In this paper, the samples with different concentrations of Li2CaSiO4: Eu2 + were prepared by solid-phase method。 The optimum temperature was determined by XRD powder diffraction。 850 ℃, when the powder is a single pure phase, without any excess hybrids, their crystal structure for the tetragonal phase。 After that, the fluorescence properties of samples with different concentrations were characterized by testing their photoluminescence spectra (PLS) and fluorescence emission spectroscopy (PL)。 The emission wavelength is 288nm and the emission wavelength is 487nm, which is the broadband emission, and the optimal doping concentration of E2 + is the emission wavelength of 288nm, the emission wavelength is 487nm, and the emission wavelength is blue。 0。01 (atomic ratio 0。1%)。 By comparing the emission spectra of the samples with different doping concentrations, the main factors of the concentration quenching were analyzed。 The quenching point of the phosphors was found to be 0。01, and the main factors of the quenching of the phosphors were the bis Pole - bipolar electronic interaction。

Key words: Li2CaSiO4; Solid Phase Reaction; Phosphor; Lithium Silicate; Thermoluminescence

目录

第一章 绪论 6

1。1 荧光粉材料的介绍 7

1。1。1  简介 7

1。1。2  应用 7

1。2 硅酸盐荧光粉材料的制备方法 8

1。2。1 高温固相法 8

1。2。2微波辐射法 8

1。2。3溶胶凝胶法 8

1。2。3燃烧法 8

1。2。4水热合成法 8

1。2。5共沉淀法 9

1。2。6熔盐合成法 9

1。3  硅酸盐荧光粉材料的发光机理 9

1。4 Eu2+与 Tb3+  离子发光特性 10

1。4。1   Eu2+离子的发光特性 10

1。4。2   Tb3+离子的发光特性 11

1。5  硅酸盐基质发光材料的特点 11

1。6 药品的选用 12

1。7 仪器和设备 13

1。8  Li2CaSiO4基质反应温度的选定 14

1。9  本文的目的、内容 15

1。9。1   本文的研究目的 15

1。9。2   本文进行的研究内容 15

第二章 Li2CaSiO4:Tb3+的发光特性 16

2。1   实验设备及技术方案 16

2。1。1   实验药品及设备 16

2。1。2   实验技术方案 16

2。2   实验结果与讨论 16

2。2。1   荧光粉体的相组成分析 16

2。2。2   Li2CaSiO4:Tb3+的发光特性 17

2。3   本章小结 20

第三章 Li2CaSiO4:Eu2+的发光特性 21

3。1   实验技术方案