DC-electro softening in soda lime silicate glass: an electro-thermal analysis

Research output: Contribution to journalArticle

Authors

  • Lorenzo Pinter
  • Mattia Biesuz
  • Vincenzo M. Sglavo
  • Theo Saunders
  • Mike Reece
  • Salvatore Grasso

External organisations

  • University of Trento
  • Queen Mary University of London
  • Southwest Jiaotong University

Abstract

DC-electric field-induced softening was investigated in soda lime glass. The application of a DC current causes a migration of Na ions towards the cathode resulting in the formation of a sodium depleted layer close to the anode where a localized voltage drop ignites electrical arcs through the glass. This effect is strongly asymmetric with respect to the applied DC polarity and, at the anode, it induces strong photoemission (optical transition of alkali elements) sharp rise in temperature and increased electrical resistance. It appears that electrolytic effects and sodium migration play a fundamental role as triggering mechanisms of DC-electric field-induced softening.

Details

Original languageEnglish
Pages (from-to)14-18
Number of pages5
JournalScripta Materialia
Volume151
Early online date30 Mar 2018
Publication statusPublished - 1 Jul 2018

Keywords

  • DC conductivity, Electric field-induced softening, Flash sintering, Soda lime silicate glass, Softening