公开(公告)号：US20130284975A1

公开(公告)日：2013-10-31

申请号：US13863672

申请日：2013-04-16

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Sunjin KIM ,  Kyoungja WOO ,  Sohye CHO ,  Yumi NA ,  Jongku PARK

IPC: C09K11/77

CPC classification number: C09K11/7734 ,  C09K11/7706 ,  C09K11/7774

Abstract: The present disclosure relates to a method for preparing a silicate phosphor and the silicate phosphor. The method includes (1) a hydrothermal treatment step of obtaining a layered silicate substituted with a rare-earth metal by hydrothermally treating an aqueous solution as a reaction solution, the solution containing rare-earth metal ions, NaOH and silica, and (2) a calcinating step of forming a crystalline silicate by calcinating the layered silicate substituted with the rare-earth metal. According to the method for preparing the silicate phosphor, the silicate phosphors, which can be used as phosphors for LEDs in the aspects of high covalent character, high luminescent intensity and stability at high temperature, may be prepared by a simplified, economic process. Also, the silicate phosphors may selectively emit red, green or blue light by virtue of the substitution of a silicon position with rare-earth metals of various types.

Abstract translation: 本公开涉及一种制备硅酸盐荧光体和硅酸盐荧光体的方法。 该方法包括：（1）水热处理步骤，通过水热处理作为反应溶液的水溶液获得由稀土金属取代的层状硅酸盐，所述溶液含有稀土金属离子，NaOH和二氧化硅，和（2） 通过煅烧由稀土金属取代的层状硅酸盐形成结晶硅酸盐的煅烧步骤。 根据制备硅酸盐荧光体的方法，可以通过简化的经济方法制备可在高共价特性，高发光强度和高温下的稳定性方面用作LED的荧光体的硅酸盐荧光体。 此外，硅酸盐荧光体可以通过用各种类型的稀土金属代替硅位置来选择性地发射红色，绿色或蓝色光。