氧化钆对铁磷酸盐玻璃结构的影响

摘要

The glass samples with composition xGd2O3-(100-x)(40Fe2O3-60P2O5) (0 ≤ x ≤ l2mol%) have been prepared by the conventional melt quench method. The structure of the studied glasses have been investigated using X-ray diffraction (XRD), Scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR) and Raman spectra. The compositions containing up to 4mol% of Gd2O3 formed glasses. Density and hardness of the studied glasses increase with addition Gd2O3 content. FTIR and Raman data suggest that the addition 4mol% Gd2O3 in the 40Fe2O3-60P2O5 (mol%) glass does not produce any fundamental change in structure of the phosphate network, which consists of predominantly pyrophosphate groups with a small proportion of metaphosphate and orthophosphate groups. From all these considerations we can conclude that Gd2O3 enters in the structure of studied glasses as a network modifier.%为探究Gd2O3含量对40Fe2O3-60P2O5(mol％)基础玻璃结构的影响,采用传统熔融-冷却法制备xGd2O3-(100-x)(40Fe2O3-60P2O5)(0≤x≤12mol％)系列玻璃.利用XRD 、SEM、FTIR和Raman等手段对玻璃结构进行表征,并测试了玻璃密度和维氏硬度.结果表明,在Gd2O3含量小于等于4mol％时,易形成均质玻璃,在此范围内,玻璃密度和硬度都随Gd2O3含量的增加而增加,玻璃结构以焦磷酸盐结构为主,并伴随少量的正磷酸盐和偏磷酸盐结构.在磷酸盐玻璃结构中,Gd3+作为网络修饰离子,位于玻璃网络结构间隙.