XRD patterns of undoped YAG powders sintered at (a) and (b) for 4 h, (c) , and (d) powders heated at for 4 h. Patterns are compared with the YAG ASTM file 33-0040 represented in dotted lines.
(a) Temperature dependence of mean crystallite diameters for powders; (b) SEM micrograph recorded at magnification from annealed at for 4h.
Room temperature excitation spectra of crystallized powders [(a) and (b) ] in VUV range monitored at 544 nm.
Room temperature emission spectra of crystallized powders [(a) and (b) ] and (c) concentration dependence of emission intensity of transition upon 180 nm excitation.
Room temperature excitation spectra of crystallized powders [(a) and (b) ] in VUV range monitored at 559.5 nm.
Emission spectra of crystallized powders recorded upon 173 nm excitation at (a) room temperature and (b) 8.2 K (solid line) associated with corresponding fitted Gaussian curves (dot lines).
Concentration dependence of emission intensity of transitions upon 173 nm excitation.
(Color online) Luminescence decay traces of the emissions of in at (a) RT and (b), (c) 8.2 K upon 173 nm excitation associated with corresponding fitted double exponential curves (dashed lines).
Room temperature excitation and emission spectra of crystallized (a) , (b) , and (c) , powders.
Parameters describing the Gaussian fit of the emissions of in recorded at 8.2 K.
Parameters describing shape of decay traces of the emissions of in fitting by a double exponential curve.
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