Luminescent terbium doped yttrium aluminum garnet (YAG∶Tb) powders were prepared using yttrium and aluminum oxide precursor particles produced by combustion process with glycine. Heat treatment of the resulting precu...Luminescent terbium doped yttrium aluminum garnet (YAG∶Tb) powders were prepared using yttrium and aluminum oxide precursor particles produced by combustion process with glycine. Heat treatment of the resulting precursor powders at 950℃or 1450℃for 2h, yielded pure YAG particles. The morphology of YAG∶Yb phosphor after sintering at 1450℃appeared to be spherical or elliptical and the grain size of the phosphor was in the range of 0.6 to 1.4μm. From the photoluminescence spectra, transitions 5D4 7FJ corresponding to Tb3+in YAG matrices were identified. The prominent transition 5D4 7F6 emission for YAG∶0.05Tb phosphor after sintering at 1450℃was very significant to improve the chromaticity of YAG∶Tb phosphor.展开更多
文摘Luminescent terbium doped yttrium aluminum garnet (YAG∶Tb) powders were prepared using yttrium and aluminum oxide precursor particles produced by combustion process with glycine. Heat treatment of the resulting precursor powders at 950℃or 1450℃for 2h, yielded pure YAG particles. The morphology of YAG∶Yb phosphor after sintering at 1450℃appeared to be spherical or elliptical and the grain size of the phosphor was in the range of 0.6 to 1.4μm. From the photoluminescence spectra, transitions 5D4 7FJ corresponding to Tb3+in YAG matrices were identified. The prominent transition 5D4 7F6 emission for YAG∶0.05Tb phosphor after sintering at 1450℃was very significant to improve the chromaticity of YAG∶Tb phosphor.
