长余辉发光材料的制备及其反射光谱特征

Fabrication of Long After-glow Phosphorescent Material and Its Characteristics of Reflective Spectra

研究了目前长余辉发光材料的两种主要基本制备方法“干法”和“湿法” ,干法是将各种原料按配方比例球磨粉碎 ,均匀混合 ,然后在惰性和还原性气体的保护下 ,于 10 0 0～ 16 0 0℃的高温中灼烧反应数小时生成。湿法是用金属硝酸盐和有机还原剂的混合水溶液 ,在较低的温度 (5 0 0℃ )下发生氧化还原燃烧反应来一步快速生成产品。对比了产品的性能并作了相关讨论 ,用紫外 -可见反射光谱测定分析了所制备样品在蓄光前后的光谱特征并作了探讨。结果表明 ,除表观密度外 ,干法与湿法制备的长余辉发光材料的主要性质相同 ,紫外

Two methods, which are dry and wet method, nowadays to fabricate long after-glow phosphorescent materials are investigated. Dry method mixes and mills the raw materials thoroughly as per proportion and then sinters the mixture at 1 000-1 600 ℃ for 2-4 hours under a reducing and inert atmosphere, while wet method utilizes the combustion reaction of self-propagating high-temperature synthesis(SHS) of metal nitrates and organic reductant to yield the resultant at one step. The properties and their difference of the samples obtained from two methods are discussed and compared together. UV-VIS reflective spectrophotometer is applied to determine and analyze the characteristics of the samples before and after their absorption of light. The result shows that the properties of the samples fabricated from dry and wet technique are similar except their apparent density, and UV-VIS reflective spectrum states clearly the spectral characteristics of long after-glow phosphorescent materials.