研究目的
To understand how different combinations of vacuum sintering temperatures and HIP treatments influence the microstructure, optical, and lasing properties of Yb:Sc2O3 transparent ceramics.
研究成果
The vacuum pre-sintering temperature was found to be the main determinant of sample quality and laser performance. The best laser performance was achieved with the sample pre-sintered at 1650 °C and HIP treated at 1800 °C, showing a slope efficiency of 50% and an output power of 6.62 W.
研究不足
The study was limited to specific combinations of vacuum sintering temperatures and HIP treatments. The effects of other parameters or methods were not explored.
1：Experimental Design and Method Selection:
The study involved preparing transparent 3at.% Yb:Sc2O3 ceramics by reactive sintering of commercially available powders under vacuum followed by HIP. Different combinations of vacuum sintering temperatures (1650 °C and 1750 °C) and HIP treatments (1700 °C and 1800 °C at 200 MPa) were tested.
2：Sample Selection and Data Sources:
Commercial oxide powders of Sc2O3 and Yb2O3 were used. The powders were mixed, milled, dried, pressed into pellets, and then subjected to vacuum sintering and HIP treatments.
3：List of Experimental Equipment and Materials:
Equipment included a rotary evaporator, SEM for microstructure analysis, a spectrophotometer for transmission spectra, and a spectrofluorometer for luminescence spectra. Materials included Sc2O3 and Yb2O3 powders.
4：Experimental Procedures and Operational Workflow:
The process involved powder mixing, milling, drying, pressing, vacuum sintering, HIP treatment, and optical polishing. Laser performance was tested using a V-shaped laser cavity.
5：Data Analysis Methods:
The density of sintered samples was measured using the Archimedes' principle. Microstructure was analyzed by SEM. Transmission and luminescence spectra were measured, and laser output power was measured at different levels of injected pump.
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