Method for preparing YAG (yttrium aluminum garnet) ceramic fluorescent sheet by oxygen sintering: Fid-Bau Portal

Method for preparing YAG (yttrium aluminum garnet) ceramic fluorescent sheet by oxygen sintering

WANG TENGFEI / ZHAO YIZHUO / QIN YUCHEN / DONG FEI / WANG SHILI

The invention relates to the technical field of LED (Light Emitting Diode) luminescent materials, and discloses a method for preparing a YAG (Yttrium Aluminum Garnet) ceramic fluorescent sheet by oxygen sintering, the raw materials of the YAG ceramic fluorescent sheet comprise high-purity aluminum oxide, yttrium oxide, cerium oxide, magnesium oxide and tetraethoxysilane; the preparation method comprises the following steps: step 1, accurately weighing high-purity aluminum oxide powder, yttrium oxide powder, cerium oxide powder, magnesium oxide powder and tetraethoxysilane powder; step 2, putting the weighed high-purity aluminum oxide powder, yttrium oxide powder, cerium oxide powder, magnesium oxide powder and tetraethoxysilane powder into a mixer, and fully and uniformly mixing the weighed high-purity aluminum oxide powder, yttrium oxide powder, cerium oxide powder, magnesium oxide powder and tetraethoxysilane powder; the prepared YAG ceramic fluorescent sheet is good in light transmission performance, high in thermal stability and good in weather resistance, and the problems of poor weather resistance, poor thermal stability, yellowing degradation, low optical density and the like of traditional LED packaging are solved.

本发明涉及LED发光材料技术领域，公开了氧气烧结制备YAG陶瓷荧光片的方法，所述YAG陶瓷荧光片的原料包括高纯氧化铝、氧化钇、氧化铈、氧化镁、正硅酸乙酯，所述制备方法包括以下步骤：步骤1：精确称取高纯氧化铝、氧化钇、氧化铈、氧化镁、正硅酸乙酯的粉末；步骤2：将称取的高纯氧化铝、氧化钇、氧化铈、氧化镁、正硅酸乙酯的粉末放入混料机内充分混合均匀。本发明所制备的YAG陶瓷荧光片透光性能好、高热稳定性、耐候性好，解决传统LED封装呈现的耐候性差、热稳定差、黄化劣化、光密度低等问题。

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