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YAG yellow luminescence comprising lithium for white LED and manufacturing method thereof
YAG yellow luminescence comprising lithium for white LED and manufacturing method thereof
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机译:用于白光led的包含锂的yag黄色发光体及其制造方法
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摘要
PURPOSE: Provided are a yellow phosphor of yttrium aluminate which has excellent luminance under excited state of blue light source generated from blue emitting diode, and which is suitable for white light emitting diode, and a method for producing the same. CONSTITUTION: The yellow phosphor of yttrium aluminate is represented by formula: (Y1-a-bCeaLib)3Al5O12(wherein 0.005=a=0.02, 0.01=b=0.025). The method comprises the steps of (i) adding cerium oxide(CeO2) and lithium carbonate(Li2CO3) to yttrium aluminate which is a matrix, so that 0.005=a=0.02, 0.01=b=0.025 in the formula; (ii) drying the mixture and precalcining the dried mixture in atmosphere at 1,200 deg.C; (iii) cooling the precalcined product, and heat treating the cooled product at temperature of 1650 deg.C or more; and (iv) milling the treated product.
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机译:目的:提供铝酸钇的黄色荧光体及其制造方法,所述铝荧光体的黄色荧光体在由蓝色发光二极管产生的蓝色光源的激发态下具有优异的亮度,并且适用于白色发光二极管。组成:铝酸钇的黄色荧光粉由下式表示:(Y1-a-bCeaLib)3Al5O12(其中0.005 <= a <= 0.02,0.01 <= b <= 0.025)。该方法包括以下步骤:(i)将氧化铈(CeO 2)和碳酸锂(Li 2 CO 3)添加到作为基质的铝酸钇中,使得式中0.005≤a≤0.02,0.01≤b≤0.025; (ii)干燥混合物并在1200℃的气氛中将干燥的混合物预煅烧; (iii)冷却该预煅烧产物,并在1650℃或更高的温度下对冷却的产物进行热处理; (iv)研磨处理过的产品。
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