Surface Modification of SrAl2O4:Eu2+, Dy3+ Phosphors Using Silica Encapsulation

Rui Fang Li; Jun Wei Ye; Jing Hui Wang; Xiao Bin Lu; Yuan Lin; Gui Ling Ning

doi:10.4028/www.scientific.net/AMR.58.199

Paper Titles

Surface Encapsulation of Nano-CaCO₃ Particle by In Situ Emulsion Polymerization
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Study of Organic Modification for SrAl₂O₄:Eu²⁺, Dy³⁺ Phosphors
p.169

Study on Size Distribution of Oolitic Hematite
p.177

Surface Coating of TiO₂ Powder
p.183

Surface Modification of Basic Magnesium Sulfate Whiskers
p.191

Surface Modification of SrAl₂O₄:Eu²⁺, Dy³⁺ Phosphors Using Silica Encapsulation
p.199

Synthesis and Characterization of LiFePO₄ / PPy Composite Powders
p.205

The Effect of Posterior Disposal Process on Gel Viscosity of Montmorillonite/Octadecyl Trimethy Ammonium Chloride Complexes
p.211

Toughening of Polypropylene with Calcium Sulfate Whiskers Treated by Coupling Agents
p.225

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 58Surface Modification of SrAl2O4:Eu2+, Dy3+...

Surface Modification of SrAl₂O₄:Eu²⁺, Dy³⁺ Phosphors Using Silica Encapsulation

Abstract:

Silica encapsulated phosphors SrAl2O4:Eu2+, Dy3+ have been synthesized by non-homogeneous phase coring method, in which glycerol was firstly used as dispersion medium and hyper-dispersant was introduced as additive. IR, BET and scanning electron microscopy (SEM) demonstrated that a dense layer of silica was formed on the surface of phosphor SrAl2O4:Eu2+, Dy3+. The results showed that the encapsulated phosphors possess good properties in water-resistance, heat-resistance and dispersibility when encapsulation amount reached 8 wt. %. Moreover, the photoluminescence intensity of phosphors SrAl2O4:Eu2+, Dy3+ was improved apparently after surface modification. All results revealed that silica encapsulation would effectively improve alkaline earth aluminates phosphors’ properties and using glycerol as the dispersion medium is helpful to silica encapsulation.