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Ion-exchanged LTA zeolite derived nepheline phase NaAlSiO4:Eu2+ ceramic phosphor for laser illumination.
- Source :
-
Ceramics International . Nov2021, Vol. 47 Issue 21, p30514-30522. 9p. - Publication Year :
- 2021
-
Abstract
- A reliable yellow phosphor converter that can be efficiently excited by a 405 nm bluish violet laser is in high demand for laser illumination applications. A NaAlSiO 4 :Eu2+ phosphor with a quantum efficiency reaching 92% was obtained using LTA zeolite as the raw material. NaAlSiO 4 :Eu2+ ceramics with suitable porosities for laser illumination were prepared from the phosphor powders via spark plasma sintering. The ceramics lost only 2% of the quantum efficiency compared to the powders, maintained good thermal quenching properties (30% drop at 150 °C), and showed good thermal conductivity (2.02 W‧m−1‧K−1). The NaAlSiO 4 :Eu2+ ceramic with 405 nm bluish violet lasers, with the increase in laser power density to 9.15 W/mm2, exhibited an increasing luminous flux (23.83–70.26 lm) and maintained a stable luminous efficacy (47.7–46.8 lm/W), and the temperature distribution of the ceramic remained uniform and stable under long-time laser irradiation. This indicates that the nepheline-phase NaAlSiO 4 :Eu2+ ceramic is a promising material for laser illumination. [ABSTRACT FROM AUTHOR]
- Subjects :
- *POWDERS
*ZEOLITES
*CERAMICS
*LASERS
*LUMINOUS flux
*PHOSPHORS
*QUANTUM efficiency
Subjects
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 47
- Issue :
- 21
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 152496698
- Full Text :
- https://doi.org/10.1016/j.ceramint.2021.07.229