Fabrication of Sn-doped zinc phosphate glass using a platinum crucible

The authors investigate the structural change of a ZnO–P₂O₅ sintered matrix for the preparation of SnO-doped zinc phosphate (SZP) glass using a platinum crucible. Heat treatment of zinc oxide and ammonium phosphate at 800 °C causes the formation of a Zn₂P₂O₇-like species, which is effective in preventing damage to the platinum crucible. Although the thermal property of the glass was affected by added Al₂O₃, Al₂O₃ hardly affects the quantum efficiency of the SZP glass phosphor. This process is important for the fabrication of contamination-free phosphate glass using ammonium phosphate as a starting material.