Morphology and microstructure of crystalline YAG-Al2O3 composites grown by the horizontal directional crystallization
Source abstract
Abstract
The peculiarities of the horizontal directional crystallization of the melt (Y 3 Al 5 O 12 , 90 wt% and Al 2 O 3 10 wt%) were studied. The evolution of both the morphology of the ingot and the microstructure of the inclusions as a function of the rate of melt solidification was established. It was shown that the crystallization of the ingot begins with the growth of the YAG single crystal, which turns into the YAG cellular growth, with cells surrounded by the YAG-Al 2 O 3 eutectic. Cellular growth is replaced by dendritic YAG growth followed by spontaneous crystallization. The inclusions consist of eutectic YAG-Al 2 O 3 , which usually presented pores caused by the solidification of the eutectic in the confined volume. The morphological stability of the crystallization front is partially kept until dendritic growth occurs. Parts of the ingot with a dendritic structure can be an effective light-scattering medium that can be used as a host for luminescent ions in converters of solid-state light sources.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Photorefractive and Nonlinear Optics · Glass properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (38)
Show source-provided references
1. High luminous flux from single crystal phosphor-converted laser-based white lighting system10.1364/OE.24.00A215 ↗
2. Efficient and stable laser-driven white lighting10.1063/1.4813837 ↗
3. O. Bjarlin Jensen et al., Limitations to emission spot size in laser lighting, in: Light-Emitting Devices, Materials, and Applications XXIV, San Francisco, United States, Feb. 2020, p. 10. doi: 10.1117/12.2542674.10.1117/12.2542674 ↗
4. Color conversion materials for high‐brightness laser‐driven solid‐state lighting10.1002/lpor.201800173 ↗
5. Infrared laser stimulated broadband white emission of transparent Cr:YAG ceramics obtained by solid state reaction sintering
6. Kinetics of Cr3+ to Cr4+ ion valence transformations and intra-lattice cation exchange of Cr4+ in Cr,Ca:YAG ceramics used as laser gain and passive Q-switching media10.1063/1.5118321 ↗
7. Fabrication of Nd:YAG transparent ceramics with TEOS, MgO and compound additives as sintering aids10.1016/j.jallcom.2010.04.151 ↗
8. Fabrication and properties of highly transparent Er:YAG ceramics10.1016/j.optmat.2011.05.014 ↗
9. Review of luminescent properties of Ce3+-doped garnet phosphors: new insight into the effect of crystal and electronic structure
10. Single crystalline YAG:Ce phosphor for powerful solid-state sources of white light. The influence of production conditions on luminescence properties and lighting characteristics10.1134/S0030400X16050210 ↗
11. Tunable YAG:Ce3+ ceramic phosphors for white laser-diode lighting in transmissive/reflective models10.1016/j.materresbull.2021.111297 ↗
12. High-performance Al2O3–Ce:YAG ceramics for white LED and LD by the optimization of Ce3+ concentration10.1016/j.optmat.2020.110448 ↗
13. Microstructures, optical properties and application in WLEDs of large-size YAG:Ce3+-Al2O3 eutectic grown by HDS method10.1016/j.jallcom.2018.12.209 ↗
14. An advanced laser headlight module employing highly reliable glass phosphor10.1364/OE.27.001808 ↗
15. Advances in transparent glass–ceramic phosphors for white light-emitting diodes-a review10.1016/j.jeurceramsoc.2014.10.002 ↗
16. Transparent Ce3+: Y3Al5O12 glass ceramic for organic-resin-free white-light-emitting diodes10.1016/j.ceramint.2014.06.073 ↗
17. Review-a review on phosphor in glass as a high power LED color converter10.1149/2.0142001JSS ↗
18. Modeling of reflection-type laser-driven white lighting considering phosphor particles and surface topography10.1364/OE.23.018872 ↗
19. Efficiency of planar light converters based on Al2O3-YAG:Ce eutectic crystals
20. Phase composition, microstructure and luminescent property evolutions in ‘light-scattering enhanced’ Al2O3-Y3Al5O12:Ce3+ ceramic phosphors10.1016/j.jeurceramsoc.2018.03.043 ↗
21. Al2O3–YAG:Ce composite phosphor ceramic: a thermally robust and efficient color converter for solid state laser lighting10.1039/C6TC03215J ↗
22. Novel high-thermal-conductivity composite ceramic phosphors for high-brightness laser-driven lighting10.1039/D1TC02202D ↗
23. Durable, ultraluminous structure for incandescent, high-power white-LED10.1111/j.1744-7402.2006.02071.x ↗
24. Thermally self-managing YAG:Ce–Al2O3 color converters enabling high-brightness laser-driven solid state lighting in a transmissive configuration10.1039/C9TC00506D ↗
25. Colony structure in Ce-doped Al2O3/YAG eutectic systems grown by vertical Bridgman technique10.1016/j.jcrysgro.2016.05.003 ↗
26. The growth of Al2O3/YAG:Ce melt growth composite by the vertical Bridgman technique using an a-axis Al2O3 seed10.1016/j.jcrysgro.2015.06.023 ↗
27. Interface structure and defects in directionally solidified oxide–oxide eutectic composites10.1007/s10853-020-04389-w ↗
28. Crystallography and interfacial structure in a directionally solidified Al2O3/Y3Al5O12/ZrO2 eutectic crystal10.1016/j.scriptamat.2017.10.008 ↗
29. Microstructural stability and mechanical properties of directionally solidified alumina/YAG eutectic monofilaments10.1016/S0955-2219(99)00125-9 ↗
30. Fracture behavior of directionally solidified CeO2- and Pr2O3-doped Y3Al5O12/Al2O3 eutectic composites10.1016/S0921-5093(01)01748-8 ↗
31. Microstructure and crystallography of Al2O3–Y3Al5O12–ZrO2 ternary eutectic oxide grown by the micropulling down technique10.1016/j.jcrysgro.2015.07.020 ↗
32. Growth of YAG:Ce3+-Al2O3 eutectic ceramic by HDS method and its application for white LEDs10.1016/j.jeurceramsoc.2017.06.014 ↗
33. Ce-doped Al2O3−YAG eutectic and its application for white LEDs10.1016/j.optmat.2013.05.035 ↗
34. Melting behaviour and metastability of yttrium aluminium garnet (YAG) and YAlO3 determined by optical differential thermal analysis10.1007/BF00550589 ↗
35. Kurz · 1992
36. Selection of eutectic systems in Al2O3-Y2O3 ceramics
37. Compositions of melts for growth of functional single crystals of complex oxides and other compounds10.1134/S1063774508070225 ↗
38. Thermodynamic calculation of the quasibinary Al2O3-Y2O3 system and the Y-Al-O ternary system10.1515/ijmr-1996-870405 ↗