Pisarski Wojciech A, Goryczka Tomasz, Pisarska Joanna, Ryba-Romanowski Witold
Institute of Materials Science, University of Silesia, Katowice, Poland.
J Phys Chem B. 2007 Mar 15;111(10):2427-30. doi: 10.1021/jp070142g. Epub 2007 Feb 16.
Lead borate based glasses have been analyzed using Raman and infrared spectroscopy. The formation of different borate groups and the direction of BO3 <--> BO4 conversion strongly depends on the PbO- and/or PbF2-to-B2O3 ratio in chemical composition. PbF2-PbO-B2O3 based glasses containing Er3+ ions have been studied after annealing. The orthorhombic PbF2 crystallites are formed during thermal treatment, which was evidenced by X-ray diffraction analysis. Near-infrared luminescence at 1530 nm and green up-conversion at 545 nm have been registered for samples before and after annealing. The luminescence bands correspond to 4I13/2-4I15/2 and 4S3/2-4I15/2 transitions of Er3+ ions, respectively. In comparison to the precursor glasses, the luminescence intensities are higher in the studied transparent oxyfluoride glass ceramics. Simultaneously, the half-width of the luminescence lines slightly decreases. It can be the evidence that a small amount of the Er3+ ions is incorporated into the orthorhombic PbF2 phase.
已使用拉曼光谱和红外光谱对硼酸铅基玻璃进行了分析。不同硼酸盐基团的形成以及BO3⇌BO4转化的方向在很大程度上取决于化学成分中PbO和/或PbF2与B2O3的比例。对含有Er3+离子的PbF2-PbO-B2O3基玻璃进行了退火处理后的研究。通过X射线衍射分析证明，在热处理过程中形成了正交晶系的PbF2微晶。对退火前后的样品记录了1530nm处的近红外发光和545nm处的绿色上转换发光。发光带分别对应于Er3+离子的4I13/2-4I15/2和4S3/2-4I15/2跃迁。与前驱体玻璃相比，所研究的透明氧氟化物玻璃陶瓷中的发光强度更高。同时，发光线的半高宽略有减小。这可能表明少量的Er3+离子掺入了正交晶系的PbF2相中。
