The role of calcination temperature on structural and luminescence behaviour of novel apatite-based Ca2Y 8(SiO4)6O2: Ce3+,Tb3+ phosphors
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Date
2017
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Abstract
A series of novel apatite-based Ca2Y8(SiO4)6O2 phosphors doped with Ce3+ and Tb3+ were synthesized by a solid-state reaction method at different calcination temperatures and times. The comparative results of thermal analysis (TG-DTA), FTIR, X-ray diffraction (XRD) and environmental scanning electron microscope (ESEM) reveal that the firing temperature for Ca 2Y 8 (SiO4)6O2:Ce3+, Tb3+ was optimized to be 1200 °C. The systematic studies on the influences of thermal treatment conditions on photoluminescence (PL) and cathodoluminescence (CL) properties were also reported. The excitation spectra of Ca2Y8(SiO4)6O2:Ce3+, Tb3+exhibited one strong excitation band at 325 nm. The PL and CL results indicated that the violet-blue emission intensities about 400 nm from the Ce3+ and efficient green emission at 544 nm from Tb3+ were highly dependent on the calcination conditions. © 2017 Elsevier Ltd
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Apatite , Calcination , Fourier transform infrared spectroscopy , Light emission , Luminescence , Phosphate minerals , Phosphors , Scanning electron microscopy , Thermoanalysis , X ray diffraction , apatite , cesium , phosphorus , terbium , Ca2Y8(SiO4)6O2 , Calcination conditions , Calcination temperature , Environmental scanning electron microscopes , Excitation spectrum , Solid state reaction method , Treatment conditions , Violet-blue emissions , Article , calcination , cathodoluminescence property , chemical modification , chemical reaction , controlled study , differential thermal analysis , environmental scanning electron microscopy , infrared spectroscopy , luminescence , photoluminescence , physical parameters , priority journal , reaction optimization , reaction time , scanning electron microscopy , solid state reaction , synthesis , temperature sensitivity , thermogravimetry , X ray diffraction , Solid state reactions