SrAl2O4 : Eu, Dy nanometer phosphors synthesized by combustion method
writer：Qiu, GM(*)，Sun, YB，Zhang, SQ，Zhang, M，Yan, CH，Dai, SJ
keywords：luminescence；strontium aluminate；combustion synthesis；nanometer phosphors；rare earths
source：期刊
specific source：Journal of Rare Earths
Issue time：2004年
SrAl2 04：Eu，Dy nanometer phosphors were synthesized by combustion method at 500—900℃，followed by
heating the combustion sample at 1 150℃at a weak reductive atmosphere and nanometer phosphor with much better lu—
minescent properties was obtained．The influences of t11e initiating combustion temperature，H1 BO，quantity，the mass
ratio of urea and nitrate on the luminescent intensity of nanometer phosphors were studied．T11e optimum synthetic COD—
ditions were determined．The analysis results by transmission electron microscopy(TEM)indicate that the particle size
of the synthetic product is less than 75 nnl．The luminescent materials do not need to be ground．Their coating can be
refined．It supplies a new approach to the rapid preparation of the luminescent materials at low temperature．The excita—
tion and emission spectra indicate that the main peaks in the excitation and emission spectrum of nanometer phosphor
synthesized by combustion method shifted to the short wavelength compared with the phosphor obtained by the solid—
state reaction synthesis method．The reason of blue shift was explained．The afterglow decay results indicate that the de—
cay speed of the afterglow for nanometer phosphor is faster than that obtained by the solid—state reaction method．