Fabrication of Wound Capacitors Using Flexible Alkali-Free Glass

Rudeger H.T. Wilke, Amanda Baker, Harlan Brown-Shaklee, Raegan Johnson-Wilke, Chad Hettler, Takashi Murata, Patrick O'Malley, Steve Perini, Michael Lanagan

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)1555-1560
Number of pages6
JournalIEEE Transactions on Components, Packaging and Manufacturing Technology
Volume6
Issue number10
DOIs
StatePublished - Oct 2016

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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