 (2017.09)바로가기
  • 페이지
    pp.27-32
  • 저자
    S.-D. Park, H.-W. Park, B.-H. Jun, C-J. Kim
  • 언어
    영어(ENG)
  • URL
    https://www.earticle.net/Article/A311127

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초록

영어
The effects of artificial holes on the trapped magnetic fields and magnetic levitation forces of very large single- grain Y1.5Ba2Cu3O7-y (Y1.5) bulk superconductors were studied. Artificial holes were made for Y1.5 powder compacts by die pressing using cylindrical dies with a diameter of 30 mm or 40 m, or rectangular dies with a side length of 50 mm. The single grain Y1.5 bulk superconductors (25 mm, 33 mm in diameter and 42 mm in side length) with artificial holes were fabricated using a top-seeded melt growth (TSMG) process for the die-pressed Y1.5 powder compacts. The magnetic levitation forces at 77 K of the 25 mm single grain Y1.5 samples with one (diameters of 4.2 mm) or six artificial holes (diameters of 2.5 mm) were 10−17% higher than that of the Y1.5 sample without artificial holes. The trapped magnetic fields at 77 K of the Y1.5 samples with artificial holes were also 9.6-18% higher than that of the Y1.5 sample without artificial holes. The 33 mm and 42 mm single grain Y1.5 samples with artificial holes (2.5 mm and 4.2 mm in diameter) also showed trapped magnetic fields 10−13% higher than that of the Y1.5 samples without artificial holes in spite of the reduced superconducting volume fraction due to the presence of artificial holes. The property enhancement in the large single grain Y1.5 bulk superconductors appears to be attributed to the formation of the pore-free regions near the artificial holes and the homogeneous oxygen distribution in the large Y123 grains.

목차

Abstract
 1. INTRODUCTION
 2. EXPERIMENTAL PROCEDURE
 3. RESULTS AND DISCUSSION
 4. CONCLUSIONS
 ACKNOWLEDGMENTS
 REFERENCES

키워드

large single grain Y1.5Ba2Cu3O7-y superconductors artificial holes die pressing trapped magnetic fields magnetic levitation forces

저자

  • S.-D. Park [ Korea Atomic Energy Research Institute, Daejeon, Korea ]
  • H.-W. Park [ Korea University of Technology and Education, Cheon-an, Korea ]
  • B.-H. Jun [ Korea Atomic Energy Research Institute, Daejeon, Korea ]
  • C-J. Kim [ Korea Atomic Energy Research Institute, Daejeon, Korea ] Corresponding author

참고문헌

자료제공 : 네이버학술정보

간행물 정보

발행기관

  • 발행기관명
    한국초전도저온학회 (구 한국초전도저온공학회) [The Korean Society of Superconductivity and Cryogenics (KSSC)]
  • 설립연도
    1998
  • 분야
    공학>전기공학
  • 소개
    21세기 핵심기술인 초전도공학과 저온공학분야의 기술 수준을 향상시키고, 선진 외국의 관련 학회와의 국제 교류 뿐만 아니라 이 분야에서 산.학.연의 학술활동 및 기술교류의 구심점으로의 그 역할을 성실히 수행하고자 한다.

간행물

  • 간행물명
    한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]
  • 간기
    계간
  • pISSN
    1229-3008
  • eISSN
    2287-6251
  • 수록기간
    1999~2026
  • 등재여부
    KCI 등재,SCOPUS
  • 십진분류
    KDC 427 DDC 537

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