Preparation of long-lasting phosphorescence (LLP) glass-ceramic materials

Three kinds of glass-ceramics, i.e., Mn2+ doped zinc borosilicate, Eu2+, Dy3+ co-doped strontium aluminoborate and Eu2+, Nd3+ co-doped calcium aluminoborate were prepared, whose phosphorescence emission band peaks at 525, 516 and 464 nm, respectively. In preparation of these glass-ceramics the base glasses were gained by heating the Mixed starting materials at high temperature to get the transparent glasses; then those glasses were heat-treated and turned to opaque glass-ceramics. X-ray diffraction (XRD) shows that the crystallites are ZnSiO4, SrAl2O4 and alpha-CaAl2B2O7, respectively. It is a useful way to get new LLP materials by the method reported in this work that may be considered as "from glass to crystal"