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    • 1. 发明申请
    • RARE-EARTH DOPED ALKALINE-EARTH SILICON NITRIDE PHOSPHOR, METHOD FOR PRODUCING AND RADIATION CONVERTING DEVICE COMPRISING SUCH A PHOSPHOR
    • 稀土掺杂的碱土氮化硅磷光体,生产和包含这种磷光体的辐射转换装置的方法
    • WO2009050171A2
    • 2009-04-23
    • PCT/EP2008/063810
    • 2008-10-14
    • LEUCHTSTOFFWERK BREITUNGEN GMBHLEDON LIGHTING JENNERSDORF GMBHDUAN, Cheng-JunHINTZEN, Hubertus TheresiaRÖSLER, SylkeSTARICK, DetlefRÖSLER, SvenDELSING, Anne Charlotte Anoinette
    • DUAN, Cheng-JunHINTZEN, Hubertus TheresiaRÖSLER, SylkeSTARICK, DetlefRÖSLER, SvenDELSING, Anne Charlotte Anoinette
    • C09K11/08C09K11/79C09K11/80
    • C09K11/0883C09K11/773C09K11/7734
    • The invention relates to a method of manufacturing a rare-earth doped alkaline-earth silicon nitride phosphor of a stoichiometric composition. Said method comprising the step of selecting one or more compounds each comprising at least one element of the group comprising the rare-earth elements (RE), the alkaline-earth elements (AE), silicon (Si) and nitrogen (N) and together comprising the necessary elements to form the rare-earth doped alkaline-earth silicon nitride phosphor (AE 2 Si 5 N 8 :RE). The method further comprises the step of bringing the compounds at an elevated temperature in reaction for forming the rare-earth doped alkaline-earth silicon nitride phosphor (AE 2 Si 5 N 8 :RE). In such a method normally a small amount of oxygen, whether intentionally or not-intentionally added, will be incorporated in the rare-earth doped alkaline-earth silicon nitride phosphor (AE 2 Si 5 N 8 :RE). According to the invention the creation of defects by formation of a non-stoichiometric oxygen containing phosphor is at least partly prevented by partly substituting for the ions (AE, Si, N) of the alkaline-earth silicon nitride phosphor (AE 2 Si 5 N 8 :RE) suitable further elements of the periodic system by which vacancies are created, filled or annihilated resulting in the formation of a modified alkaline-earth silicon nitride phosphor (AE 2 Si 5 N 8 :RE) having a stoichiometric composition. In this way a modified phosphor is obtained having excellent and stable optical properties. The invention further relates to a modified phosphor obtainable by the above-mentioned method and a radiation converting device comprising such a phosphor.
    • 本发明涉及制造化学计量组成的稀土掺杂碱土硅氮化物磷光体的方法。 所述方法包括选择一种或多种化合物的步骤,所述化合物各自包含稀土元素(RE),碱土元素(AE),硅(Si)和氮(N)的组中的至少一种元素并且一起 其包含形成稀土掺杂碱土硅氮化物磷光体(AE 2 N 5 N 8:RE)的必要元素。 该方法还包括使化合物在升高的温度下反应以形成稀土掺杂的碱土硅氮化物磷光体(AE 2 Si 5 N 5) 子> 8 :RE)。 在这种方法中,通常少量的氧,无论有意或无意添加,都将被掺入稀土掺杂的碱土硅氮化物磷光体(AE2Si5) /子>名词<子> 8 :RE)。 根据本发明,通过部分地替代碱土硅氮化物磷光体(AE 2,SiO 2)的离子(AE,Si,N)至少部分地防止通过形成非化学计量的含氧磷光体而产生缺陷 低分子量元素:RE)是周期系统的合适的其他元素,通过该元素可以产生空穴,填充或消灭,导致形成修饰的碱 - 其具有化学计量组成的稀土氮化硅磷光体(AE 2 N 5 N 8:RE)。 以这种方式获得具有优异且稳定的光学性质的改性磷光体。 本发明还涉及可通过上述方法获得的改性荧光粉和包含这种荧光粉的辐射转换设备。