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Author McLaren, C. ♦ Heffner, W. ♦ Jain, H. ♦ Tessarollo, R. ♦ Raj, R.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ BREAKDOWN ♦ COMPARATIVE EVALUATIONS ♦ ELECTRIC FIELDS ♦ ELECTROLYSIS ♦ GLASS ♦ IONS ♦ JOULE HEATING ♦ LITHIUM ♦ SINTERING ♦ SODIUM SILICATES ♦ VISCOSITY ♦ VISCOUS FLOW
Abstract Motivated by the advantages of two-electrode flash sintering over normal sintering, we have investigated the effect of an external electric field on the viscosity of glass. The results show remarkable electric field-induced softening (EFIS), as application of DC field significantly lowers the softening temperature of glass. To establish the origin of EFIS, the effect is compared for single vs. mixed-alkali silicate glasses with fixed mole percentage of the alkali ions such that the mobility of alkali ions is greatly reduced while the basic network structure does not change much. The sodium silicate and lithium-sodium mixed alkali silicate glasses were tested mechanically in situ under compression in external electric field ranging from 0 to 250 V/cm in specially designed equipment. A comparison of data for different compositions indicates a complex mechanical response, which is observed as field-induced viscous flow due to a combination of Joule heating, electrolysis and dielectric breakdown.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-11-02
Publisher Place United States
Journal Applied Physics Letters
Volume Number 107
Issue Number 18


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