Development of new types of crystal and coloured glasses

Research is focused on eliminating oxides of toxic elements, notably lead and barium from the glass. The composition of the proposed glass is optimized in terms of the required technological and utiliyation properties. Colors affected by the redox state of the glass can be predicted by laboratory experiments, especially electrochemical measurements in glass melts. In addition, the laboratory experiments and proposed models follow the color formation by other mechanisms, such as crystalization of in the glass melts (Au, Ag and Cu ruby).

The figure shows a TEM image of gold nano crystals in a gold ruby glass.

Patents

• Kloužek J., Polák M., Hřebíček M., Kaiser K., Tonarová V. (2012). Crystal non-lead and nonbaryum glass with content of lanthanum and niobium oxides. Patent No. CZ 303117. UPV
• Kloužek, L. Němec, J. Tesař, M. Hřebíček, K. Kaiser (2010). Ruby glass coloured by gold. Patent No. CZ 302143. UPV
• Kloužek, L. Němec, J. Tesař, M. Hřebíček, K. Kaiser (2010). Crystal glass without content of lead and baryum compound. Patent No. CZ 302142. UPV
• Kloužek, L. Němec, J. Tesař, M. Hřebíček, K. Kaiser (2010). Coloured glasses without content of lead and baryum compound. Patent No. CZ 302144. UPV
•  Němec L., Kloužek J., Hadrava S., Hřebíček M., Bicek Z. (2005). Lead- and barium-free crystal glass. Patent No. CZ 294797. UPV