摘 要: 以 CaCO₃、Eu₂O₃ 和 Li2CO3 为主要原料, 采用高温固相法, 首次 制备 CaCO₃:Eu³⁺, Li⁺ 红色荧光粉。通过对前驱物进行同步差热分析 (TG- SDTA) , 确定其煅烧温度; 利用 X 射线衍射(XRD)、傅立叶变换 红外光谱( FT- IR) 和拉曼光谱对样品的结构进行表征; 采用荧光光度 仪对样品的发光性能进行测试。结果表明: 前驱物的煅烧温度为 655 ℃时, 样品主晶相为方解石型 CaCO₃, 掺杂 Eu³⁺ 和 Li⁺ 离子分别作为 发光中心和敏化剂进入到 CaCO₃ 的晶格中。荧光粉的最大激发峰位 于 272 nm, 属于紫外激发, 最大发射峰位于 608 nm 附近, 对应于 Eu³⁺离子的 ⁵d₀ →⁷f ₂ 跃迁, 并且 Eu³⁺ 离子在 CaCO₃ 基质中处于偏离或无 反演对称中心的格位上。 

关键词: 发光材料; 荧光; 高温固相法

Abstract: CaCO₃, Eu₂O₃ and Li₂CO₃ were used as primary raw materials to prepare red phosphor CaCO₃:Eu³⁺, Li⁺ by high temperature solid-state reaction for the first time. The sinter temperature was ensured by analysis of precursor on TG- SDTA. With XRD, FT- IR, Raman spectroscopy and fluorescence photometer examination were used to analyse the struc ture and fluorescence capability of pattern. The results showed that the sinter temperature was 655 ℃. Eu³⁺and Li⁺ acted as luminescent and sen sation probe to determine calcite phase of CaCO₃, separately. The maxi mum excitation spectrum of the phosphor peaks was 272 nm, which be longed to UV excitation. The maximum emission wavelength was 608 nm, corresponding to ⁵d₀ →⁷f ₂ of Eu³⁺, indicating that the Eu³⁺ ion locat ed in a low symmetry site, or occupied the sites derived from an inversion center in this compound. 

Keywords: phosphor; fluorescence; high temperature solid-state method