【摘要】 采用高温固相法合成Cr³⁺掺杂的CaAl₁₂O₁₉荧光粉,通过添加不同量的助溶剂H₃BO₃,研究了对该荧光粉的合成和发光性能的影响。XRD表明,在1 500℃下合成出了纯的相,助溶剂量在3mol%（占Al₂O₃摩尔量的比）最佳。通过CaAl₁₂O₁₉∶Cr³⁺荧光粉激发光谱和发射光谱,激发光谱出现了410nm和580nm两处宽峰,分别属于Cr³⁺的4A₂→4T₁和4A₂→4T₂的跃迁;发射光谱在685nm出现最强峰,属于Cr³⁺的2E2→4A2的跃迁,不同浓度Cr³⁺掺杂的发射光谱表明,最佳掺杂浓度在0.5mol%。通过CaAl₁₂O₁₉∶Cr³⁺色度图（x=0.679 93,y=0.319 83）可以看出,该荧光粉的优良的深红色发光性。更多还原

【Abstract】 Calcium acuminate matrix(CaAl₁₂O₁₉)was prepared at temperatures 1 500℃ by solid state reaction,and the influences of the concentration of H₃BO₃ on the basis of the optimal Cr-doping amount in CaAl₁₂O₁₉ phosphor are also discussed in detail.XRD indicated a high purity crystalline phase was synthesized at the temperature,the optimal concentration of H₃BO₃ is 3mol%;a spectroscopy analysis of Cr³⁺doped CaAl₁₂O₁₉ based on excitation spectrum and emission spectra was performed.Broad band excitation spectra are observed with 415 nm and 580 nm,respectively owing to the 4A₂→4T₁and 4A₂→4T₂transition of Cr³⁺ion,and emission spectra with the strongest emission peak at 685 nm owing to the 2E₂→4A₂transition of Cr³⁺ion.Also the influences of the concentration of Cr³⁺ion on the luminescent properties in CaAl₁₂O₁₉ compounds were investigated,which the optimal concentration is 3mol%.CaAl₁₂O₁₉∶Cr³⁺is an excellent deep red light-emitting phosphors through its chromaticity diagram（x=0.679 93,y=0.319 83）.更多还原