Vitrification, crystallization behavior and structure of zinc aluminosilicate glasses

The glass formation, crystallization behavior and structure were investigated in the ZnO-Al2O3-SiO2 system. boundaries of forming region are defined, indicating absence glasses along ZnO-SiO2 binary role Al to improve formation. has been clarified for representative compositions showing first willemite near a metastable zinc aluminosilicate solid solution higher Al2O3/SiO2 content. Gahnite appears as second phase is mainly present center tectosilicate join. Glass was studied using 27Al NMR spectroscopy, neutron X-ray diffraction molecular dynamics simulation. Both Zn shown be distributed between four-fold five-fold sites. proportion [4]Al more important ZnAl2O4-SiO2 A remarkable similar revealed ability structural properties MgO ZnO systems.