Formation Mechanisms and Control Method of Aluminum-Containing Impurity in High-Temperature Spray Pyrolysis of Y 2 O 3 : Eu3 + Phosphor
Formation Mechanisms and Control Method of Aluminum-Containing Impurity in High-Temperature Spray Pyrolysis of Y 2 O 3 : Eu3 + Phosphor
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DOI：
10.1149/1.1669342
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发表时间：
2004-05
影响因子：
--
通讯作者：
Y. Shimomura;N. Kijima
中科院分区：
文献类型：
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作者：
Y. Shimomura;N. Kijima
通过热力学数据库计算炉内平衡组成，研究了Y 3 O 3 :Eu 3 + 在1800℃喷雾热解过程中Y 4 Al 2 O 9 的形成机理。在水存在的高温下，从氧化铝反应管挥发的气态铝化合物和作为荧光体原料的钇化合物生成Y 4 Al 2 O 9 。计算还表明，减少炉内水量会减少铝化合物的挥发量。使用扩散干燥器减少水量控制了杂质的产生。
The mechanism of formation of Y 4 Al 2 O 9 during spray pyrolysis of Y 3 O 3 :Eu 3 + at 1800°C was studied by calculating the equilibrium composition in the furnace using a thermodynamic database. At high temperature in the presence of water, Y 4 Al 2 O 9 was generated from gaseous aluminum compounds volatilized from the alumina reactor tube and yttrium compounds, which were the raw materials of the phosphor. The calculation also indicated that reduction of the amount of water in the furnace would decrease the amounts of volatilized aluminum compounds. Decreasing the amount of water using a diffusion drier controlled the generation of impurities.