The formation of the equilibrium Cu (I) & harr; Cu (II) in colored optical glasses under the combined action of several factors. It is shown that the oxidation of copper increases with an increase in its total mass content, an increase in the content of carbonates in the charge, an increase in the basicity coefficient of the matrix and mainly depends on the ratio between the oxides of chromium, arsenic and copper. A coefficient for the quantitative assessment of the combined effect of chromium and arsenic oxides on the equilibrium of copper is proposed. Tab. 2, ill. 4, bibliography: 6 titles.
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