Single-Step Solid-State Synthesis of CeMgAl11O19:Tb Phosphor

Bulletin of the Korean chemical society

Byoung-Kyu Park¹  Song-Ho Byeon¹  Jun-Kun Kang¹  Seoung-Soo Lee¹ 

关键词: CMAT;    Phosphor;    Aluminate;    Single-step;    Self-flux;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The green-emitting CeMgAl₁₁O₁₉:Tb (CMAT) phosphor has been prepared at 1200 ∑C by the simple solid-state reaction using AlF₃ as a self-flux. This preparation temperature is much lower than those (1500-1700 ∑C) for conventional solid-state reaction and spray pyrolysis method. In particular, the complete process to produce high-quality phosphor particles was carried out through the single-step heat treatment of the mixture of corresponding oxide-type metal sources. An addition of AlF₃ as a self-flux significantly decreased the crystallization temperature of CMAT with plate-like shape. The particle morphology could be controlled from plate-like to spherical by using H₃BO₃ as an additional flux. Thus, an optimal morphology and luminescence characteristics of CMAT were achieved when both AlF₃ and H₃BO₃ fluxes were simultaneously used. Compared with conventional solid-state process, which is accompanied by the calcination step(s), and other alternative liquid solution techniques such as sol-gel method and spray pyrolysis, no use of active precursors and liquid media that are harmful to the environment is a distinctive advantage for the industrial purpose.

【 授权许可】

Unknown