Insulation for Wind and React High Temperature Superconducting Coils

  • I. H. Mutlu
  • Y. S. Hascicek
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 44)


A thin, thermally stable, well-adhered insulation is needed for the fabrication of High Temperature Superconducting (HTS) coils. Due to the brittle nature of HTS materials the Wind and React (W & R) approach is employed. Therefore one has to use high temperature compatible insulating material for providing the turn to turn electrical insulation in the W&R HTS coils. A sol-gel ceramic based insulation coating process has been developed at the National High Magnetic Field Laboratory (NHMFL) for providing such insulation. Optical microscopy, Environmental Scanning Electron Microscopy (ESEM), and X-Ray Diffraction (XRD) were used to study the microstructure and phase composition of insulation coatings obtained. A stack of six double pancakes which was fabricated using this sol-gel insulation coating for turn-to-turn electrical insulation produced 1.2 T in a background field of 17.5 T at 4.2K.


High Temperaturc Superconductor Environmental Scan Electron Microscopy Electrical Insulation Insulation Coating Zirconia Coating 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    D. W. Hazelton, J. A. Rice, Y. S. Hascicek, I1. W. Weijers, and S. W. Van Sciver, Development and test of a BSCCO-2223 ZITS high field insert magnet for NMR, IEEE Trans. Appl. Supercord., 5 (2), 234, (1995).CrossRefGoogle Scholar
  2. 2.
    M. I. Godfrey, I. Belenli, Y. S. Hascicek, High temperature cryo-insulation for I ITS coils, NHMFL Annual Report (1995), p. 140.Google Scholar
  3. 3.
    K. Izumi, M. Muraktuni, T. Deguchi and A. Morita, Zirconia coating on stainless steel sheets from organozirconium compounds, J. Am. Creamics. Soc., 72, 8, 1465, (1989).CrossRefGoogle Scholar
  4. 4.
    Z. Feng, W. S. Postula, A. Akgerman, and R. G. Anthony, Characterization of Zirconia-based catalysts prepared by precipitation, calcination, and modified sol-gel methods, Ind. Eng. Chem. Res., 34, 78, (1995).CrossRefGoogle Scholar
  5. 5.
    A. R. Conde, M. Puerta, B. Ruiz and J. 1. Olivares, Thick aluminosilicate coatings on carbon steel via sol-gel, J. of Non-Crystal. Solid, 147, 467, (1992).ADSCrossRefGoogle Scholar
  6. 6.
    De Sanctis, L. Gomez and N. Pellegri, C. Parodi, A. Marajofsky, Protective glass coating on metallic substrates, J. of Non-Crystal. Solid, 121, 338, (1990).Google Scholar
  7. 7.
    M. Andrianainarivelo, R. J. Cornu, D. Leclercq, P. H. Mutin and A. Vioux, Non-hydrolytic sol-gel process zirconium titanante gels, J. Mater. Chem., 7, 2, 279, (1997).Google Scholar
  8. 8.
    Y. Haga, H. An, R. Yosomiya, Photoconductive properties of TiOZ films prepared by the sol-gel method and its applications, J. Mater. Sci., 32, 3183, (1997).ADSCrossRefGoogle Scholar
  9. 9.
    L. Cowey, K. Timms, I. McDougall, K. Marken, W. Dai, S. Hong, Design, fabrication and test of prototype high Tc magnets from BiSCCO 2212 powder in tube wire and dip coated tape, Cryog., 34, 813, (1994).ADSCrossRefGoogle Scholar
  10. 10.
    A. D. Nikulin, A. K. Shikov, E. V. Antipova, N. E. Khlebova, I. A. Erokhina, I I Akimov, Ultrathin ceramic insulation for Ag-sheathed high T, superconductors, IEEE Trans., Appl., Supercond., 61, 1842, (1995).Google Scholar
  11. 11.
    H. Dislich, in “ Sol-gel technology for thin films, fibers, preforms, electronics, and specialty shape”, edited by L. C. Kleein ( Noyes, Park Ridge), NJ, (1988) pp. 55.Google Scholar
  12. 12.
    H. Mitsui, Electrical insulation technology for superconducting magnets in Japan, IEEE Electrical Insulation Magazine, 10, 4, 23, (1994).CrossRefGoogle Scholar
  13. 13.
    I. H. Mutlu and Y. S. Hascicek, High temperature compatible insulation for high temperature superconducting (HTS) or low temperature superconducting (LTS) conductors, US patent application pending.Google Scholar
  14. 14.
    I. H. Mutlu, R. E. Goddard and Y. S. Hascicek, ESEM hot stage evaluation of sol-gel insulation coatings for high field HTS magnets, Microscopy and Microanalysis, Cleveland Ohio, (accepted ) (1997).Google Scholar
  15. 15.
    H. W. Weijers, D. Hazelton, L. Cowey, Y. S. Hascicek, I. H. Mutlu, U. P. Trociewitz and S. W. Van Sciver, Bi-2212 coils for 1 T class insert coils, accepted for publication in the proceedings CEC/ICMC 1997.Google Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • I. H. Mutlu
    • 1
  • Y. S. Hascicek
    • 1
  1. 1.National High Magnetic Field LaboratoryFlorida State UniversityTallahasseeUSA

Personalised recommendations