研究目的
Investigating the synthesis and characterization of Cr3+-doped alumina by the sol-gel non-hydrolytic methodology to obtain the ruby phase and its properties.
研究成果
The sol-gel non-hydrolytic route successfully produced Cr3+-doped alumina with the ruby phase emerging at 1100 oC. The material's properties were confirmed through various spectroscopic techniques, indicating the incorporation of chromium(III) ions into the alumina matrix and their occupation of a distorted octahedral symmetry site.
研究不足
The study is limited to the synthesis and characterization of Cr3+-doped alumina by the sol-gel non-hydrolytic methodology. The application of the synthesized material in practical devices is not explored.
1：Experimental Design and Method Selection:
The sol-gel non-hydrolytic methodology was employed for the synthesis of Cr3+-doped alumina. The methodology is based on the condensation between a metallic halide and a metallic alkoxide.
2：Sample Selection and Data Sources:
Aluminum chloride and chromium(III) chloride were used as precursors. The samples were treated at different temperatures (900 and 1100 oC).
3：List of Experimental Equipment and Materials:
Siemens D 5000 diffractometer, SPEX-fluorog fluorometer model F212I, Bruker Avance III 400WB HD spectrometer, Bruker ESP 300E spectrometer, CARY spectrophotometer (5000 UV-VIS-NIR).
4：Experimental Procedures and Operational Workflow:
The synthesis involved reflux of aluminum chloride and di-isopropyl ether in dry dichloromethane and absolute ethanol under argon atmosphere. The obtained gel was aged and then concentrated under vacuum. The powder was characterized after thermal treatment.
5：Data Analysis Methods:
XRD, PL, NMR, EPR, and diffuse reflectance UV-Vis spectroscopy were used for characterization.
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