Zum Ionenaustausch in porösen Gläsern

Ionexchange on Porous Glasses Porous alkali-boron-silicate glasses show the following sequence of coefficients of the ionexchange-selectivity: The degree of ionexchange for divalent ions is only very little. The ionexchange capacity is influenced by the degree of phase-separation of the original glasses and has the origin in BOH groups. The energies of activation for the ionexchange reactions are 10.6–11.8 kcal/mol.     

Zum Ionenaustausch an porösen Gläsern unterschiedlicher Struktur und Textur

Investigation of Phase Equilibria in the Systems CuO? SeO₂? H₂O and Ag₂O? SeO₂? H₂O at 100°C Phase equilibria in the systems CuO? SeO₂? H₂O and Ag₂O? SeO₂? H₂O at 100°C are studied. Crystallization fields and conditions for formation of CuSeO₃ · 2 H₂O, CuSeO₃ · H₂SeO₃, and Ag₂SeO₃ are determined. The thermic dissoziation and the X-ray-patterns of the compounds CuSeO₃ · H₂SeO₃ and CuSeO₃ · SeO₂ obtained for the first time are given.     

Chalkogenidgläser mit organischen Komponenten. II. Über Gläser der Zusammensetzung Selen-Arsen-Jod-Biphenylen

Chalcogenide Glasses with Organic Components, II. Glasses of the Selenium-Arsenic-Iodine-Biphenylene System New solids were prepared by melting suitable glasses of the system Se? As? I and of 4,4′-Bis(diiodoarsa)biphenyle, and cooling them subsequently. The transformation temperatures, densities, dc-conductivities, and i.r. spectra of the solids are reported. These solids exhibit chain-like structures. The biphenylene groups are connected with the inorganic matrix by arsenic-carbon bonds. The structure especially of the biphenylene units as wall as the conductivity behaviour is discussed.     

Bestimmung von Acidit?t in der Schmelze von Emailgl?sern mit der Sauerstoffelektrode

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