3~5μm的片状α-Al2O3是白光LED用荧光粉的良好基材。采用水热-热解法控制合成出不同形貌α-Al2O3粉体。以自制的3种形貌氧化铝及市售Y2O3，Ce2O3为原料，AlF3为助溶剂，采用高温固相法合成钇铝石榴石（YAG：Ce3+）黄色荧光粉。结果表明，通过控制不同的添加剂，控制反应条件，可以实现对α-Al2O3粉体形貌和粒径的控制。
The flake Al2O3 powder with a particle size of 3-5 μm is a good base for white LED phosphor powder. α?Al2O3 powder with different morphologies was produced by hydrothermal ? pyrolysis method. The yellow phosphor powder YAG:Ce3 + was synthesized by the high temperature solid state method with the self ? made alumina in three different morphologies and the commercial Y2O3,Ce2O3 as raw materials and aluminum fluoride as cosolvent. The result indicates that the morphology and particle size of Al2O3 powder could be controlled by changing the amount of additives and reaction conditions.
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