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Title: Fabrication of wound capacitors using flexible alkali-free glass

Here, alkali-free glasses, which exhibit high energy storage densities (~35 J/cc), present a unique opportunity to couple high temperature stability with high breakdown strength, and thus provide an avenue for capacitor applications with stringent temperature and power requirements. Realizing the potential of these materials in kilovolt class capacitors with >1 J/cc recoverable energy density requires novel packaging strategies that incorporate these extremely fragile dielectrics. In this paper, we demonstrate the feasibility of fabricating wound capacitors using 50-μm-thick glass. Two capacitors were fabricated from 2.8-m-long ribbons of thin (50 μm) glass wound into 125-140-mm-diameter spools. The capacitors exhibit a capacitance of 70-75 nF with loss tangents below 1%. The wound capacitors can operate up to 1 kV and show excellent temperature stability to 150 °C. By improving the end terminations, the self-resonance can be shifted to above 1 MHz, indicating that these materials may be useful for pulsed power applications with microsecond discharge times.
ORCiD logo [1] ;  [1] ;  [2] ;  [2] ;  [1] ;  [3] ;  [2] ;  [1] ;  [1]
  1. The Pennsylvania State Univ., University Park, PA (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Nippon Electric Glass, Otsu (Japan)
Publication Date:
Report Number(s):
Journal ID: ISSN 2156-3950; 603221; TRN: US1700182
Grant/Contract Number:
Accepted Manuscript
Journal Name:
IEEE Transactions on Components, Packaging, and Manufacturing Technology
Additional Journal Information:
Journal Volume: 6; Journal Issue: 10; Journal ID: ISSN 2156-3950
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; power capacitors; capacitors; electronic components; glass; capacitance; wounds; spirals; electrodes; packaging
OSTI Identifier: