Study of the annealing temperature effect on the structural and luminescent properties of SrWO4:Eu phosphors prepared by a non-hydrolytic sol–gel process

2012 ◽  
Vol 526 ◽  
pp. 11-21 ◽  
Author(s):  
P.F.S. Pereira ◽  
A.P. de Moura ◽  
I.C. Nogueira ◽  
M.V.S. Lima ◽  
E. Longo ◽  
...  
Keyword(s):  
Temperature Effect ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Luminescent Properties ◽  
Sol Gel Process

Er3+ion concentration and annealing temperature effect on the fluorescence of Er3+:TiO2planar waveguides prepared by the sol-gel process

1995 ◽  
Vol 135 (1-4) ◽  
pp. 149-155 ◽  
Author(s):  
A. Bahtat ◽  
M. Bouazaoui ◽  
M. C. Marcodelucas ◽  
M. Bahtat ◽  
B. Jacquierand ◽  
...  
Keyword(s):  
Temperature Effect ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Ion Concentration ◽  
Sol Gel Process

Effect of Annealing temperature on the Structural and Magnetic Properties of TbxY3-xFe5O12(x = 0.0, 1.0, 2.0) Thin Films Prepared by Sol-Gel Process

2012 ◽  
Vol 501 ◽  
pp. 236-241 ◽  
Author(s):  
Ftema W. Aldbea ◽  
Noor Bahyah Ibrahim ◽  
Mustafa Hj. Abdullah ◽  
Ramadan E. Shaiboub
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Vibrating Sample Magnetometer ◽  
X Ray ◽  
Garnet Phase ◽  
Sol Gel Process ◽  
Amorphous Structures

Thin films nanoparticles TbxY3-xFe5O12 (x=0.0, 1.0, 2.0) were prepared by the sol-gel process followed by annealing process at various annealing temperatures of 700° C, 800° C and 900° C in air for 2 h. The results obtained from X-ray diffractometer (XRD) show that the films annealed below 900°C exhibit peaks of garnet mixed with small amounts of YFeO3 and Fe2O3. Pure garnet phase has been detected in the films annealed at 900°C. Before annealing the films show amorphous structures. The particles sizes measurement using the field emission scanning electron microscope (FE-SEM) showed that the particles sizes increased as the annealing temperature increased. The magnetic properties were measured at room temperature using the vibrating sample magnetometer (VSM). The saturation magnetization (Ms) of the films also increased with the annealing temperature. However, different behavior of coercivity (Hc) has been observed as the annealing temperature was increased.

Luminescent Properties of Zn2SiO4:Eu3+,Dy3+ Phosphors via Sol-Gel Process

2012 ◽  
Vol 217-219 ◽  
pp. 733-736
Author(s):  
Xiu Mei Han ◽  
Shu Ai Hao ◽  
Ying Ling Wang ◽  
Gui Fang Sun ◽  
Xi Wei Qi
Keyword(s):  
Thermal Analysis ◽  
Ir Spectra ◽  
Sol Gel ◽  
Luminescent Properties ◽  
Photoluminescence Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sol Gel Process ◽  
Ft Ir

Zn2SiO4:Eu3+, Dy3+ phosphors have been prepared through the sol-gel process. X-ray diffraction (XRD), thermogravimetric and ddifferential thermal analysis (TG-DTA), FT-IR spectra and photoluminescence spectra were used to characterize the resulting phosphors. The results of XRD indicated that the phosphors crystallized completely at 1000oC. In Zn2SiO4:Eu3+,Dy3+ phosphors, the Eu3+ and Dy3+ show their characteristic red(613nm, 5D0-7F2), blue (481nm, 4F9/2–6H15/2) and yellow (577nm, 4F9/2–6H13/2) emissions.

Degradation of Phenol by Fe3+ Doped Nano-TiO2 Photocatalyst

2013 ◽  
Vol 859 ◽  
pp. 361-364 ◽  
Author(s):  
Jing Wang ◽  
Du Shu Huang ◽  
Wei Liu ◽  
Qing Shan Pan ◽  
Yong Min
Keyword(s):  
Degradation Rate ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Phenol Degradation ◽  
Nano Tio2 ◽  
Phenol Solution ◽  
Sol Gel Process ◽  
Two Peaks ◽  
Degradation Properties ◽  
Better Than

Degradation properties of phenol using nano-TiO2 as photocatalyst in aqueous solution were investigated. The effect of annealing temperature and ionic modification on the degradation was studied. The results showed that, 500 °C annealed TiO2 was better than 700 °C annealed. Photocatalyst nano-TiO2 material doped with Fe3+ was prepared quickly by sol-gel process and was used as photocatalyst to degrade phenol solution of 100mg/L under UV irradiation for 3 hours. UV spectrophotometer testing was made and found that two peaks at 210 nm and 270 nm were significantly become low, indicating that the phenol has been degraded. The phenol degradation rate was 94.18%.

