作　　者： ; ; ;

机构地区： 天津大学材料科学与工程学院

出　　处： 《材料导报》 2005年第F05期347-349,共3页

摘　　要： 概括了SrAl2O4：Eu^2＋,Dy^3＋在加硼和不加硼条件下的合成和性能对比，阐述了硼掺杂对Eu^2＋，Dy^3＋共激活SrAl2O4的影响及作用：一方面，硼作为助熔剂可以降低烧成温度促使单斜SrAl2O4相的形成；另一方面，硼掺杂能促进Eu^3＋的还原以及Eu离子在SrAl2O4体系中的扩散和取代并促使发光中心的形成和稳定，从而使得材料的发光性能有所改善。此外，硼掺杂也引入了一些问题，如粉体烧结等，也对此做了概括并提出了展望。 Differences of synthesis and properties of SrAl2O4 ： Eu^2 ＋ , Dy^3 ＋ with boron addition and without boron are summarized in this paper. The advantages of boron in SrAl2O4 system is expounded. To begin with,boron as a flux decreases clearly the reaction threshold temperature and is propitious to the formation of monoclinie SrAl2O4. Moreover, boron accelerates the diffusion of Eu and the substituent of Eu→Sr,promotes the reduetive process of Eu^3＋→Eu^2＋, and facilitates the forming and stabilizing of trap center. Boron addition, however, has its own disadvantages such as powder agglomeration. Both sides of boron addition are compared and expectations are proposed.

关 键 词： 硼掺杂 铝酸锶 长余辉

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