Effects of doping B2O3 on the defects-state in SiO2-containing phosphate based glasses

The effects of doping B2O3 on the defects and their induced anti-radiation performance change of the multicomponent phosphate glasses were studied in this Work. The introduction of B2O3 reduces the connectivity of phosphate chains and thus increases the concentration of PO3-EC and PO4-EC defects in the phosphate glass network that have large absorption in the high-energy region. Meanwhile, B2O3 can improve the oxidizability of those glasses at the same melting temperature under which Fe ions Will be more easily oxidized to Fe ions. However the addition of B2O3 in terms of H3BO3 as it reaches up to 7.5 wt%, could enhance the gamma radiation resistance of the phosphate glasses, in this case B(2)O(3)3, and enter the phosphate glass network in the form of B5O8 units. The units enhanced the connectivity of the long phosphate chains and thus reduced the concentration of PO3-EC and PO4-EC defects in phosphate glasses. (C) 2017 Optical Society of America