نتایج جستجو برای: sol gel coating

تعداد نتایج: 145930  

Journal: :iranian journal of chemistry and chemical engineering 0

to improve the corrosion protection of copper metal, 0.01m concentration of 1h-1,2,4-triazole-3-thiol (tat) was incorporated into the hybrid sol-gel monolayers containing 3-glycidoxypropyltrimethoxysilane (gptms) and tetraethoxysilane (teos). it was further subjected to hydrolysis and condensation reaction to form a sol-gel matrix. the tat-doped hybrid sol-gel coating was applied over the coppe...

Journal: :international journal of nano dimension 0
p. doodman department of material engineering, science and research branch, islamic azad university, tehran, iran m. a. faghihi-sani department of material engineering, science and research branch, islamic azad university, tehran, iran n. barati 2department of materials science and engineering, sharif university of technology, azadi street, p.o. box 11365-9466, tehran, iran a. afshar 1department of material engineering, science and research branch, islamic azad university, tehran, iran.

nanostructured alumina thin films were coated on stainless steel by sol-gel dip coating method. in order to prevent crack formation, al2o3 films were kept in a solvent bath immediately after coating to reduce the rate of drying. effects of calcination temperature and withdrawal speed on structural properties were analyzed using xrd and sem. topography and thickness of coatings were analyzed by ...

Journal: :iranian journal of pharmaceutical sciences 0
hossein najafi department of materials science and engineering , sharif university of technology, tehran, iran, ziarat ali nemati department of materials science and engineering , sharif university of technology, tehran, iran, zahra sadeghianb oil research center, tehran, iran nafiseh sohrabi department of materials science and engineering , sharif university of technology, tehran, iran

this article describes the preparation and analysis of nano hydroxyapatite (ha) films on stainless steel 316l through sol-gel technique. the process started with preparation of a nitrate and phosphate sol. after aging the sol for 24 h at room temperature a ss316 substrate was dip-coated and heat-treated at 350 to 450 °c for different times in air. the coating phase and structure on substrate we...

2004
X. Zhang H. Lu

We report on the fabrication and characterization of thick UV-patternable hybrid sol-gel films by spin coating using a modified sol-gel process. Thick coating of 25 microns with crack-free surface can be produced by one spin coating step. Thick layers of more than 100 μm can be obtained with a multi-coating process. Characterization using different techniques including optical microscope and at...

Journal: :iranian journal of pharmaceutical sciences 0
afrooz latifi faculty of biomedical engineering, islamic azad university, science and research branch, tehran, iran abdollah afshar department of material science and engineering, sharif university of technology, tehran, iran aliasghar behnamghader materials and energy research centre, tehran, iran sedigheh joughehdoust faculty of biomedical engineering, islamic azad university, science and research branch, tehran, iran

the synthesis of titania via sol-gel method has been widely studied. in the present work, titania was deposited onto a titanium substrate via sol-gel method. different processing parameters such as the repetition number of dipping/heat treatment process and dipping time have been studied to obtain the homogenous titania coating. phase and microstructural evaluation of the powder and coating sam...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2007
hadi adelkhani bahram mellatnavaz hossein roohi mansoor noorbakhsh

as we know sol-gel is one of the most important techniques for thin film preparation. in this paper, high transmission silica thin films have been prepared by dip-coating process from a new silicon-alkoxide solution. the prepared sol was stable for 45 days which is very important to characterize the coating process. the optical properties as a function of aging time, withdrawal rate, and heat t...

2009
Y. Ueki

Development of effective electrical magnetohydrodynamic (MHD) coating insulating induced current path is one of key fusion technologies for fusion blanket research and development. Electrical insulation coating is extremely important for lead lithium (PbLi) MHD thermofluid study from pointview of secure electric insulating wall condition. The alumina (Al2O3) coatings fabricated by a sol-gel met...

Journal: :Journal of neuroscience methods 2009
Andrew L Pierce Salah Sommakia Jenna L Rickus Kevin J Otto

The reactive tissue response of the brain to chronically implanted materials remains a formidable obstacle to stable recording from implanted microelectrodes. One approach to mitigate this response is to apply a bioactive coating in the form of an ultra-porous silica sol-gel, which can be engineered to improve biocompatibility and to enable local drug delivery. The first step in establishing th...

2015
Rita B. Figueira Carlos J. R. Silva Elsa V. Pereira

Previous studies have shown that the barrier effect and the performance of organic-inorganic hybrid (OIH) sol-gel coatings are highly dependent on the coating deposition method as well as on the processing conditions. However, studies on how the coating deposition method influences the barrier properties in alkaline environments are scarce. The aim of this experimental research was to study the...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2012
behzad sadeghi rasoul sarraf-mamoory hamid reza shahverdi,

limn2o4 spinel cathode materials have been successfully synthesized by solid-state reaction. surface of these particles were modified by nanostructured lifepo4 via sol gel dip coating method. synthesized products were characterized by thermally analyzed by thermogravimetric and differential thermal analysis(tg/dta), x-ray diffraction (xrd), scanning electron microscopy (sem), and energy dispers...

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