Redox Equilibria of Multivalent Ions in Silicate Glasses
Identifieur interne : 001A42 ( Main/Exploration ); précédent : 001A41; suivant : 001A43Redox Equilibria of Multivalent Ions in Silicate Glasses
Auteurs : Howard V. Lauer Jr. [États-Unis] ; Richard V. Morris [États-Unis]Source :
- Journal of the American Ceramic Society [ 0002-7820 ] ; 1977-09.
Abstract
Experimental studies were made on the compositional dependence of the redox equilibrium of Eu in synthetic silicate liquids, together with an empirical model describing the observed compositional dependence. Electron paramagnetic resonance (EPR) was used to measure the concentration ratio of Eu2+ to Eu3+ in various glasses formed by rapidly quenching silicate liquids. The compositional field studied comprised mixtures of SiO2, TiO2, Al2O3, CaO, MgO, and Na2O. The proposed model describes the Eu2+/Eu3+ ratio over the entire compositional field in terms of parameters easily related to each glass composition. The general applicability and utility of the model is further demonstrated by its application to the Fe2+‐Fe3+, Ce3+‐Ce4+, and Cr3+‐Cr6+ redox reactions in binary alkali oxide silicate glasses of Li, Na, and K.
Url:
DOI: 10.1111/j.1151-2916.1977.tb15530.x
Affiliations:
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