用吸收光谱法研究了Ｒ２Ｏ—ＢａＯ—Ｐ２Ｏ５系统磷酸盐激光玻璃中铂颗粒密度与铭的氧化还原平衡的关系。结果表明，玻璃中铂颗粒密度随平衡向右移动而减小；玻璃中平衡随熔炼气氛中氧分压增大、熔炼温度升高而向右移动，当足够大时，铂颗粒不能形成。 The relationship between the density of platinum particles in R2O-BaO-P2O5 system phosphate laser glass and its redox balance was studied by absorption spectroscopy. The results show that the density of platinum particles in the glass decreases with the shift from equilibrium to the right. The balance of glass shifts to the right with the increase of partial pressure of oxygen in the smelting atmosphere and the melting temperature. When enough, the platinum particles can not form.