Effect of corona discharge on the stability of the adhesion of thin silicone-organic coating to polyamide fiber surface made by the sol–gel method

2017 ◽  
Vol 14 (5) ◽  
pp. 1115-1125 ◽  
Author(s):  
Dorota Kowalczyk ◽  
Irena Kamińska
Keyword(s):  
Corona Discharge ◽  
Sol Gel ◽  
Fiber Surface ◽  
Organic Coating ◽  
Gel Method ◽  
Sol Gel Method ◽  
Polyamide Fiber ◽  
The Stability

Effects of Catalyst on the Transmittance and Stability of SiO2 Antireflective Film Prepared by Sol-Gel Method

2013 ◽  
Vol 834-836 ◽  
pp. 462-465
Author(s):  
Kun Peng ◽  
E. Chen ◽  
Ling Ping Zhou ◽  
Jia Jun Zhu ◽  
De Yi Li
Keyword(s):  
Raw Materials ◽  
Salt Spray ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Antireflective Film ◽  
Average Transmittance ◽  
Acid Catalyzed ◽  
The Stability ◽  
Better Than

SiO2 antireflective films were prepared by sol-gel method with TEOS as the raw materials and acid or ammonia as catalyst. The effects of different catalysts on the transmittance and the stability of film were investigated. The prepared base catalyzed SiO2 film has better antireflective effects than that of film acid catalyzed film, but the corrosion-resistance of SiO2 film catalyzed by acid was better than that of film catalyzed by base, the average transmittance in the range of 400-900nm of acid-catalyzed film after 50h salt spray test was about 93.8%, which was higher than that of base-catalyzed film.

scholarly journals Enhancing the Stability of LiNi0.5Mn1.5O4 by Coating with LiNbO3 Solid-State Electrolyte: Novel Chemically Activated Coating Process versus Sol-Gel Method

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 548
Author(s):  
Valeriu Mereacre ◽  
Pirmin Stüble ◽  
Ahmad Ghamlouche ◽  
Joachim R. Binder
Keyword(s):  
Electrochemical Properties ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Coating Material ◽  
Coating Process ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Coated Materials ◽  
The Stability

LiNbO3-coated LiNi0.5Mn1.5O4 spinel was fabricated by two methods: using hydrogen-peroxide as activating agent and sol-gel method. The structure of the obtained cathode materials was investigated using a scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and the electrochemical properties of the prepared cathodes were probed by charge-discharge studies. The morphology of the coating material on the surface and the degree of coverage of the coated particles were investigated by SEM, which showed that the surface of LiNi0.5Mn1.5O4 particles is uniformly encapsulated by lithium innovate coating. The influence of the LiNbO3 coating layer on the spinel’s properties was explored, including its effect on the crystal structure and electrochemical performance. XRD studies of the obtained coated active materials revealed very small expansion or contraction of the unit cell. From the capacity retention tests a significant improvement of the electrochemical properties resulted when a novel chemically activated coating process was used. Poorer results, however, were obtained using the sol-gel method. The results also revealed that the coated materials by the new method exhibit enhanced reversibility and stability compared to the pristine and reference ones. It was shown that the morphology of the coating material and possible improvement of communication between the substrates play an important role.

The stability of PbZr0.52Ti0.48O3 prepared by the sol-gel method

1998 ◽  
Vol 107 (4) ◽  
pp. 183-187 ◽  
Author(s):  
R.E. Alonso ◽  
P. de la Presa ◽  
A. Ayala ◽  
A. López-García ◽  
C. Livage
Keyword(s):  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
The Stability

Flexible composite-nanofiber based piezo-triboelectric nanogenerators for wearable electronics

2019 ◽  
Vol 7 (21) ◽  
pp. 13347-13355 ◽  
Author(s):  
Yinghong Wu ◽  
Jingkui Qu ◽  
Walid A. Daoud ◽  
Lingyun Wang ◽  
Tao Qi
Keyword(s):  
Electrical Properties ◽  
Uniform Distribution ◽  
Sol Gel ◽  
Fiber Surface ◽  
Wearable Electronics ◽  
Gel Method ◽  
Sol Gel Method ◽  
Composite Nanofiber ◽  
Triboelectric Nanogenerators

A flexible BCZT/PVDF-HFP composite-nanofiber based PTNG is developed. The uniform distribution of BCZT nanoparticles on the fiber surface significantly enhances the electrical properties, where the highest output is achieved when BCZT is prepared via the sol–gel method.

