研究目的
Investigating the synthesis of monoclinic Y2O3 under high temperature high pressure conditions and its photoluminescence properties.
研究成果
The study successfully synthesized monoclinic Y2O3 from cubic Y2O3 under HTHP conditions (3 GPa and 900 ℃), demonstrating a feasible method for phase transformation. The photoluminescence property of monoclinic Y2O3: Eu3+ was confirmed, suggesting potential applications in luminescent materials. This method may be extended to other rare earth oxides.
研究不足
The study is limited by the high pressure and temperature conditions required for the synthesis of monoclinic Y2O3, which may not be easily scalable for mass production. Additionally, the effect of grain boundaries on properties was not fully explored.
1：Experimental Design and Method Selection:
The study involved the synthesis of cubic Y2O3 by calcining yttrium based coordination polymer (Y-CP) obtained via microwave-assisted method, followed by high temperature high pressure (HTHP) treatment to obtain monoclinic Y2O
2：Sample Selection and Data Sources:
Y-CP was synthesized from Y(NO3)3·6H2O and oxalic acid in DMF, then calcined to produce cubic Y2O
3：List of Experimental Equipment and Materials:
A large volume cubic multi-anvil high pressure apparatus was used for HTHP treatment.
4：Experimental Procedures and Operational Workflow:
The cubic Y2O3 was subjected to HTHP conditions (3 GPa and temperatures up to 1000 ℃) to study phase transformation.
5：Data Analysis Methods:
The products were characterized using SEM, XRD, and FT-IR spectra, and the photoluminescence property of Y2O3: Eu3+ was investigated.
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