CaO:Eu³⁺ phosphors were prepared by calcination of CaCO₃:Eu³⁺ nanoparticles. The as-obtained samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), and photoluminescent (PL) techniques. The results reveal that the CaO:Eu³⁺ phosphors obtained by this method have significant advantages over those obtained by the traditional high temperature solid-phase method in terms of phase purity, crystallinity, particle size and luminescence properties. In addition, Eu³⁺ ions are also used as spectroscopic probe to analyse the relationship between the local crystal structure and the luminescence properties of CaCO₃:Eu³⁺ and CaO:Eu³⁺. The study indicates that the excitation spectrum of CaO:0.02Eu³⁺ have the stronger Eu-O charge transfer band (CTB) than that of CaCO₃:0.02Eu³⁺, which enhances the luminescence and makes it more suitable for deep ultraviolet excitation. Finally, the luminescent properties and local structure of CaO:xEu³⁺ phosphors was also investigated.

CaO:Eu ³⁺磷光体通过CaCO ₃ :Eu ³⁺纳米颗粒的煅烧制备。所获得的样品通过 X 射线衍射 (XRD)、场发射扫描电子显微镜 (SEM) 和光致发光 (PL) 技术进行表征。结果表明，该方法获得的CaO:Eu ³⁺荧光粉在相纯度、结晶度、粒径和发光性能等方面均优于传统高温固相法获得的荧光粉。此外，Eu ³⁺离子还用作光谱探针，分析CaCO ₃ :Eu ³⁺局部晶体结构与发光特性的关系和 CaO:Eu ³⁺。研究表明，CaO的激发光谱：0.02Eu ³⁺具有较强的Eu-O电荷传输带（CTB）比碳酸钙的₃：0.02Eu ³⁺，这增强了发光，使之更适合于深紫外线激发. 最后，还研究了 CaO:xEu ³⁺荧光粉的发光特性和局部结构。