Effect of heat-treatment temperature on the luminescent properties of Lu2O3:Eu film prepared by Pechini sol–gel method

2005 ◽  
Vol 243 (1-4) ◽  
pp. 245-250 ◽  
Author(s):  
Hai Guo ◽  
Min Yin ◽  
Ning Dong ◽  
Mei Xu ◽  
Liren Lou ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Heat Treatment Temperature ◽  
Sol Gel ◽  
Luminescent Properties ◽  
Treatment Temperature ◽  
Gel Method ◽  
Sol Gel Method

Preparation of La0.75Sr0.25Cr0.5Mn0.5O3-δ Nanometer Powders by Sol-Gel Method and Research about its Electrochemical Performance

2013 ◽  
Vol 712-715 ◽  
pp. 257-261
Author(s):  
Yin Lin Wu ◽  
Qing Hui Wang ◽  
Ling Wang ◽  
Hai Yan Zhao
Keyword(s):  
Heat Treatment ◽  
Particle Size ◽  
Electrochemical Performance ◽  
Heat Treatment Temperature ◽  
Sol Gel ◽  
Treatment Temperature ◽  
Preparation Process ◽  
Gel Method ◽  
Sol Gel Method ◽  
Ft Ir

The La0.75Sr0.25Cr0.5Mn0.5O3-δnanometer powders were prepared by citric acid sol-gel method.The samples were characterized by DTA, FT-IR, XRD, TEM techniques. The preparation process, morphology of synthesized powders, the best heat-treatment temperature and the electrochemical performance had been studied. The results show that the spherical nanometer powders can be obtained and the best heat-treatment temperature is 800°C. The particle size is about 30nm and Ea is 0.071 eV.

Study on Antireflection of TiO2-SiO2/SiO2 Double-Layer Films Prepared by Sol-Gel Method

2012 ◽  
Vol 591-593 ◽  
pp. 1012-1016 ◽  
Author(s):  
Jing Ying Lu ◽  
Qing Nan Zhao ◽  
Shao Hong Hou ◽  
Yu Hong Dong
Keyword(s):  
Heat Treatment ◽  
Aging Time ◽  
Double Layer ◽  
Heat Treatment Temperature ◽  
Sol Gel ◽  
Treatment Temperature ◽  
Visible Range ◽  
Molar Content ◽  
Gel Method ◽  
Sol Gel Method

TiO2-SiO2 double-layer films are prepared on glass substrates by sol-gel method and dip dipping method. The effect of aging time, heat treatment temperature and molar content of TiO2 for the optical properties of the films have been studied on this paper. And on this basis TiO2-SiO2/SiO2 double-layer films have been prepared as well as the transmittances in the visible range of it have been studied. The results of this paper show that the transmittances of TiO2-SiO2 films in the visible range are reduced with the increasing of sol aging time, molar content of TiO2 and heat treatment temperature; The TiO2-SiO2/SiO2 double-layer films prepared on this basis have antireflective effect, and the average transmittances in the visible range of it are increased nearly 4%-5% more than glass substrate and the transmittance peak reached 100%; the surfaces of the films are smooth; in addition, the cut sides of UV of TiO2-SiO2/SiO2 double-layer films are moved to infrared with the increase of TiO2 content.

Preparation of ZnFe2O4 Nanometer Powders by Sol-Gel Method and Research about its Electrochemical Performance

2013 ◽  
Vol 743 ◽  
pp. 179-182 ◽  
Author(s):  
Yin Lin Wu ◽  
Qing Hui Wang ◽  
Ling Wang ◽  
Hai Yan Zhao
Keyword(s):  
Heat Treatment ◽  
Electrochemical Performance ◽  
Heat Treatment Temperature ◽  
Sol Gel ◽  
Treatment Temperature ◽  
Preparation Process ◽  
Gel Method ◽  
Sol Gel Method ◽  
Ft Ir ◽  
Xrd Techniques

The ZnFe2O4 nanometer powders were prepared by EDTA sol-gel method. The samples were characterized by DTA, FT-IR, XRD techniques. The preparation process, the best heat-treatment temperature and the electrochemical performance had been studied. The results show that the spherical nanometer powders can be obtained and the best heat-treatment temperature is 900°C. The particle size is about 10nm and Ea is 0.88 eV.

