Instituto de Cerámica y Vidrio

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Nanocrystallisation of the cubic and hexagonal polymorphs of KLaF4 in a 70SiO2–7Al2O3–16K2O–7LaF3 (mol%) glass has been achieved by heat treatment above the glass transition temperature. For treatment at 580 °C, only the cubic structure crystallises, with a maximum crystallite size of ~9 nm. At higher temperatures, crystallisation of the hexagonal structure also takes place. The crystallisation process has been analysed using several thermal and structural techniques and is revealed to occur from a constant number of nuclei.

El Instituto de Cerámica y Vidrio a través del grupo GlaSS participa en este proyecto aportando la tecnología desarrollada en el proyecto europeo MULTIPROTECT.

Este recubrimiento tiene una eficacia frente a la corrosión comparable a la de los cromatos tóxicos y se ajusta a los estrictos requisitos del sector de la aeronáutica. Este producto presenta un precio ligeramente superior al de los recubrimientos actuales, pero se compensa con su menor impacto medioambiental.

Fluorine species adsorbed on the surface of TiO2 anatase nanoparticles improve their photocatalytic performance by reducing the recombination rate of photogenerated electrons and holes. Trifluoroacetic acid (TFAA) has been recently proposed as a promising harmless substitute for hydrofluoric acid (HF) in preparing fluorine-modified anatase with good scavenger properties.




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