Materials Literature
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Fluorocarbon coating was exposed to artificial weathering environment produced by the xenon lamp/condensation weathering equipment for different time periods. The degradation process was studied by electrochemical impedance spectroscopy (EIS), Fourier Transform Infrared Spectrometry (FTIR) and optical microscope. The…
A rapid and efficient method has been developed for the synthesis of azo aromatic diacyl chlorides from nitro aromatic acids by using dimethyl benzene as solvent. The products are obtained in good yields with high purity.
Nanoscale supported tungsten oxide catalysts were synthesized by hydrothermal method using γ-Al2O3, Nb2O5, TiO2, ZrO2 and CeO2 as supports with a loading of 5~20% WO3 on each supports, respectively. The physical properties and structural information were characterized by BET, XRD, ICP-AES and in situ Raman spectroscop…
Based on the mechanism research of buildings corroded by the high salinity groundwater, this paper suggested that the corrosion problem can be solved by improving the anti-corrosion capability of the buildings in itself and reducing erosive medium. This paper put forward a repair technology which use the CM anti-Corro…
The first-principles calculation based on density functional theory has been carried out to study the microstructural feature of the novel 24R-type long period stacking ordered structure in Mg97Zn1Y2 alloy. The lattice positions of the Y and Zn atoms are determined theoretically, it is shown that the additive atoms ar…
An atomistic simulation of the structural properties of the new ternary A4Rh13Si9 and A4Ir13Si9 compounds, where A is Th, U, has been carried out using interatomic pair potentials based on the lattice inversion method. The calculated lattice parameters are corresponding to the experimental results. The phase stability…
Abstract Review: 47 refs.
AZ91 magnesium alloy is selected as the matrix metal. SEM, EDS, Tafel and EIS were adopted and spot test was carried out to investigate the influence of pH value, phytic acid concentration, temperature,conversion time on corrosion resistance of conversion coatings. Result shows that process of phytic acid forming is t…
Coating craft process is often used on the hole surface, thus it must affect the degree of the stress concentration near the hole edge. Airy stress function methodology is used to obtain the analytical stress solution for a plate with a small coating circular hole in the center and subjected to the uniaxial uniform te…
Nanostructured α-Ni(OH)2/ mesoporous carbon composites were synthesized by a facile solvothermal method using sodium dodecyle sulfate as a soft template and urea as a hydrolysis-controlling agent. The obtained products were characterized by X-ray diffraction(XRD), and scanning electron microscopy(SEM). Electrochemical…
Normal operation of electrical machines and equipment is conditioned, among others, by the insulation systems status. Therefore, diagnosing insulation systems in order to estimate their lifetime reserve is very important, both for new equipment and especially for those in operation. This paper presents a lifetime calc…
White organic light emitting devices with the structure of ITO/ MeO-TAD (15 nm) /NPBX(40 nm) /DPVBi(x nm)/ Rubrene(0.3 nm)/DPVBi (20-x) nm /BCP(5 nm) / Alq3 (30 nm) /LiF(0.5 nm) /Al. High-mobility MeO-TAD is added into the region between ITO and NPBX to increase hole injection and transport. The BCP layer was used as…
In order to search for new wear resistant materials used as drilling tools and improve the service life and drilling efficiency, the 7Cr7Mo2V2Si steel was prepared and its abrasive wear behavior and mechanisms were studied under both dry and water wear conditions. The research results show that the wear losses of the…
A new photochromic diarylethene 1-(3,5-dimethyl-4-isoxazolyl)-2-[2-methyl-5- (3-chlorophenyl)-3-thienyl]perfluorocyclopentene (1o) has been synthesized. Its properties, including photochromism and fluorescence were investigated in detail. It underwent reversible cyclization and cycloreversion reactions upon alternatin…
Titanium dioxide (TiO2) thin film has been successfully synthesized deposited on glass substrates by the sol–gel dip-coating method using freeze drying technique. The precursor and TiO2 film were characterized using thermogravimetric and differential scanning calorimetric (TG-DSC), X-ray diffraction (XRD) and atomic f…
The recent development of carbon fiber sizing agent was introduced in this article. The sizing agent used in carbon fiber was synthesized at a temperature range of 55-60°C using epoxy resin and vinyl acetate as a monomer together, octyl phenol ethoxylated(OP-10) as the emulsion agent, ammonium peroxydisulfate as the s…
Methods of separating mixed isomers of nitrochlorobenzene (NCB) were reviewed and analyzed in this paper, A new integrated technology including multiple side-draw distillation and continuous crystallization was raised for refining of high-purity p-nitrochlorobenzene(p-NCB) and o-nitrochlorobenzene(o-NCB) from the NCB…
In order to reduce the emission of volatile organic compounds (VOCs) and save the non-renewable resource, a novel interior wall coating with high bond strength based on metakaolin and modified starch was developed. The process on researches includes three steps. Firstly, cassava starch was reformed including etherific…
The effect of applied potential on the stress corrosion cracking (SCC) initiation of X-70 pipeline steel in near-neutral pH solution has been investigated by using a slow strain rate testing (SSRT) apparatus and electric potential drop (EPD) method. It was found from the SSRT results that the initiation stress decreas…
With phthalic anhydride, urea, metallic salt and ammonium molybdate as raw materials, Cobalt metal phthalocyanines is prepared by solid-phase method, and the cobalt metal phthalocyanine is modified by the shun dl-aspartic acid anhydride. In the homogeneous conditions, the effects of the reaction temperature, the react…