XPS measurements of the Fe-Pb-Si based glass

Glass samples with nominal compositions of xFe2O3-(50-x)PbO–50SiO2, where x = 12.5, 15, 17.5 (mol%) were prepared. Analytical grade substrates were used: Fe2O3, SiO2, and PbO. The appropriate amounts of reagents were mixed in an agate mortar. The powders obtained were melted in porcelain un-enamelled crucibles in an electric furnace at a temperature of 1623 K for 1–2 h. The various content of Fe was studied by XPS method. On the basis of XPS measurements, valence of Fe, Pb and Si elements was measurements. Investigations shoved a mixed state of Fe atoms.

制备了标称组分为xFe₂O₃-(50-x)PbO–50SiO₂（x取值为12.5、15、17.5，单位为摩尔百分比）的玻璃样品。实验采用分析纯级别的原料：三氧化二铁（Fe₂O₃）、二氧化硅（SiO₂）与一氧化铅（PbO）。将对应称量的试剂在玛瑙研钵中混合均匀。所得混合粉末置于无釉瓷坩埚内，于1623K的电炉中熔融1~2小时。采用X射线光电子能谱（X-ray Photoelectron Spectroscopy, XPS）法对不同铁含量的样品进行表征分析。基于XPS测试结果，对铁、铅、硅三种元素的价态进行了测定。研究表明铁原子呈现混合价态。