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Preparation and Luminescent Properties of a coated BaMgAl10O17:Eu2+ phosphor

등록일
2005년 2월 17일 16시 59분 54초
접수번호
1055
발표코드
26P293포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
토 <발표Ⅲ>
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
이대원, 부진효, 정하균1
성균관대학교 화학과,
1한국화학연구원 화학소재연구부,
In general, it is known that BaMgAl10O17:Eu2+ phosphor particles obtained by spray pyrolysis are hollow. In the present work, the dense BaMgAl10O17:Eu2+ phosphor particles with a spherical shape have been synthesized through spray pyrolysis method using basic aluminum nitrate precursor as a spray solution. However, thermal stability of the BAM:Eu blue phosphor is very poor due to the oxidation Eu2+ to Eu3+ during the thermal process, so brightness of the phosphor decreases. To improve the thermal stability of the dense BAM:Eu phosphor, the spherical BAM:Eu particles were coated with pure BaMgAl10O17 layer using the hydrolysis reaction in a solution system. The synthesized powders were characterized by XRD, SEM, PL and TEM. The brightness of the coated phosphor was higher than that of the uncoated phosphor. Also, the coating thickness of BAM layer on the BAM:Eu particles was optimized.

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