【摘要】 制备了分别含有MgF2,CaF2,SrF2或BaF2的Er3+/Tm3+/Yb3+共掺氟氧锗酸盐玻璃试样和包含BaF2纳米晶的玻璃陶瓷试样,所制备试样均具有良好的透光性。对试样的热稳定性和上转换发光特性进行了研究。通过分析试样的吸收光谱发现,随着所含二价阳离子原子量的增大,试样的紫外吸收截止波长明显向短波方向移动。结果显示:通过改变所含二价碱土金属离子的种类能够对激发光的颜色进行调节,特别值得关注的是Mg2+的影响;结果证实:通过对包含二价碱土金属的玻璃进行微晶化处理或者增加二价碱土金属的含量均能提高上转换发光的强度。更多还原

【Abstract】 Transparent Er3+/Tm3+/Yb3+ co-doped oxyfluorogermanate glasse s alone containing MgF2,CaF2,SrF2 or BaF2 and nano-glass-ceramics on ly containing BaF2 were prepared.The thermal stabilities and the up-co nversion emission properties of the samples were investigated.Analyses of abso rbance spectra reveal that the UV cutoff band moves slightly to shortwave band w ith the doping bivalent cation mass increasing.The results show that the emissi on color can be adjusted by changing the alkaline earth cation species in the gl ass matrixes,especially as Mg2+ is concerned,and the emission intensity can increase notably by heating the glass containing alkaline-earth fluoride i nto glass ceramic containing alkaline-earth fluoride nanocrystals or increasing the content of bivalent alkaline earth fluorides.更多还原