研究目的
To investigate the structural, optical, and magnetic properties of lead tellurite glass ceramics doped with europium(III) ions and co-doped with metallic copper nanoparticles or copper(II) ions, and to understand the influence of dopant level and co-dopant nature on these properties.
研究成果
The study successfully characterized the structural, optical, and magnetic properties of lead tellurite glass ceramics doped with europium and co-doped with copper. It was found that co-doping with CuNPs enhances the luminescence of europium ions, and that europium ions exist in both 3+ and 2+ valence states with a tendency to cluster.
研究不足
The study is limited by the techniques used, which may not fully capture all aspects of the samples' properties. The melting process may also introduce variability in the oxidation states of copper.
1：Experimental Design and Method Selection:
The study used the melt quenching method to prepare samples. Various spectroscopic techniques were employed to characterize the samples.
2：Sample Selection and Data Sources:
Samples were prepared with varying europium oxide contents and fixed amounts of CuNPs or CuO.
3：List of Experimental Equipment and Materials:
High purity chemicals from Alfa Aesar were used. Equipment included a Shimadzu 6000 XRD diffractometer, PerkinElmer Lambda 45 UV VIS spectrometer, Jasco FP 6200 spectro-fluorimeter, ADANI EPR CMS 8400 spectrometer, and a Faraday type magnetic balance.
4：Experimental Procedures and Operational Workflow:
Samples were melted at 900 °C for 15 min, then cooled at room temperature. Density measurements were performed using Archimedes' law.
5：Data Analysis Methods:
XRD data were analyzed to determine crystallite size using the Scherrer relationship. UV-VIS, EPR, and luminescence data were analyzed to understand optical and magnetic properties.
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