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    • 10. 发明申请
    • METHOD FOR PRODUCING ZINC SULFIDE BASED PHOSPHOR
    • 生产基于硫化锌的磷光体的方法
    • US20110147663A1
    • 2011-06-23
    • US13057168
    • 2009-07-30
    • Yoshihisa TsujiKazuma InoueJun TakaiHideharu Iwasaki
    • Yoshihisa TsujiKazuma InoueJun TakaiHideharu Iwasaki
    • C09K11/56
    • C09K11/625C09K11/876H05B33/14
    • The present invention provides a method for producing a zinc sulfide based phosphor by firing a zinc sulfide based phosphor precursor, comprising at least: a first firing step of firing a mixture containing a zinc sulfide based phosphor precursor, sulfur, and a chlorine-containing flux; and a second firing step of further firing the fired product obtained from the first firing step, wherein the first firing step comprises: heating the mixture in an atmosphere wherein an air stream is introduced so that a temperature of the mixture is increased from normal temperature to a transformation temperature at which a crystal system of the phosphor precursor is transformed; when a temperature of the mixture is increased above the transformation temperature, switching the atmosphere to a nitrogen atmosphere and continuing the heating of the mixture; and when the temperature of the mixture reaches a temperature in a range of 1000° C. to 1200° C., inclusive, maintaining the temperature of the mixture at a constant level and thereafter rapidly quenching the mixture and washing the mixture to obtain a fired product; and wherein the second firing step comprises heating in the nitrogen atmosphere the fired product obtained from the first firing step so that the temperature of the fired product is increased from normal temperature to a temperature in a range of 650° C. to 1000° C., inclusive; and when a temperature of the fired product reaches the temperature in the range of 650° C. to 1000° C., inclusive, introducing oxygen while maintaining the temperature of the fired product and thereafter rapidly quenching the fired product and washing the fired product to obtain a zinc sulfide based phosphor. Use of the method of the present invention makes it possible to provide a zinc sulfide based phosphor material suitable for use in the production of an EL device that shows high brightness.
    • 本发明提供了一种通过焙烧硫化锌系荧光体前体来制造硫化锌系荧光体的方法,该方法至少包括:将含有硫化锌系荧光体前体,硫和含氯助熔剂的混合物进行烧成的第一烧成工序 ; 以及第二烧成工序,对从所述第一烧成工序得到的烧成品进一步进行烧成,其中,所述第一烧成工序包括:在导入空气流的气氛中加热所述混合物,使得所述混合物的温度从常温升高到 改变荧光体前体的晶体体系的相变温度; 当混合物的温度升高到转化温度以上时,将气氛切换至氮气氛并继续加热混合物; 并且当混合物的温度达到1000℃至1200℃的范围内的温度时,将混合物的温度保持在恒定水平,然后快速骤冷混合物并洗涤该混合物以获得烧制 产品; 并且其中所述第二烧制步骤包括在所述氮气气氛中加热从所述第一烧制步骤获得的烧制产品,使得所述烧制产品的温度从常温升高至650℃至1000℃的温度。 , 包括的; 并且当烧制品的温度达到650℃至1000℃的温度时,在保持烧制产品的温度的同时引入氧气,然后迅速骤冷烧制产品并将烧制产品洗涤至 得到硫化锌系荧光体。 通过使用本发明的方法,可以提供一种适用于制造高亮度的EL器件的硫化锌系荧光体材料。