Investigation of Protective Coatings for Carbon Fibers by the Sol-Gel Method

2018 ◽  
Vol 284 ◽  
pp. 1242-1247 ◽  
Author(s):  
R.F. Gallyamova ◽  
S.N. Galyshev ◽  
F.F. Musin ◽  
A.G. Badamshin ◽  
V.A. Dokichev
Keyword(s):  
Carbon Fiber ◽  
Protective Coatings ◽  
Sol Gel ◽  
Fiber Surface ◽  
Soaking Time ◽  
Gel Method ◽  
Sol Gel Method ◽  
Carbon Fiber Surface ◽  
First Time ◽  
Coated Carbon

The article shows the possibility of applying a silicon dioxide coating on the carbon fiber by the sol-gel method. The evaluation of the protective properties of the obtained coatings at a temperature of 600 ° C is given; the changing of the a coated fiber surface morphology during the destruction process is shown for the first time. The destruction of the carbon fiber surface without coating begins at a soaking time of 120 min, which is accompanied by a significant decrease in the diameter of the fiber. The destruction of the coated carbon fiber surface begins at a soaking time of 360 minutes, the fiber diameter changes insignificantly. The paper shows that the sol-gel coatings slow down the oxidation of the carbon fiber more than 2 times.

scholarly journals The Role Sol-gel Method and Doping Ba in the Drastic Reduction of the Annealing Time and the Improvement of the Coupling Between Grains of Bi1.6Pb0.4 Sr2-xBaxCa2Cu3Oy Superconductor 

2020 ◽  
Author(s):  
seyed ebrahim Mousavi Ghahfarokhi ◽  
Saeedeh Zamani
Keyword(s):  
Magnetic Susceptibility ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Ac Magnetic Susceptibility ◽  
X Ray Diffraction ◽  
Drastic Reduction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
The Stability

Abstract In this study, the Bi1.6Pb0.4Sr2-xBaxCa2Cu3Oy superconductors with x = 0.0, 0.05, 0.1, 0.15, 0.2, 0.25, and 0.3 were synthesized at annealing times of 32, 48, 64 h using a sol-gel method. Then, the effect of Ba doped, the annealing times, ac magnetic fields and frequencies in the improvement of the coupling between grains of the Bi1.6Pb0.4Sr2-xBaxCa2Cu3Oy (BPSBCC) superconductors were studied. In order to determine annealing temperature, TGA analysis of x = 0.0 was performed. The structural and ac magnetic susceptibility prepared samples were characterized using an X-ray diffraction, an ac susceptometer and scanning electron microscopy (SEM). The results of ac magnetic susceptibility and structural of the samples indicated that the improvement of the coupling between grains and the stability of the Bi1.6Pb0.4Sr2-xBaxCa2Cu3Oy superconductors with value of x = 0.2 at 845 °C for 48 h have been increased.

LiMn2O4 nanopowders synthesized via gelatin-assisted sol–gel method: Optimization of pH and calcination temperature

2019 ◽  
Vol 33 (08) ◽  
pp. 1950063
Author(s):  
Nasrin Azad ◽  
Hadi Arabi ◽  
Shaban Reza Ghorbani ◽  
Ali Davodi
Keyword(s):  
Calcination Temperature ◽  
Ph Value ◽  
Sol Gel ◽  
Chelating Agent ◽  
The Other ◽  
Effect Of Temperature ◽  
Gel Method ◽  
Sol Gel Method ◽  
The Fourier Transform ◽  
The Stability

In this research, LiMn2O4 nanopowders were synthesized via sol–gel method using gelatin as a novel chelating agent. The effect of temperature and pH on the structure, morphology and particle size of synthesized powders has been investigated by the differential thermal analysis (DTA), the X-ray diffraction (XRD), the Fourier transform infrared (FTIR) and the field-emission scanning electron microscope (FESEM). The crystal structure of LiMn2O4 was completely formed without any impurity phase at a calcination temperature of 750[Formula: see text]C. The peak intensity ratio of I[Formula: see text]/I[Formula: see text], which presents the stability of LiMn2O4 structure, is bigger for the sample with pH[Formula: see text]=[Formula: see text]4 than that of the samples with pH[Formula: see text]=[Formula: see text]7 and 8. The sample with pH[Formula: see text]=[Formula: see text]4 has smaller particles of about 70 nm, with more homogeneity and less agglomeration than that of the other samples. At calcination temperature to 850[Formula: see text]C, the size of the particles has become bigger and the particle surfaces show more clarity in all samples. The effect of the pH value on electrochemical properties was studied by galvanostatic charge/discharge tests. The results show more capacity lost for the sample with pH[Formula: see text]=[Formula: see text]8 with regards to the other samples.

Preparation and Morphological Controlling of Nanophase NaNbO3 by Sol-Gel Method

2008 ◽  
Vol 368-372 ◽  
pp. 140-143 ◽  
Author(s):  
Ying Lin ◽  
Hai Bo Yang ◽  
Fen Wang
Keyword(s):  
Metal Ion ◽  
Ph Value ◽  
Sol Gel ◽  
Chelating Agent ◽  
Gel Method ◽  
Sol Gel Method ◽  
Forming Mechanism ◽  
Water As Solvent ◽  
Rapid Temperature ◽  
The Stability

With citric acid as chelating agent, ethylene alcohol as etherification agent and water as solvent, NaNbO3 nanopowder was synthesized by citrate sol-gel method. The effects of amount of CA and EG, pH value on the stability of the precursor sol were investigated. The evolution of NaNbO3 crystal phase was also investigated by XRD and TG-DTA. The results showed that a homogeneous precursor sol was formed at in the case of n(CA) : n(metal ion)=3:1, n(CA) : n(EG)=1: 2 and 1:3 and pH=7.5. Sintering process largely influences the morphology of the prepared products. Grain-like nanoparticles could be obtained with a rapid temperature rising rate, while nanorods were obtained with a slow rate. The forming mechanism of different morphologies of the prepared nanoparticles was also discussed.

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