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(Sr1−xCax)WO4 and (Sr1−xCax)WO4:Eu3+ nanoparticles: synthesis and luminescence

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Abstract

(Sr1−xCax)WO4 and (Sr1−xCax)WO4:0.05Eu3+ nanoparticles were synthesized by precipitation without using any complexing agent. The XRD patterns show that the obtained samples present a scheelite-type tetragonal structure without deleterious phase, and the increase of Ca concentration decreases the cell volume of materials. The TGA/DTA curve shows that the materials began to crystallize at temperature of 650 °C. The excitation and emission spectra of (Sr1−xCax)WO4 samples show bands originating from the charge transfers within WO4 2− groups. All (Sr1−xCax)WO4 samples show broad blue emission at room temperature. The excitation and emission spectra of (Sr1−xCax)WO4:0.05Eu3+ samples show bands originating from the charge transfers of Eu3+ ions. All (Sr1−xCax)WO4:0.05Eu3+ samples show prominent red emission at room temperature. The substitutions of Ca2+ ions to Sr2+ ions have obvious influence on luminescence properties. The intensity and quantum efficiency increase with the substituted Ca concentrations.

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Acknowledgments

This work is supported financially by Dr. Fund of Xi’an Polytechnic University (No. bs1341).

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Correspondence to Xiao-Juan Zhang.

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Zhang, XJ. (Sr1−xCax)WO4 and (Sr1−xCax)WO4:Eu3+ nanoparticles: synthesis and luminescence. J Mater Sci: Mater Electron 25, 5496–5500 (2014). https://doi.org/10.1007/s10854-014-2334-z

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  • DOI: https://doi.org/10.1007/s10854-014-2334-z

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