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Reliability assessment of mica high voltage capacitor through environmental test and accelerated life test

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2019, 29(6), pp.270-275
  • DOI : 10.6111/JKCGCT.2019.29.6.270
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : November 19, 2019
  • Accepted : December 12, 2019
  • Published : December 31, 2019

Seong Hwan park 1 Young Jae Ham 1 Jeong Seok kim 2 Kyounghun Kim 3 Seong Min So 3 Minseok Jeon 4

1(주)한화 구미사업장 개발1팀
2익스팬테크(주) 부설연구소
3한국세라믹기술원
4한국산업기술시험원

Accredited

ABSTRACT

Mica capacitor is being adopted for high voltage firing unit of guided weapon system because of its superiorimpact enduring property relative to ceramic capacitor. Reliability of localized mica high voltage capacitors was verifiedthrough environmental test like terminal strength test, humidity test, thermal shock test and accelerated life test forapplication to high voltage firing unit. Failure mode of mica capacitor is a decrease of insulation resistance and its finaldielectric breakdown. Main constants of accelerated life model were derived experimentally and voltage constant andactivation energy were 5.28 and 0.805 eV respectively. Lifetime of mica capacitor at normal use condition was calculatedto be 38.5 years by acceleration factor, 496, and lifetime at accelerated condition and this long lifetime confirmed thatmica high voltage capacitor could be applied for firing unit.

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