Improved thermal resistance of spherical BaMgAl10O17:Eu blue phosphor prepared by spray pyrolysis
Improved thermal resistance of spherical BaMgAl10O17:Eu blue phosphor prepared by spray pyrolysis
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DOI：
10.1016/j.jlumin.2005.02.019
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发表时间：
2005-11
影响因子：
3.6
通讯作者：
K. Y. Jung;Dong Youl Lee;Y. Kang
中科院分区：
文献类型：
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作者：
K. Y. Jung;Dong Youl Lee;Y. Kang
研究了球形BaMgAl 10 O 17：Eu（BAM）蓝色荧光粉的热分解特性。在这项工作中，我们开发了一种非常简单但非常有效的策略，以最大限度地减少BAM蓝色荧光粉的热降解。为了改善喷雾热解法制备的BAM颗粒的热降解性能，对所制备的BAM颗粒进行了两步后热处理。也就是说，在400°C下在真空气氛下处理颗粒，并在1400°C下连续原位还原。发现两步处理有效地减少了BAM颗粒的色移，这是已知的在等离子体显示面板（PDP）的制造过程中通常观察到的大问题。根据FT-IR分析，真空处理产生了稳定的疏水表面，即使在烘烤过程之后也保持该疏水表面。为了进一步提高真空紫外光照射下的光致发光强度，在这项工作中，BAM颗粒的表面处理由上述两个步骤处理与烷基和有机硅烷基团的改性。结果，光致发光强度增强。因此，可以得出结论，去除存在于表面上或基质中的水（OH基团）以及制造疏水表面有望使BAM颗粒的热降解最小化。
The thermal degradation characteristics of BaMgAl10O17:Eu (BAM) blue phosphor with spherical shape were investigated. In this work, we developed a strategy that is very simple, but very effective to minimize the thermal degradation of BAM blue phosphor. In order to improve the thermal degradation properties of BAM particles prepared by spray pyrolysis, the as-prepared particles were treated by a two-step post thermal treatment. That is, the particles were treated under a vacuum atmosphere at 400°C and successively in situ reduced at 1400°C. It was found that the two-step treatment effectively reduces the color shift of the BAM particles, which is known as a big problem generally observed in the fabrication processes of plasma display panels (PDPs). According to FT-IR analysis, the vacuum treatment produced a stable hydrophobic surface which was maintained even after the baking process. For further improving the photoluminescence intensity under VUV irradiation, in this work, the surface of BAM particles treated by the above two-step treatment was modified with alkyl and organosilane groups. As a result, the photoluminescence intensity was enhanced. Therefore, it was concluded that removing the water (OH groups) existing on the surface or in the matrix as well as making a hydrophobic surface are promised to minimize the thermal degradation of BAM particles.