Publication Date:
2015-05-24
Description:
High-performance BaMgAl 10 O 17 :Eu 2+ (BAM) phosphor was prepared by a facile aqua-suspension method, based on the in situ surface charge modification of starting powders with the aid of the γ-Al 2 O 3 porous structure. When stirred in de-ionized water at 80°C, the starting powders of BaCO 3 , MgO, and Eu 2 O 3 were positive surface charged, and attracted by the porous and negative charged γ-Al 2 O 3 powders. Through the electrostatic effect, high uniformed BAM precursor was achieved after the aqua-medium was removed. Fourier transform infrared (FTIR) spectra indicated some new chemical bonds among the reactants of the BAM precursor, which improved the powder activity and made it possible to achieve high-performance BAM phosphor at a lower calcination temperature. The obtained BAM phosphor exhibited a narrow particle size distribution, enhanced crystallinity, and a short decay time.
Print ISSN:
1546-542X
Electronic ISSN:
1744-7402
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
