Characterization of TiO2 Thick Films Photoelectrodes Prepared by the Plasma-Spray Coating

1996 ◽  
Vol 458 ◽  
Author(s):  
N. Kubota ◽  
M. Ayabe ◽  
T. Fukuda ◽  
M. Akashi
Keyword(s):  
Plasma Spray ◽  
Electrode Potential ◽  
Thick Films ◽  
Ultra Violet ◽  
Spray Coating ◽  
Potential Drop ◽  
X Ray Diffraction ◽  
Plasma Spray Coating ◽  
Diffraction Patterns

ABSTRACTSemiconducting TiO2 has some photoelectrochemical reactions under ultra-violet irradiation. These photoelectrochemical behaviors studied as possible protection from corrosion. TiO2 thick films were prepared on stainless steel by plasma-spray coating. The film thicknesses were 50∼100μm. The films were characterized by X-ray diffraction, and the diffraction patterns clearly showed a rutile type structure. The crystallization of the films depends on the spray coating conditions. We have investigated the protection properties of the films by measuring the electrode potential. The electrode potential of the films were reduced by about 250m V under ultra-violet irradiation. This potential drop value is sufficient for protection from the corrosion.

Evaluation of Corrosion Resistance and Characterization of Ni-Cr Coated Structure Using Plasma Spray Coating for Marine Hulls

Plasmonics ◽  
2018 ◽  
Vol 14 (3) ◽  
pp. 595-610 ◽  
Author(s):  
A. Amala Mithin Minther Singh ◽  
P. Arul Franco ◽  
J. S. Binoj ◽  
S. Sahaya Elsi ◽  
M. Divin Kumar
Keyword(s):  
Corrosion Resistance ◽  
Plasma Spray ◽  
Spray Coating ◽  
Plasma Spray Coating

Plasma-Spray Coating Processes: Physico-Mathematical Characterization

1980 ◽  
Vol 102 (3) ◽  
pp. 589-593 ◽  
Author(s):  
B. Gal-Or
Keyword(s):  
Plasma Spray ◽  
Spray Coating ◽  
Graphical Form ◽  
Relative Mass ◽  
Trial And Error ◽  
Plasma Gun ◽  
Plasma Spray Coating ◽  
Operating Variables ◽  
Mass Flow Rates

Approximate characterization of the complicated dynamics of plasma-spray coating processes may be useful in obtaining optimal coatings. The usual industrial method of obtaining such a characterization by experimental trial-and-error procedures may be more time-wasting and costly than a combined procedure of analysis and trial-and-error. This paper describes such an approximate analysis and presents the results in a simple graphical form. Thus, by using a few simplified differential equations which describe the fluid dynamics, temperature and velocity distributions as well as the degree of evaporation of the injected powder in the plasma jet, we illustrate our method for the specific case of spraying molybdenum particles in argon as the carrier gas. The results indicate the various limitations associated with major operating variables such as particle size, relative mass flow rates of gas and particles, plasma temperatures, and distances from the plasma gun. Evaporation losses of the powder are given in Fig. 7.

Plasma Spray Coating of an AA 2024-T4 Al Alloy with Oxide Powders

2010 ◽  
Vol 52 (4) ◽  
pp. 252-256 ◽  
Author(s):  
Serkan Özel ◽  
Hüseyin Turhan
Keyword(s):  
Plasma Spray ◽  
Spray Coating ◽  
Al Alloy ◽  
Plasma Spray Coating ◽  
Oxide Powders ◽  
Aa 2024

scholarly journals Perbaikan Kelarutan Albendazol Melalui Pembentukan Kristal Multikomponen dengan Asam Malat

2020 ◽  
Vol 6 (1) ◽  
pp. 114-123
Author(s):  
Fikri Alatas ◽  
Fahmi Abdul Azizsidiq ◽  
Titta Hartyana Sutarna ◽  
Hestyari Ratih ◽  
Sundani Nurono Soewandhi
Keyword(s):  
Phase Solubility ◽  
Crystal Formation ◽  
Solubility Curve ◽  
X Ray Diffraction ◽  
Ethanol Mixture ◽  
X Ray ◽  
Grinding Method ◽  
Diffraction Patterns ◽  
Phase Solubility Curve

An effort to improve the solubility of albendazole (ABZ), an anthelmintic drug has been successfully carried out through the formation of multicomponent crystal with dl-malic acid (MAL). Construction of phase solubility curve of ABZ in MAL solution and crystal morphological observations after recrystallization in the acetone-ethanol (9:1) mixture were performed for initial prediction of multicomponent crystal formation. ABZ-MAL multicomponent crystal was prepared by wet grinding or also known as solvent-drop grinding (SDG) with acetone-ethanol (9:1) mixture as a solvent followed by characterization of the multicomponent crystal formation by powder X-ray diffraction and Fourier transform infrared (FTIR) methods. The solubility of ABZ-MAL multicomponent crystal was tested in water at ambient temperature and in pH 1.2, 4.5 and 6.8 of buffered solutions at 37°C. The phase solubility curve of the ABZ in the MAL solution showed type Bs. The ABZ-MAL mixture has a different crystalline morphology than pure ABZ and MAL after recrystallization in the acetone-ethanol mixture (9:1). The powder X-ray diffraction pattern and the FTIR spectrum of ABZ-MAL from SDG different from intact ABZ and MAL powder X-ray diffraction patterns and these results can indicate the ABZ-MAL multicomponent crystal formation. The ABZ-MAL multicomponent crystal has better solubility than pure ABZ in all media used. These results can be concluded that ABZ-MAL multicomponent crystal can be prepared by solvent-drop grinding method with acetone-ethanol (9:1) mixture as a solvent and can increase the solubility of albendazole.

