고상법을 이용한 Y3Al5O12:Ce3+ 의 제조에서 BaF2가 미치는 영향

원형석; Nersisyan Hayk; 원창환; 원형일; Hyung Seok Won; Nersisyan Hayk; Chang Whan Won; Hyung Il Won

Korean Journal of Materials Research, Vol.21, No.11, 604-610, November, 2011

DOI10.3740/MRSK.2011.21.11.604 Export Citation

고상법을 이용한 Y3Al5O12:Ce3+ 의 제조에서 BaF2가 미치는 영향

Effect of BaF2 as a Flux in Solid State Synthesis of Y3Al5O12:Ce3+

원형석, Nersisyan Hayk, 원창환^†, 원형일

충남대학교 공과대학 나노신소재공학과, 대전광역시 유성구 충남대학교 공과대학 나노신소재공학과 305-764

Hyung Seok Won, Nersisyan Hayk, Chang Whan Won^†, and Hyung Il Won

Department of nano materials, Chungnam National University, Gungdong Yusung Daejeon Korea

E-mail:

The effect of BaF2 flux in Y3Al5O12:Ce3+(YAG:Ce) formation was investigated. Phase transformation of Y3Al5O12(YAG) was characterized by using XRD, SEM, and TEM-EDS, and it was revealed that the sequential formation of the Y4Al2O9(YAM), YAlO3(YAP) and Y3Al5O12(YAG) in the temperature range of 1000-1500oC. Single phase of YAG was revealed from 1300oC. In order to find out the effect of BaF2 flux, three modeling experiments between starting materials (1.5Al2O3. 2.5Y2O3, Y2O3. BaF2, and Al2O3. BaF2) were done. These modeling experiments showed that the nucleation process occurs via the dissolution-precipitation mechanism, whereas the grain growth process is controlled via the liquid-phase diffusion route. YAG:Ce phosphor particles prepared using a proposed technique exhibit a spherical shape, high crystallinity, and an emission intensity. According to the experimental results conducted in this investigation, 5% of BaF2 was the best concentration for physical, chemical and optical properties of Y3Al5O12:Ce3+(YAG:Ce) that is approximately 10-15% greater than that of commercial phosphor powder.

Keywords:Y3Al5O12:Ce2+;barium fluoride;flux;particle shape

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