Preparation and properties of lead halide phosphate glasses

Abstract The glass-forming regions in the PbCl 2 –PbBr 2 –P 2 O 5 and PbF 2 –PbBr 2 –P 2 O 5 systems were explored and glasses were prepared and properties measured. Based on these glass-forming systems, the exploration for glass-forming regions was extended to multi-component systems containing amounts of PbO⩽15 mol% and/or PbF 2 ⩽5 mol% in the PbCl 2 –PbBr 2 –P 2 O 5 based systems. We show that the glass-forming regions in the ternary systems extended to 30 mol% P 2 O 5 . The dissolution rate of the samples in water is in the order of 10 −5 mm/day. These samples have densities in the range 4.5–5.81 g/cm 3 and have glass transition temperatures in the range 146–281°C. The composition of the melted glasses differs from the batch composition, which is caused by the loss of some components during melting.