Characterization of Zirconia Sizing Nozzle Modifying Addictives Preparated by Sol-Gel Method

2014 ◽  
Vol 1078 ◽  
pp. 31-35
Author(s):  
Liang Zhao ◽  
Qun Hu Xue ◽  
Dong Hai Ding
Keyword(s):  
Heat Treatment ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Heat Treatment Temperature ◽  
Sol Gel ◽  
Treatment Temperature ◽  
Composite Powders ◽  
Gel Method ◽  
X Ray

MgO-Al2O3-ZrO2composite powders with 3 kinds of mass ratio were synthesized by sol–gel method using MgCl2·6H2O, AlCl3·6H2O and ZrOCl2·8H2O as starting materials, and NH3·H2O as a precipitant. The composite powders which match with zirconium oxide particle size and evenly distribute can are advantageous to the formation of metastable t-ZrO2and restrain the grain growth as the additive of modified sizing nozzle. Chemical composition, mineral phase, particle size distribution and micro-morphology of the composite powders were investigated by X-ray fluorescence instrument, X-ray diffractometer, laser particle size analyzer and scanning electron microscope. Research showed that under the process that the concentration of MgCl2solution 0.2 mol/L, AlCl3and ZrOCl2solution concentration 0.5 mol/L, the pH controlled between 10 ~ 11, PEG as the surfactant, drying at 70°C±5°C, heat treatment temperature at 800°C for 3h, particle size distribution of MgO-Al2O3-ZrO2composite powders were: d10= 1.28 μm, d50= 4.65μm, d90= 11.13μm (MgO 10%); d10= 1.15μm, d50= 5.80μm, d90= 15.13μm (MgO 15%);d10= 1.21μm, d50= 6.59μm, d90= 16.87μm (MgO 20%). With the rising of heat treatment temperature, the crystallization degree of composite powders increased, at 800 °C a small amount of t - ZrO2precipitated, meanwhile MgO and Al2O3are still in the amorphous phase. The MgO-A12O3-ZrO2composite powders under this condition have high reactivity and uniform distribution.

Fluorescence property and dissolution site of Er3+ in Ta2O5 film prepared by sol-gel method and dip-coating technique

2004 ◽  
Vol 19 (2) ◽  
pp. 667-675 ◽  
Author(s):  
Noriyuki Wada ◽  
Michiyo Kubo ◽  
Nobuko Maeda ◽  
Maegawa Akira ◽  
Kazuo Kojima
Keyword(s):  
Heat Treatment ◽  
Sol Gel ◽  
Dip Coating ◽  
Treatment Temperature ◽  
Fluorescence Property ◽  
Gel Method ◽  
Sol Gel Method ◽  
Coating Technique ◽  
Ta2o5 Film ◽  
Dip Coating Technique

Ta2O5–xEr2O3 (TE) films were produced by a sol-gel method and a dip-coating technique with heat treatment at 600–1000 °C. Their powders were also prepared from the same sol. The Er3+ fluorescence property of the TE films containing various contents of Er3+ was measured as a function of the heat-treatment temperature. In crystallized films, the Er3+ fluorescence was observed because water-related residues (Ta–OH and H2O) and carbon-related residues (–CH3, –CH2–, –(C ⁼ O)–, and C≡C–H) were removed from the films. It is shown from infrared absorption spectroscopy that Ta–O− and Ta ⁼ O structures dissolve the Er3+ ions selectively and play a role in dispersing the Er3+. The strongest Er3+ fluorescence is observed in the TE film with 2 mol% of Er2O3 because of its highest ability to disperse the Er3+ ions.

Characterization and luminescent properties of SiO2:ZnS:Mn2+ and ZnS:Mn2+ nanophosphors synthesized by a sol–gel method

2009 ◽  
Vol 404 (22) ◽  
pp. 4470-4475 ◽  
Author(s):  
M.M. Biggs ◽  
O.M. Ntwaeaborwa ◽  
J.J. Terblans ◽  
H.C. Swart
Keyword(s):  
Sol Gel ◽  
Luminescent Properties ◽  
Gel Method ◽  
Sol Gel Method

scholarly journals Synthesis and Luminescent Properties of Red Phosphor Na1.8Zn2.1(MoO4)3Eu by Sol-Gel Method

2014 ◽  
Vol 26 (9) ◽  
pp. 2537-2540
Author(s):  
Jianfu Zhang ◽  
Hui Zhang ◽  
Ke Ran Geng ◽  
Zhen Ling Wang
Keyword(s):  
Sol Gel ◽  
Luminescent Properties ◽  
Red Phosphor ◽  
Gel Method ◽  
Sol Gel Method
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