研究目的
To understand the nanocrystallization processes of La3+-based oxyfluoride aluminosilicate glasses upon heating and to demonstrate their application as emitting media in display.
研究成果
The study demonstrates the feasibility of controllable competitive nanocrystallization of pure La3+-based fluorides from aluminosilicate glasses via modifying Al/Si ratio. The developed glass ceramics are ideal hosts for lanthanide dopants, enabling them to act as emissive media in incoherent 940 nm LED excitable UC device.
研究不足
The study focuses on La3+-based fluorides in aluminosilicate glasses, and the findings may not be directly applicable to other glass systems or dopants.
1：Experimental Design and Method Selection:
Conventional melt-quenching and subsequent heat-treating were employed to prepare transparent GCs. A series of glass compositions were elaborately designed.
2：Sample Selection and Data Sources:
High purity raw materials about 15 g were thoroughly mixed and melt in a covered alumina crucible inside the muffle furnace at 1550 °C for 45 min in air atmosphere to produce a homogeneous melting.
3：List of Experimental Equipment and Materials:
MiniFlex 600 X-ray diffractometer, JEOL JEM-2010 transmission electron microscope, VG Scientific ESCA Lab Mark II spectrometer, Nicolet 8700 Fourier transform infrared spectrophotometer, iHR320 Raman spectrometer, Bruker ADVANCE III HD 400 instruments.
4：Experimental Procedures and Operational Workflow:
The melt was poured into a 300 °C brass copper mold to produce precursor glass (PG). The obtained PGs were crystallized by heat-treatment at 550–750 °C for 2 h.
5：Data Analysis Methods:
XRD patterns, TEM images, XPS spectra, FTIR spectra, Raman spectra, MAS-NMR spectra were analyzed.
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