Morphological and Optical Characteristics of Y2O3:Eu Phosphor Particles Prepared by Flame Spray Pyrolysis
Morphological and Optical Characteristics of Y2O3:Eu Phosphor Particles Prepared by Flame Spray Pyrolysis
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火焰喷射热解法制备Y2O3:Eu荧光粉颗粒的形貌和光学特性
DOI：
10.1143/jjap.40.4083
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
H. Park
中科院分区：
文献类型：
--
作者：
Y. Kang;Dae Jong Seo;Seung;H. Park
采用火焰喷雾热分解法制备了Y2O3：Eu荧光粉，并与常规喷雾热分解法制备的荧光粉进行了比较。火焰喷雾热裂解法制备的颗粒形貌较均匀、致密，比普通喷雾热裂解法制备的颗粒更细小。火焰温度是火焰喷雾热解法制备荧光粉的一个重要因素。为了获得具有均匀致密结构的Y2O3：Eu颗粒，需要足够高的温度以形成单斜相。火焰温度过低，颗粒未完全熔化，生成非球形、空心的立方相颗粒;火焰温度过高，颗粒蒸发，生成大量纳米颗粒。对所制备的具有单斜相和致密结构的颗粒进行分步后处理，得到了高亮度的立方相Y2O3：Eu荧光粉颗粒。通过火焰喷雾热解法制备的Y2O3：Eu荧光粉颗粒的光致发光强度是普通喷雾热解法制备的颗粒的120%。
Y2O3:Eu phosphor particles were prepared by flame spray pyrolysis and compared with the particles prepared by general spray pyrolysis. The particles prepared by flame spray pyrolysis had a spherical and dense morphology and were finer than the particles prepared by general spray pyrolysis. Flame temperature was an important factor in the preparation of the phosphor particles by flame spray pyrolysis. To obtain Y2O3:Eu particles with a uniformly dense structure, a sufficiently high temperature to form monoclinic phase was required. Too low flame temperature generated nonspherical and hollow particles with cubic phase because the particles did not melt completely, and too high flame temperature of flame generated many nanoparticles due to evaporation. After stepwise post-treatment of as-prepared particles with monoclinic phase and the dense structure, Y2O3:Eu phosphor particles with high brightness and cubic phase were obtained. The Y2O3:Eu phosphor particles prepared by flame spray pyrolysis showed 120% photoluminescence intensity in comparison with the particles prepared by general spray pyrolysis.