期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 633, 期 -, 页码 97-103出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.01.069
关键词
Nitride phosphor; CaAlSiN3:Eu2+; Metal hydride; Direct-nitriding
资金
- Japan Society for the Promotion of Science (JSPS) [25.0656]
- Grants-in-Aid for Scientific Research [13J00656] Funding Source: KAKEN
Nitride phosphor, CaAlSiN3:Eu2+, was efficiently synthesized without any impurity phase by the direct-nitriding method using metal hydride fine powders of (Ca0.97Eu0.03) AlSiHx and/or CaH2 in a particle size range below 20 mu m as starting materials under atmospheric pressure heating conditions in a stream of N-2 gas. High-quality powders of CaAlSiN3:Eu2+(3 at%) phosphor were obtained from such metal hydride powder mixed with a large excess amount of CaH2 powder (> 30 wt%) as a flux and gave an intense red emission band peaking at 650 nm under the excitation of 450 nm, of which the relative integrated emission intensity was about 110% versus that of a commercially-available YAG:Ce3+ (P46-Y3) standard phosphor. Also, the thermal quenching effect was as low as the CaAlSiN3:Eu2+ phosphors prepared by the other methods (- 6% at 150 degrees C), so that this direct-nitriding method was noted as one of excellent procedures to produce the high-quality nitride phosphors for white-LED illumination lamps. (C) 2015 Elsevier B.V. All rights reserved.
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