公开(公告)号：US08551360B2

公开(公告)日：2013-10-08

申请号：US12738213

申请日：2008-10-14

申请人： Cheng-Jun Duan ,  Hubertus Theresia Hitzen ,  Sylke Rösler ,  Detlef Starick ,  Sven Rösler ,  Anne Charlotte Antoinette Delsing

发明人： Cheng-Jun Duan ,  Hubertus Theresia Hitzen ,  Sylke Rösler ,  Detlef Starick ,  Sven Rösler ,  Anne Charlotte Antoinette Delsing

IPC分类号： C09K11/08 ,  C09K11/66 ,  C09K11/02 ,  C09K11/77

CPC分类号： C09K11/0883 ,  C09K11/773 ,  C09K11/7734

摘要： 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 (AE2Si5N8: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 (AE2Si5N8: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 (AE2Si5N8: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 (AE2Si5N8: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 (AE2Si5N8: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.

摘要翻译： 本发明涉及一种制备化学计量组成的稀土掺杂碱土金属氮化硅荧光体的方法。 所述方法包括选择一种或多种化合物的步骤，每种化合物包含稀土元素（RE），碱土元素（AE），硅（Si）和氮（N）的组中的至少一种元素并在一起 包括形成稀土掺杂的碱土金属氮化硅荧光体（AE2Si5N8：RE）所必需的元素。 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金属氮化硅荧光体（AE2Si5N8：RE）的步骤。 在这种方法中，通常将少量的氧，无论有意或没有有意添加，都将被掺入稀土掺杂的碱土金属氮化硅荧光体（AE2Si5N8：RE）中。 根据本发明，通过部分代替碱土金属氮化硅荧光体（AE2Si5N8：RE）中的离子（AE2Si5N8：RE），至少部分地替代了通过形成非化学计量的含氧荧光体来产生缺陷， 产生空位的周期性系统的另外的元素，填充或消除，导致形成具有化学计量组成的改性碱土金属氮化硅荧光体（AE2Si5N8：RE）。 以这种方式获得具有优异且稳定的光学性质的改性荧光体。 本发明还涉及通过上述方法获得的改性荧光体和包含这种荧光体的辐射转换装置。