Luminescent properties of Gd2Ti2O7: Eu3+ phosphor films prepared by sol–gel process

2004 ◽  
Vol 39 (11) ◽  
pp. 1607-1614 ◽  
Author(s):  
M.L. Pang ◽  
J. Lin ◽  
J. Fu ◽  
Z.Y. Cheng
Keyword(s):  
Sol Gel ◽  
Luminescent Properties ◽  
Sol Gel Process

Synthesis and Characterization of SiO2@Y2MoO6:Eu3+ Core–Shell Structured Spherical Phosphors by Sol–Gel Process

2016 ◽  
Vol 16 (4) ◽  
pp. 3914-3920 ◽  
Author(s):  
G. Z Li ◽  
F. H Liu ◽  
Z. S Chu ◽  
D. M Wu ◽  
L. B Yang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Annealing Temperature ◽  
Uv Light ◽  
Sol Gel ◽  
Spherical Shape ◽  
Core Shell ◽  
X Ray ◽  
Transmission Electron ◽  
Sol Gel Process ◽  
Average Size

SiO2@Y2MoO6:Eu3+ core–shell phosphors were prepared by the sol–gel process. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectra (EDS), transmission electron microscopy (TEM), photoluminescence (PL) spectra as well as kinetic decays were used to characterize the resulting SiO2@Y2MoO6:Eu3+ core–shell phosphors. The XRD results demonstrated that the Y2MoO6:Eu3+ layers on the SiO2 spheres crystallized after being annealed at 700 °C and the crystallinity increased with raising the annealing temperature. The obtained core–shell phosphors have spherical shape with narrow size distribution (average size ca. 640 nm), non-agglomeration, and smooth surface. The thickness of the Y2MoO6:Eu3+ shells on the SiO2 cores could be easily tailored by varying the number of deposition cycles (70 nm for four deposition cycles). The Eu3+ shows a strong PL emission (dominated by 5D0–7F2 red emission at 614 nm) under the excitation of 347 nm UV light. The PL intensity of Eu3+ increases with increasing the annealing temperature and the number of coating cycles.

Synthesis, Structure and Spectral Properties of Eu:YGO Phosphor Powders

2016 ◽  
Vol 852 ◽  
pp. 585-590
Author(s):  
Lin Sang ◽  
Ning Pan ◽  
Jing Su ◽  
Xiao Mei Tan ◽  
Hang Li ◽  
...  
Keyword(s):  
Spectral Properties ◽  
Sol Gel ◽  
Luminescent Properties ◽  
Photoluminescence Spectroscopy ◽  
Fluorescence Properties ◽  
Sol Gel Process ◽  
Different Temperatures ◽  
Ft Ir ◽  
Polycrystalline Phase ◽  
Precursor Powders

3at. % Eu3+ doped (Y, Gd)2O3 precursor powders with various compositions were synthesized via a sol-gel process, and the precursors were sintered at different temperatures. XRD, FT-IR, Raman and photoluminescence spectroscopy were used to study the phase, microstructure and luminescent properties of the precursors and the sintered powders. The results show that pure (Y, Gd)2O3 polycrystalline phase can be obtained from sintering the precursors at 700°C. The influences of the host compositions on the microstructures and fluorescence properties were analyzed, and the optimized composition was obtained for 3at. % Eu3+ doped (Y, Gd)2O3 powders.

Photoluminescence Characteristics of Sol–Gel Derived ZnTiO3 Doped with Ni2+ Ion

2013 ◽  
Vol 544 ◽  
pp. 360-363 ◽  
Author(s):  
You Hua Yu ◽  
Meng Xia ◽  
Li Li Liu ◽  
Wei Jie Wu
Keyword(s):  
Sol Gel ◽  
Luminescent Properties ◽  
Host Lattice ◽  
Deionized Water ◽  
Luminescence Spectra ◽  
X Ray Diffraction ◽  
Spectra Analysis ◽  
X Ray ◽  
Water As Solvent ◽  
Sol Gel Process

ZnTiO3 doped with Ni 2+ ion has been prepared at a relatively low temperature of 600°C from the precursor derived from sol-gel process using deionized water as solvent. X-ray diffraction analysis indicates that the doped samples exhibit a hexagonal ZnTiO3 structure. From the luminescence spectra analysis, the introduction of Ni2+ ions into ZnTiO3 results in novel luminescent properties. And the relative intensity of the bands varies with the concentration of Ni2+ ions. It is demonstrated that the Ni2+ ion has taken the place of Zn2+ ion in the host lattice of ZnTiO3.

Investigation of Annealing Effect on the Electrical and Optical Properties of ITO Film Prepared by Sol-Gel Process

2011 ◽  
Vol 84-85 ◽  
pp. 431-435
Author(s):  
Jing Li ◽  
Xiao Dong Zhao
Keyword(s):  
Annealing Temperature ◽  
Sol Gel ◽  
Visible Spectrum ◽  
Annealing Effect ◽  
Oxide Thin Film ◽  
Electrical And Optical Properties ◽  
Ito Film ◽  
Rapid Annealing ◽  
Sol Gel Process ◽  
Ito Films

Indium tin oxide thin film (ITO film) has been deposited onto the quartz glass by a sol-gel process, followed by annealing in air. The temperature range from 200 to 800 °C and the annealing effect on the optical, electrical and structural properties of ITO films has been studied in detail. ITO Films with a thickness of 100nm had an optical transparency up to 90% in the wavelength range of visible spectrum. The ITO film showed minimum resistivity of 1.65×10-3Ω.cm-1 when annealing temperature was 600°C in air. the rapid annealing process may contribute to the electrical property of ITO film for the densification of the micro structure. but the process may lead to the decrease of transparency for the reflection caused by grain boundary.

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