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Minerals 2017, 7(3), 44; https://doi.org/10.3390/min7030044

Recycling Y and Eu from Waste Fluorescent Powder and High Temperature Solid-State Synthesis of Y2O3:Eu Phosphors

1
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
2
School of Chemistry and Life Science, Hubei University of Education, Wuhan 430205, China
*
Author to whom correspondence should be addressed.
Academic Editor: Radostina G. Atanassova
Received: 11 January 2017 / Revised: 15 March 2017 / Accepted: 15 March 2017 / Published: 20 March 2017
(This article belongs to the Special Issue Mineral Resources and the Environment)
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Abstract

Y2O3:Eu were prepared through precursors synthesized by leaching tests, removing impurities, enrichment of Y and Eu from residual purified liquors, annealing treatment, and high temperature solid-state reaction method, which is the most suitable for large-scale production. The analysis of product shows that the purity is 99.42%. The resultant powders were characterized by X-ray diffraction (XRD), differential thermal analysis (TG-DTA), scanning electron microscope (SEM), and photoluminescence (PL). Compared with the commercial phosphors, the XRD spectrum of the product samples revealed the synthesized particles to have a pure cubic Y2O3:Eu structure without any impurities in the crystalline phase. On the morphology, the Y2O3:Eu particles synthesized by a combustion and high temperature solid state process with sintering aids, were large and uniform. For luminescence property, the emission intensity of Y2O3:Eu phosphors synthesized by combustion process and high temperature solid state process with sintering aids were higher than those without sintering aids, at 1400 °C. View Full-Text
Keywords: waste fluorescent powder; leaching; impurities removal; synthesis; Y2O3:Eu particles waste fluorescent powder; leaching; impurities removal; synthesis; Y2O3:Eu particles
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Chen, X.; Liu, N.; Mei, G.; Yu, M. Recycling Y and Eu from Waste Fluorescent Powder and High Temperature Solid-State Synthesis of Y2O3:Eu Phosphors. Minerals 2017, 7, 44.

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