Production of inorganic phosphorecent pigments and their usage in glass and glaze systems

Phosphorescent pigments emit the absorbed light of a specific wavelength, when the light source is removed. It has been known for rather a long time that ZnS:Cu may emit green light, however, the glow it offers in applications where it is used and the continuity of such glow is limited (only a few hours). To eliminate this disadvantage, pigments with blue, green, bluish-green and yellowish-green radiation have been developed in the strontium aluminate system. Phosphorescence is derived in the dark when produced materials are held in sunlight or under ultraviolet light typically at 365-520 nm wavelength range.In this study, bluish-green and yellowish-green pigments were produced with phosphorescence property absorbing light of a specific wavelength (visible range) and emitting it in the dark with long glow time; afterwards it was sought to derive decorative or functional new ceramic products by using them in 3rd firing (decor firing) wall tile vetrosa and glaze applications and industrial tests were performed. Also they used in hot and cold artistic glass applications.