【摘要】 研究Cr3+ 离子掺杂固体物质的制备工艺以及光谱特性有助于开发新的光学材料。本研究分别用提拉法技术生长了Cr3+ ∶BeAl2 O4 晶体,用坩埚下降法技术生长了Cr3+ ∶LiNbO3晶体,以及用高温熔融法技术研制了ZnO Al2 O3 SiO2 微晶玻璃。获得了生长优质Cr3+ ∶BeAl2 O4 与Cr3+ ∶LiNbO3的工艺参数。分别测定与讨论了Cr3+ 离子在上述不同介质中的吸收光谱与荧光光谱特征。实验发现Cr3+ 离子在不同介质中,其吸收光谱与荧光光谱的位置与形状在不同基质中发生很大的差异。在Cr3+ ∶BeAl2 O4 与Cr3+ ∶LiNbO3晶体中均观测到尖锐的R线荧光。从其相应的光谱特性大致估算了Cr3+ 离子在不同介质中的晶格场参数。从Dq/B值数据判断Cr3+ ∶BeAl2 O4 与Cr3+ ∶LiNbO3晶体属于强晶格场,Cr3+ ∶ZnO Al2 O3 SiO2 与其微晶玻璃属于弱晶格场。更多还原

【Abstract】 Cr 3+ is an important fluorescent ion. The investigation on the fabricating techniques of Cr 3+ ion in solid-state materials and characteristics of optical spectra is helpful to search for novel optical materials. The Cr 3+ ∶BeAl₂O₄ crystal, Cr 3+ ∶LiNbO₃ crystal and ZnO-Al₂O₃-SiO₂ glass-ceramic were obtained by Czochralski technique, Bridgman method and melting processing. The optical absorption and emission spectra of the above Cr 3+ -incorporated solid-state materials were recorded. The technical parameters for growing high quality Cr 3+ ∶BeAl₂O₄ and Cr 3+ ∶LiNbO₃ crystals were obtained. The results indicate that the optical absorption and fluorescence spectra of Cr 3+ show quite differences in various matrices. The sharp line emissions were observed in Cr 3+ ∶BeAl₂O₄ and Cr 3+ ∶ LiNbO₃ crystals. The crystal field strengths for Cr 3+ in different matrices were calculated from their corresponding spectra. The Dq/B value found indicates that Cr 3+ ∶BeAl₂O₄ and Cr 3+ ∶LiNbO₃ belong to the high-field site crystals, while Cr 3+ ∶ZnO-Al₂O₃-SiO₂ glass and glass-ceramic belong to the weak-field site crystals.更多还原