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

  • Xiao-Juan Zhang
Article

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.

Keywords

Scheelite CaWO4 SrWO4 Metal Tungstate BaWO4 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

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

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.School of ScienceXi’an Polytechnic UniversityXi’anChina

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