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    • 4. 发明授权
    • 청색 발광 형광체 및 그 제조방법
    • 청색발광형광체및그제조방법
    • KR100726973B1
    • 2007-06-14
    • KR1020060018686
    • 2006-02-27
    • 한밭대학교 산학협력단
    • 박인용
    • C09K11/71C09K11/61
    • A calcium halo phosphate-based blue light-emitting phosphor for long-wavelength ultraviolet rays is provided to exhibit a high absorption peak in the ultraviolet region from 300 to 410nm and have excellent luminous brightness. The calcium halo phosphate-based blue light-emitting phosphor for long-wavelength ultraviolet rays is prepared by the steps of: dissolving a calcium compound and a europium compound in distilled water to make a calcium/europium aqueous solution; dissolving a phosphorous compound selected from ammonium phosphate, diammonium hydrogen phosphate, or ammonium dihydrogen phosphate in distilled water to make a phosphorous aqueous solution; reacting the calcium/europium aqueous solution with the phosphorous aqueous solution in a molar ratio of the sum of calcium-europium and phosphorous of 1.8-2.6 to obtain precipitates, followed by obtaining powder by heating the precipitate-containing aqueous solution to evaporate water or freeze-drying the precipitate-containing aqueous solution; heat-treating the powder under a reducing atmosphere at 800-1000°C for 1-5 hours; and washing the heat-treated powder with distilled water to obtain a calcium halo phosphate-based blue light-emitting phosphor represented by a formula 1 which is Ca2-xPO4Cl:Eux^2+, wherein x is more than 0, and less than or equal to 0.20.
    • 提供用于长波长紫外线的基于卤磷酸钙的蓝光发光磷光体,以在300-410nm的紫外区域中表现出高吸收峰,并且具有优异的发光亮度。 用于长波长紫外线的卤磷酸钙蓝光发射荧光粉通过以下步骤制备:将钙化合物和铕化合物溶解在蒸馏水中以制备钙/铕水溶液; 将选自磷酸铵,磷酸氢二铵或磷酸二氢铵的磷化合物溶解在蒸馏水中以制备磷水溶液; 使钙/铕水溶液与磷水溶液以钙 - 铕和磷的总和的摩尔比为1.8-2.6反应以获得沉淀物,随后通过加热含沉淀物的水溶液以蒸发水或冷冻而获得粉末 - 干燥含有沉淀物的水溶液; 在800-1000℃的还原气氛下对粉末进行热处理1-5小时; 然后用蒸馏水洗涤经过热处理的粉末,得到式1所示的Ca2-xPO4Cl:Eux ^ 2 +表示的卤代磷酸钙类蓝色发光荧光体,其中x大于0且小于或等于 等于0.20。