Free volume model for transport in fused salts: Electrical conductance in glass-forming nitrate melts

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

A free volume model for transport in fused salts has been tested by electrical conductance measurements on Ca(NO3)2 + KNO3 melts. Low temperature results exhibit rapidly changing activation energies and fit precisely an equation of the predicted form Λ = AT-1/2 exp(-k/(T - T0)). The constant T0 agrees with the measured glass transition temperature and represents the temperature for zero free volume in the liquid. T0 is shown to have a characteristic value for all molten salts, which depends on the electrostatic field strength of the constituent ions. Changes of T0 with composition are the main source of the composition dependence of conductance in the present system. Experimental values of k for molten salts indicate a predisposition of holes in the liquid to be of ionic size. The model offers an explanation of the glass-forming ability of molten ZnCl2.

Original languageEnglish (US)
Pages (from-to)1917-1929
Number of pages13
JournalJournal of Physical Chemistry
Volume68
Issue number7
StatePublished - 1964
Externally publishedYes

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Fused salts
molten salts
Free volume
Nitrates
nitrates
Molten materials
salts
Glass
glass
liquids
Salts
glass transition temperature
field strength
Liquids
activation energy
Chemical analysis
electric fields
Activation energy
Electric fields
Ions

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Free volume model for transport in fused salts : Electrical conductance in glass-forming nitrate melts. / Angell, Charles.

In: Journal of Physical Chemistry, Vol. 68, No. 7, 1964, p. 1917-1929.

Research output: Contribution to journalArticle

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