研究掺入少量的碱金属离子Na~＋、K~＋后,50SiO_2-30PbO-20PbF_2-0.8ErF_3玻璃及玻璃陶瓷的热稳定性质和光谱性质。应用Judd-OfeIt理论和吸收光谱计算了Er~（3＋）离子的J-0参数Ω_λ（λ=2、4、6）。上转换光谱分析表明：在520、545和650 nm处有较强的绿光和红光发射,在412 nm处有微弱的紫光发射,分别对应~2H_（11/2）→~4I_（15/2）,~4S_（3/2）→~4I_（15/2）,~4F_（9/2）→~4I_（15/2）,~2H_（9/2）→~4I_（15/2）的跃迁。碱金属离子K~＋、Na~＋的加入均有利于掺Er~（3＋）硅酸盐玻璃和玻璃陶瓷的上转换发光增强,添加Na~＋的样品尤其明显。XRD、吸收光谱以及上转换荧光光谱结果表明,掺入Na~＋离子后,在50SiO_2-30PbO-20PbF_2-0.8ErF_3-0.5NaF中有部分Er~（3＋）：β-PbF_2微晶。
The upconversion spectroscopic properties of Na~＋（K~＋）/Er codoped 50SiO_2-30PbO- 20PbF_2-0.80ErF_3 glasses and glass ceramics were studied.Three major glasses were prepared by sintering method according to the following molar composition：50SiO_2-30PbO-20PbF_2-0.8ErF_3（EG）, 50SiO_2-30PbO-20PbF_2-0.5KO_（1/2）-0.8ErF_3（KG）,50SiO_2-30PbO-20PbF_2-0.5NaF-0.8ErF_3（NaG）.Er（3＋）：β-PbF_2 nano-crystallites grew in whole glasses,after heating treatment at the temperature 30℃higher than T_g.However,there existed small amount of Er~（3＋）：β-PbF_2 nano-crystallite in the NaG even before heating treatment.J-O parameters,Ω_2,Ω_4,Ω_6,were calculated from absorption spectrum according to J-O theory.The glass ceramics emitted more intensive red,green and blue upconersion luminescence than that of the glasses under exitation of 980 nm laser diode.
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