Copper ⇌ Alkali Ion Exchange of Alkali Aluminosillcate Glasses in Copper-Containing Molten Salt: I, Monovalent Copper Salt, CuCl |
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Authors: | Toshinobu Yoko Toshio Nishiwaki Kanichi Kamiya Sumio Sakka |
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Affiliation: | Department of Industrial Chemistry, Faculty of Engineering, Mie University, Tsu, Mie-Ken 514, Japan |
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Abstract: | Cu+⇌ R+ (R = Li, Na, and K) ion exchange experiments were conducted for 20R2O·10Al2O3·70SiO2 glasses in molten CuCl at 550°C in air and nitrogen atmospheres. The depth profiles of the copper incorporated into glasses were determined with an electron microprobe X-ray analyzer. The total amount of diffusing copper, M t, strongly depended on the type of alkali ion in the glass and the ion-exchange atmosphere; i.e., M t increased with increasing cationic size in the order Li < Na < K and M t was greater in air than in nitrogen. The Cu ⇌ R+ ion exchange kinetics are discussed in detail. |
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Keywords: | ion exchange copper alkalis glass aluminosilicates |
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