scholarly journals PECHINI SYNTHESIS AND CHARACTERIZATION OF Eu3+ DOPED ZnCo2O4 SPINELS

2005 ◽  
Vol 03 (2) ◽  
pp. 24-29
Author(s):  
P.M. PIMENTEL ◽  
A.M.G. PEDROSA ◽  
H.K.S. SOUZA ◽  
C.N.S. JÚNIOR ◽  
R.C.A. PINTO ◽  
...  
Keyword(s):  
Spinel Structure ◽  
Pechini Method ◽  
Synthesis Temperature ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spinel Oxides ◽  
Diffraction Patterns ◽  
Pechini Synthesis ◽  
Spinel Structures

Spinel oxides with the composition ZnCo2O4 and ZnCo2O4:Eu3+ have been synthesized by the Pechini method and characterized by X-ray diffraction, infrared spectroscopy, thermal analysis and scanning electron microscopy. IR spectroscopy revealed the presence of n1 and n2 bands, typical of spinel structures. The formation of monophase cubic spinel structure was confirmed by X-ray diffraction patterns. Extra lines corresponding to other phase has been observed in the powders calcined at 900 ºC. The results showed the extremely lower synthesis temperature than those presents in conventional methods.

scholarly journals Screen Printing Strategy for Investigation of Spectrophotometric Properties of Modified Thick Films of Zirconium Oxide (ZrO2): Tin Oxide (SnO2) Composites

2021 ◽  
Vol 37 (5) ◽  
pp. 1117-1124
Author(s):  
R. M. Nikam ◽  
A. P. Patil ◽  
K. H. Kapadnis ◽  
A. D. Ahirrao ◽  
R.Y. Borse
Keyword(s):  
Tin Oxide ◽  
Integrated Circuit ◽  
Zirconium Oxide ◽  
Screen Printing ◽  
Thick Films ◽  
Ultra Violet ◽  
Spectrophotometric Study ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hybrid Integrated Circuit

There are numerous methods has been investigated and developed for the preparation of thin and thick films. Thick film technology is utilized for the production of electronic devices like surface mount devices, in the preparation of hybrid integrated circuit, in the formulation of heating elements, in the construction of integrated passive devices and sensors. Pure tin oxide (SnO2) and composite 1%, 3%, 5%, 7% and 9 % zirconium oxide (ZrO2) thick films of dimensions 2 cm×1 cm incorporated into pure tin oxide (SnO2) were prepared with standard screen printing method. All samples were fabricated on glass support. The thick films were subjected to drying and firing at 5000C at 5 hours in muffle furnace. Thick films of tin oxide (SnO2) and composite 1%, 3%, 5%, 7% and 9 % zirconium oxide (ZrO2) incorporated into pure tin oxide (SnO2) were checked for Scanning Electron Microscopy (S.E.M), Energy Dispersive X-ray Spectroscopy (E.D.A.X), X-ray diffraction (X.R.D), Fourier Transform infra-Red (F.T.I.R) and Ultra-Violet-Visible spectroscopy (U.V) for surface morphology, elemental analysis, crystalline phases of films, vibrational and spectrophotometric study respectively. In this research paper the spectrophotometric parameters such as absorbance and absorption coefficient with pure and compositional thick films were a part of investigation and surveillance.

scholarly journals Preparation and characterization of oleogels with tallow and partially hydrolyzed tallow as organogelators

2021 ◽  
Vol 72 (1) ◽  
pp. e388
Author(s):  
E. Keskin Uslu ◽  
E. Yılmaz
Keyword(s):  
Loss Modulus ◽  
Solid Fat Content ◽  
X Ray Diffraction ◽  
Shear Rates ◽  
Peroxide Values ◽  
Time Sweep ◽  
Diffraction Patterns ◽  
Time Sweep Test ◽  
Addition Level

The aim of this study was to evaluate the organogelation potential of tallow fat (TF) and partially hydrolyzed tallow fat (HTF) against saturated monoglyceride (MG) and a saturated monoglyceride + diglyceride mixture (MDG) as the organogelators. TF itself created oleogel at a 30% addition level, while HTF, MG and MDG oleogels were prepared at 10% addition levels. Fatty acid composition data showed that the oleogel of HTF (HTFO) was quite similar to those of MG and MDG oleogels. Solid fat content, free fatty acidity and peroxide values were found to be in acceptable ranges for HTFO. Thermal properties, crystal morphology and X-ray diffraction patterns were also evaluated. Rheological analyses indicated that all oleogels had higher storage modulus (G´) than loss modulus (G´´). The time-sweep test showed that after applying higher shear rates, the gels re-formed at rest. Further, all oleogels maintained their gelled consistency until around 54 °C. The results suggest that HTF could be a cheap, efficient, fast melting, safe and readily available organogelator.

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