关键词: 自蔓延燃烧合成,  , 纯相, 光致发光

Abstract: CaAl₄O₇∶Tb³⁺ and CaAl₄O₇∶Sm³⁺ fluorescent materials were prepared by the selfpropagating combustion synthesis (
SPCS) technology. The structure, morphology and light absorption property of the two fluorescent materials were investigated by Xray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), and ultravioletvisible diffusereflectance spectrum (UVVis DRS), etc. The results show that SPCS technology can significantly reduce the synthesis temperature, crystallinity of samples is good, and the doping of Tb³⁺ and Sm³⁺ does not change monoclinic system structure and space group characteristics of CaAl₄O₇, but it results in the slight lattice distortion and the redshift of absorption peak and absorption band edge. The CaAl₄O₇∶Tb³⁺ and CaAl₄O₇∶Sm³⁺ emit green and pink light, respectively, and their excitation spectra and emission spectra show fine structural characteristics.

Key words: selfpropagating combustion synthesis (SPCS),  , pure phase, photoluminescence