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01-08-2013

Phase composition and luminescent properties of strontium aluminate long persistence phosphor synthesized by combustion synthesis method with different Sr/Al ratios

Authors: Wen-Zhou Sun, Yu-Hong Chen, Lan-Er Wu, Yong Jiang

Published in: Rare Metals | Issue 4/2013

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Abstract

Strontium aluminate long persistence phosphors are synthesized by combustion method. By controlling the raw material ratio (Sr/Al), the effects of phase composition on subsequent spectroscopic properties of phosphors are studied. Results show that the phase composition changes from strontium-rich phase to aluminum-rich phase with the decrease of Sr/Al: when the rate of Al/Sr changes from 3:1 to 1:1, the main crystal phase of samples is Sr₃Al₂O₆, and it exhibits the characteristic fluorescence of Eu³⁺ in the lattice of Sr₃Al₂O₆; when the rate of Al/Sr is between 1:2 and 2:7, phase composition is the mixture of SrAl₂O₄ and SrAl₄O₇, and it emits the characteristic fluorescence of Eu²⁺ in SrAl₂O₄ but not in SrAl₄O₇; when Al/Sr decreases to 1:4 or even 1:12, the main crystal phase of samples transform into SrAl₁₂O₁₉, and the characteristic emission peak is about 470 nm, which corresponds to the characteristic emission of Eu²⁺ in SrAl₁₂O₁₉. At the end of the article, the influence laws of two different synthesis methods on phase composition of samples between high-temperature solid method and combustion method are compared. Compared with the high-temperature solid method, the rule of influence is similar, but the mole ratio of Al/Sr in products is always higher than the initial ratio of the raw material, and compounds like Sr₄Al₁₄O₂₅ are not obtained by combustion method.

previous article Reaction mechanism of self-propagating magnesiothermic reduction of ZrB2 powders

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Title: Phase composition and luminescent properties of strontium aluminate long persistence phosphor synthesized by combustion synthesis method with different Sr/Al ratios
Authors: Wen-Zhou Sun
Yu-Hong Chen
Lan-Er Wu
Yong Jiang
Publication date: 01-08-2013
Publisher: Springer Berlin Heidelberg
Published in: Rare Metals / Issue 4/2013
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI: https://doi.org/10.1007/s12598-013-0111-4

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