研究目的
Investigating the crystal growth process of octahedron-like Ce0.95(Yb or Lu)0.05O1.975 ceria-based mixed oxides and the role of oriented attachment mechanism in this process.
研究成果
The study concludes that the non-classical crystallization mechanism, oriented attachment, plays a dominant role in the crystal growth of octahedron-like Ce0.95(Yb or Lu)0.05O1.975 mixed oxides. The presence of a thin film of LnPO4*xH2O on the surface of mixed oxide crystals acts as a 'glue' facilitating the oriented attachment process.
研究不足
The study is limited to the specific conditions of hydrothermal synthesis and the analysis of crystal growth mechanisms in ceria-based mixed oxides. The applicability of findings to other systems or synthesis methods may require further investigation.
1：Experimental Design and Method Selection:
The study involved hydrothermal synthesis of Ce
2：95(Yb or Lu)05O975 mixed oxides under controlled conditions to investigate the crystal growth mechanism. Sample Selection and Data Sources:
Samples were prepared with varying synthesis times and analyzed using TEM, HRTEM, XRD, EDX, and FTIR techniques.
3：List of Experimental Equipment and Materials:
Hydrothermal autoclave for synthesis, TEM, HRTEM, XRD, EDX, and FTIR for characterization.
4：Experimental Procedures and Operational Workflow:
Synthesis was carried out at 180 °C for times ranging from 2 to 72 hours, followed by characterization to study crystal growth.
5：Data Analysis Methods:
Crystal and particle sizes were calculated from XRD and TEM data, respectively, to compare growth mechanisms.
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