Annealing effects on the microstructure of combustion synthesized Eu3+ and Tb3+ doped Y2O3 nanoparticles
作者： Srirupa T Mukherjee , V Sudarsan , PU Sastry , AK Patra , AK Tyagi
DOI: 10.1016/J.JALLCOM.2011.10.080
关键词: Small-angle X-ray scattering 、 Luminescence 、 Materials science 、 Microstructure 、 Nanoparticle 、 Annealing (metallurgy) 、 Particle size 、 Dopant 、 Scattering 、 Analytical chemistry
摘要: Abstract Eu3+ and Tb3+ doped Y2O3 powders having different Eu3+/Tb3+ concentrations were prepared by gel-combustion process using glycine as fuel (reducing agent) corresponding metal nitrates oxidant, followed annealing at 600 1200 °C. From XRD, SEM TEM studies, it is inferred that for these samples, the extent of aggregation average particle size strongly depends on temperatures. Small angle X-ray scattering (SAXS) studies samples revealed intensity large values momentum transfer vector (Q) vary Q−4, establishing lack surface fractal nature well existence a non-diffusive smooth pore grain interface in both 1200 °C annealed samples. Dopant ions up to 10 at.% do not have any effect particle/pore morphology Improved luminescence from heated sample compared 600 °C has been explained based difference associated area.
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