Alkali-free glass as a high energy density dielectric material

Nicholas J. Smith, Badri Rangarajan, Michael T. Lanagan, Carlo G. Pantano

Research output: Contribution to journalArticle

90 Citations (Scopus)

Abstract

One of the greatest challenges in the development of new high energy density materials is to increase dielectric permittivity while maintaining high breakdown strength. The dielectric breakdown behavior of an alkali-free barium boroaluminosilicate glass is shown to have remarkably high DC dielectric breakdown strength (12 MV/cm) and reasonably high permittivity (~ 6), equating to energy densities in excess of 35 J/cm3. This behavior is attributed to highly polarizable Ba ions enhancing the real part of complex permittivity, the low loss due to the alkali-free composition, and the substantially defect-free quality of the glass and its surfaces. To our knowledge, this is the highest breakdown strength reported for a bulk glass, and rivals the breakdown strength more typically observed in pristine thin films of SiO2. These findings indicate that alkali-free multicomponent glasses may be strong candidates for next-generation high energy density storage capacitors for portable or pulsed power applications.

Original languageEnglish (US)
Pages (from-to)1245-1248
Number of pages4
JournalMaterials Letters
Volume63
Issue number15
DOIs
StatePublished - Jun 15 2009

Fingerprint

Alkalies
alkalies
Permittivity
flux density
breakdown
Electric breakdown
Glass
glass
Capacitor storage
permittivity
Barium
Ions
Thin films
Defects
barium
Chemical analysis
capacitors
direct current
defects
thin films

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Smith, Nicholas J. ; Rangarajan, Badri ; Lanagan, Michael T. ; Pantano, Carlo G. / Alkali-free glass as a high energy density dielectric material. In: Materials Letters. 2009 ; Vol. 63, No. 15. pp. 1245-1248.
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Alkali-free glass as a high energy density dielectric material. / Smith, Nicholas J.; Rangarajan, Badri; Lanagan, Michael T.; Pantano, Carlo G.

In: Materials Letters, Vol. 63, No. 15, 15.06.2009, p. 1245-1248.

Research output: Contribution to journalArticle

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AB - One of the greatest challenges in the development of new high energy density materials is to increase dielectric permittivity while maintaining high breakdown strength. The dielectric breakdown behavior of an alkali-free barium boroaluminosilicate glass is shown to have remarkably high DC dielectric breakdown strength (12 MV/cm) and reasonably high permittivity (~ 6), equating to energy densities in excess of 35 J/cm3. This behavior is attributed to highly polarizable Ba ions enhancing the real part of complex permittivity, the low loss due to the alkali-free composition, and the substantially defect-free quality of the glass and its surfaces. To our knowledge, this is the highest breakdown strength reported for a bulk glass, and rivals the breakdown strength more typically observed in pristine thin films of SiO2. These findings indicate that alkali-free multicomponent glasses may be strong candidates for next-generation high energy density storage capacitors for portable or pulsed power applications.

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