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Investigation of the structural, morphological and luminescence properties of MgAl2O4:Cr3+ nano powders

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Abstract

Cr3+ doped MgAl2O4 nano powders were prepared by the Pechini-type sol–gel process. Comprehensive analysis for the MgAl2-xO4:xCr3+(0 ≤ x ≤ 0.05) nano crystalline was performed using X-ray Diffraction, Fourier Transform Infrared Spectroscopy, Field Emission Scanning Electron Microscope, Diffuse Reflectance Spectra, Excitation and Emission Spectra. The powders calcined at 1100 °C were spherical with the average particle size of 90 nm, which were suitable for the preparation of the transparent ceramics. The crystal field, electron-vibration coupling and energy levels splitting of MgAl2O4: Cr3+ were discussed. The Cr3+ was suited in a strong crystal field, and the value of Dq/B = 3.9. At 457 nm excitations, the characteristic zero phonon lines appeared at 690 nm with the FWHM about 8 nm. The quenching concentration of Cr3+ was about 0.04.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 51802272) and the Longshan academic talent research support plan of Southwest University of Science and Technology (18LZXY02).

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  1. State Key Laboratory for Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang, 621010, China

    Yan Hao & Kaipeng Wu

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  1. Yan Hao
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  2. Kaipeng Wu
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Correspondence to Yan Hao.

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Hao, Y., Wu, K. Investigation of the structural, morphological and luminescence properties of MgAl2O4:Cr3+ nano powders. J Mater Sci: Mater Electron 30, 13151–13157 (2019). https://doi.org/10.1007/s10854-019-01678-2

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  • DOI: https://doi.org/10.1007/s10854-019-01678-2

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