The influence of some processing conditions on host crystal structure and phosphorescence properties of SrAl2O4:Eu2+, Dy3+ nanoparticle pigments synthesized by combustion technique

The spectroscopic and host phase properties of SrAl2O4:Eu2+, Dy3+ phosphors with a series of different initiating combustion temperatures, urea concentrations as a fuel and critical pH of precursor solution were investigated. The SrAl2O4:Eu2+, Dy3+ nanoparticle pigments were obtained by exothermic c...

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Bibliographic Details
Published in:Current applied physics 2010, 10(2), , pp.596-600
Main Authors: Shafia, Ehsan, Bodaghi, Masoud, Tahriri, Mohammadreza
Format: Article
Language:English
Subjects:
Combustion
Combustion temperature
Nanomaterials
Nanostructure
Phosphors
Pigments
Ureas
물리학
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Summary:The spectroscopic and host phase properties of SrAl2O4:Eu2+, Dy3+ phosphors with a series of different initiating combustion temperatures, urea concentrations as a fuel and critical pH of precursor solution were investigated. The SrAl2O4:Eu2+, Dy3+ nanoparticle pigments were obtained by exothermic combustion process in less than 5 min. The sample that ignited at an initiating combustion temperature of 600 C exhibited the highest intensity emission peak at 517 nm in which the SrAl2O4 host phase had the maximum fraction of monoclinic SrAl2O4 phase. The excitation spectra consisted of 240 and 254 nm broad peaks. The results showed that the optimum ratio of urea was 2.5 times higher than theoretical quantities for the best emission conditions of SrAl2O4:Eu2+, Dy3+ phosphor particles. The critical pH was obtained at about 5.2. The crystallite size of these pigments was about 40 nm before thermal treatment and 62 nm after thermal treatment, respectively.
ISSN:1567-1739
1878-1675
DOI:10.1016/j.cap.2009.07.028