研究目的
To synthesize calcium aluminate-based luminophores by the citrate nitrate sol–gel process and study their properties for applications in construction materials, catalysts, optical emission sources, and display devices.
研究成果
The study successfully synthesized calcium aluminate-based luminophores using a microwave-assisted sol–gel process. Optimal luminescence was achieved at an annealing temperature of 1200°C and an activator concentration of 5 mol %. Higher concentrations led to luminescence quenching. The findings contribute to the development of materials for optical applications.
研究不足
The study focused on the synthesis and properties of calcium aluminate-based luminophores, with limitations including the specific conditions of microwave treatment and annealing temperatures. The luminescence quenching at higher activator concentrations was noted as a limitation.
1：Experimental Design and Method Selection:
The study employed a microwave-assisted sol–gel process for the synthesis of calcium aluminate and luminescent materials. The process involved the use of calcium nitrate tetrahydrate, aluminum nitrate nonahydrate, citric acid monohydrate, and europium(III) oxide as starting materials.
2：Sample Selection and Data Sources:
The samples were prepared by dissolving the starting compounds in distilled water, followed by microwave treatment and annealing.
3：List of Experimental Equipment and Materials:
Equipment included a Netzsch STA 449C simultaneous thermal analyzer, Agilent Cary 630 FTIR spectrometer, Rigaku MiniFlex 600 diffractometer, Hitachi TM-3000 scanning electron microscope, and Solar CМ2203 spectrofluorimeter.
4：Experimental Procedures and Operational Workflow:
The synthesis involved mixing the reactants, microwave treatment for gelation, and annealing to form crystalline products. The phase formation and properties were analyzed using various techniques.
5：Data Analysis Methods:
The data were analyzed using thermal analysis, IR spectroscopy, powder X-ray diffraction, scanning electron microscopy, and spectrofluorimetry.
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