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Characterization and Luminescence Properties of YAG : Ce 3+ Phosphors by Molten Salt Synthesis
Author(s) -
Yang Huijuan,
Zhu Guisheng,
Yuan Le,
Zhang Chi,
Li Fengsheng,
Xu Huarui,
Yu Aibing
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04948.x
Subject(s) - phosphor , analytical chemistry (journal) , eutectic system , luminescence , particle size , calcination , molten salt , emission spectrum , materials science , particle (ecology) , flux (metallurgy) , mineralogy , chemistry , nuclear chemistry , spectral line , microstructure , metallurgy , chromatography , optoelectronics , biochemistry , physics , oceanography , astronomy , geology , catalysis
The Y 2.9 Ce 0.1 Al 5 O 12 ( YAG : Ce 3+ ) phosphors were successfully prepared via molten salt synthesis ( MSS ) method using the eutectic mixtures of NaNO 2 –KNO 2 or NaCl–KCl as the flux. Using NaCl–KCl as the flux, Y 3 Al 5 O 12 phase is formed above 1000°C, and the as‐prepared YAG : Ce 3+ phosphor with 2 μm average particle size has good emission and excitation spectra. Using NaNO 2 –KNO 2 as the flux, Y 3 Al 5 O 12 phase can be formed at a temperature as low as 400°C, but the as‐prepared YAG : Ce 3+ phosphor with 200 nm average particle size do not have obvious emission and excitation spectra, and after being annealed at 1100°C, the powder also has 200 nm average particle size but has stronger emission and excitation spectra. Compared with the commercial YAG : Ce 3+ phosphor, the emission intensity of the phosphor prepared by MSS using NaNO 2 –KNO 2 as the flux followed by calcination is a little low, but the latter has a smaller particle size, which will reduce the amount of phosphors utilized in white light‐emitting diodes.