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6 articles for “sol–gel”
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Synthesis by Sol–Gel Method and Characterization of CaAlO: Mn, Dy Nanoparticles
Abstract: Dy and Mn doped Calcium Aluminate nanoparticles were synthesized by using Sol-gel method. Heat treated material was characterized by X-ray diffraction(XRD), optical study of photoluminescence (PL) emission spectra, morphological study of scanning electron microscopy (SEM) combined with X-ray analysis. The Dy and Mn doped phosphor exhibits emission at the excitation of the material with 380 nm wavelength generates a strong emission at 480 nm. Besides this, subsidiary maxima at 417, …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 4, Issue 2, 2014 · pp. 23–27 Read article
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Synthesis and Characterization of Terbium Doped Strontium Aluminate Nanophosphor
Abstract: Luminescence investigations of Tb activated strontium aluminate phosphors prepared using the sol-gel method are described. The phosphor has been characterized by powder X-ray diffraction scanning electron microscope. Optical properties were studied by photoluminescence spectra. Photoluminescence studies of the prepared phosphors showed prominent IR emission, apart from near-band edge emission and green emission. Keywords: SrAl4O7, nanomaterial, sol-gel, photoluminescence, X-ray powder diffraction Cite this Article Jisha VT, Suresh G. Synthesis and Characterization …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 6, Issue 2, 2016 · pp. 25–28 Read article
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A Simple Sol–Gel Route for the Synthesis and Characterization of Tm-Doped CaAl2O4 Nanophosphor
Abstract: Calcium Aluminate nanophosphor doped with Thulium (CaAl2O4: Tm) was synthesized by simple sol–gel route. The obtained nanophosphor was characterized by X-ray diffraction technique (XRD). The surface morphology was determined by scanning electron microscopy (SEM). Also photoluminescence spectra (PL), and thermogravimetric analysis/differential scanning calorimetry (TGA/DSC) characterization were done. The XRD revealed the formation of monoclinic structure and the particle size was determined by Scherrer formula. It showed that the particles were …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 6, Issue 1, 2016 · pp. 6–10 Read article
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Sol–Gel Synthesis of SrAl4O7 and Defect-Related Luminescence Properties
Abstract: Single phase of monoclinic SrAl4O7 is synthesized by sol–gel process at a markedly lower temperature as compared to conventional solid-state reaction. The sol–gel derived samples were characterized by thermal gravimetric analysis (TGA), X-ray powder diffraction (XRD) analysis, scanning electron microscope (SEM) and spectrofluorometer. The XRD analysis shows that the strontium aluminate has the monoclinic (α-SrA2) structure. It was demonstrated that the PL emission was obtained at 395 nm, 510 nm …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 5, Issue 2, 2015 · pp. 16–19 Read article
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Effect of Sintering Temperature on Dielectric Behavior of Y0.95Ca0.05MnO3 Manganites
Abstract: Ca-doped mixed valent Y0.95Ca0.05MnO3 (YCMO) manganites, synthesized using cost effective acetic acid based modified sol-gel method, sintered at various temperatures, exhibit a strong effect of sintering temperature on the structure, microstructure, dielectric and activation energy (Ea). Oxygen vacancies, located at the grain boundaries of the nanostructured YCMO samples, play an important role in governing the dielectric behavior. The peak behavior, observed in imaginary part of dielectric (εʹʹ vs. T) plots, …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 3, Issue 2, 2013 · pp. 24–29 Read article
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A Comparative Study of Structure, Morphology and Optical Properties of CaAl2O4 Phosphors by Sol–Gel Method
Abstract: In this paper, monoclinic CaAl2O4 phosphor with different weight percentage of aluminium was synthesized by low temperature sol–gel method. The prepared samples were characterized by X-ray diffraction (XRD) analysis, Fourier transform infra red (FTIR), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and photoluminescence emission spectra (PL). The XRD analysis showed that CaAl2O4 have monoclinic structure. The average size of the particles lies between 88 and 109 nm. It was …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 5, Issue 3, 2015 · pp. 1–10 Read article