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

Lorenzo Pinter, Mattia Biesuz*, Vincenzo M. Sglavo, Theo Saunders, Jon Binner, Mike Reece, Salvatore Grasso

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


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.

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


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

ASJC Scopus subject areas

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


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