Abstract
Powder phosphor yttrium aluminum garnet (YAG), doped with trivalent cerium (Ce3+), is synthesized by using the solid state reaction method. The formation of YAG and YAG:Ce (cerium-doped yttrium aluminum garnet) was investigated by means of X-ray diffraction (XRD) which shows that the powder is a single phase constituted of grains with sizes of about 70nm. From the photoluminescence spectra, it was confirmed that the synthesized YAG:Ce3+ phosphor emits typical yellow light peaked at around 550nm under an excitation of 473nm-wavelength. By using the Photo-Thermal Deflection (PTD) technique, heat transfer modes are studied and, thermal conductivity, thermal diffusivity, specific heat and mean free path are determined and obtained respectively in the order of 12Wm−1K−1, 2m2s−1, 800Jmol−1 and 7.5A°, which are in good agreement with literature.
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