Morphological Control of Y2O3:Eu Phosphor Particles by Adding Polymeric Precursors in Spray Pyrolysis
Morphological Control of Y2O3:Eu Phosphor Particles by Adding Polymeric Precursors in Spray Pyrolysis
复制标题
喷雾热解中添加聚合物前驱体对 Y2O3:Eu 荧光粉颗粒的形貌控制
DOI：
10.1143/jjap.41.3006
复制
发表时间：
2002
影响因子：
1.5
通讯作者：
H. Park
中科院分区：
文献类型：
--
作者：
J. Sohn;Y. Kang;H. Park
采用喷雾热解中试工艺，在喷雾溶液中加入聚合物前驱体，制备了球状致密的Y2O3:Eu荧光粉颗粒。无聚合物前驱体的溶液制备的Y2O3:Eu颗粒具有中空和断裂结构。然而，由柠檬酸和乙二醇溶液制备的颗粒具有完全的球形和致密的形态。羧基和醇基酯化反应形成的聚合链改变了液滴的干燥和分解阶段。柠檬酸、乙二醇的配比及其浓度是控制Y2O3:Eu荧光粉颗粒形貌的关键因素。在添加和不添加柠檬酸和乙二醇的溶液中制备的颗粒的平均晶粒尺寸分别为49 nm和33 nm。由适当浓度的柠檬酸和乙二醇溶液制备的颗粒的最大光致发光强度是由不含聚合物前驱体的溶液制备的颗粒的125%。
The Y2O3:Eu phosphor particles having a spherical shape and dense morphology were prepared by a pilot-scale spray pyrolysis process which involved the introduction of polymeric precursors in the spray solution. The Y2O3:Eu particles prepared from the solution without polymeric precursors had a hollow and fractured structures. However, the particles prepared from the solutions with citric acid and ethylene glycol had a completely spherical shape and dense morphology. The polymeric chains formed from the esterification reaction between carboxyl and alcohol groups changed the drying and decomposition stages of the droplets. The ratio of citric acid, ethylene glycol and their concentrations were critical factors in the control of the morphology of the Y2O3:Eu phosphor particles. The mean crystallite sizes of the particles prepared from solutions with and without citric acid and ethylene glycol were 49 nm and 33 nm, respectively. The maximum photoluminescence intensity of the particles prepared from the solution with suitable concentrations of citric acid and ethylene glycol was 125% of that of the particles prepared from the solution without polymeric precursors.