Materials Literature
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As the porous aluminous porcelain diaphragm tubes in the electrolytic cells, employed in the aqueous reprocessing of spent nuclear fuels, undergo leaching in concentrated nitric acid, corrosion resistant 600 mm long silicon nitride tubes were developed indigenously by reaction bonding of pre-formed silicon green tubes…
ZnS and Mn2+doped ZnS nanoparticles are synthesized through a simple solvothermal method. The structural and optical properties of pure and doped ZnS nanoparticles were studied using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), UV-vis absorption and photoluminescence spectroscopy (PL). X-ray dif…
The La-doped barium ferrites microparticles were successful synthesized by citrate sol-gel method. The structure, morphology and magnetic properties of the ferrite were characterized by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), differential thermal analysis (TG-DSC) and superconducting quan…
The compositional dependence of the local structure of V4+ ions in xGeO2-B2O3-yV2O5 (x = GeO2 mol%/B2O3 mol% and y = V2O5 mol%/B2O3 mol%) glasses and polycrystalline compounds has been studied using an X-band (v 0 ≈ 9.430 GHz) electron paramagnetic resonance (EPR) spectrometer at room temperature. The ratio of the ani…
Polyaniline-modified nanocrystalline TiO2 composites were successfully prepared by in situ chemical oxidative polymerization and used as an efficient photocatalyst for the degradation of methyl orange under natural light. The nanocomposites were characterized by Transmission electron microscope (TEM), Scanning electro…
In present study, we prepared nanoporous Ti oxides by potentiostat and pulse dealloying TiCu amorphous alloy in HNO3 solution. The influence of applied voltage on the morphology was investigated by SEM. The mechanism of dealloying was also discussed. A multilayer nanoporous structure was fabricated using pulse dealloy…
In this paper, a theoretical weight-reduction method was suggested to substitute an underframe material of a box-type bodyshell having cut-outs with an alternative light-weight material. To utilize the material substitution method previously developed for a box-type hybrid bodyshell not having cut-outs, we derived a b…
High quality Aluminium-doped Zinc Oxide (AZO) films have been obtained by suitably controlling the magnetron sputtering parameters and the substrate temperature. The X-ray diffraction studies showed that a transition of orientation from (002) plane to (103) plane, versus substrate temperature. The surface morphology c…
Ceramic coatings were fabricated on AZ91D magnesium alloy in a novel optimized dual electrolyte by Microarc oxidation. The influence of duty cycle on coating thickness, surface roughness, phase composition, microstructure and corrosion resistance were studied. It is found that both the thickness and surface roughness…
In this work, a hydrophobic self‐assembled monolayer, perfluorodecyltrichlorosilane (FDTS) (CF 3 (CF 2 ) 7 (CH2) 2 SiCl 3 ), was proposed as a sacrificial layer for a lift‐off process of a piezoelectric lead–zirconate–titanate (PZT) thin film on a Pt/Ti/SiO 2 /Si substrate. A FDTS fine pattern was firstly vapour depos…
The as deposited amorphous carbon (a-C) thin films were successfully deposited by using ethanol and palm oil precursors via a novel bias assisted pyrolysis-CVD ranging from 300oC to 550oC with constant of negative bias -40V and -50V in 3h and 1h deposition. The thin films were characterized by atomic force microscopic…
High-pressure phase transitions in Al2Br6 were theoretically investigated using first principles density functional methods. A structural transformation from the initial molecular solid phase to a planar polymeric phase is predicted near 0.4 GPa that is accompanied with a substantial volume drop. A unique feature of t…
A gradient annealing cell has been developed for the high-throughput study of thermal annealing effects on thin-film libraries in different environments. The inexpensive gradient annealing unit permits temperature gradients as large as 28 °C∕mm and can accommodate samples ranging in length from 13 mm to 51 mm. The sys…
NiO nanowires have been synthesized at the water bath via single-phase precipitation, using NiSO4·6H2O as nickel salts, NH3·H2O and H2C2O4·2H2O as precipitation agents and H2O as solvent. It has been measured by DSG/TG, X-ray diffiration (XRD) and scanning electron microscope (SEM). The results of the DSC/TG show that…
Low-temperature solution immersion growth of low-dimensional ZnO nanostructures on gold-seeded Si substrate has been demonstrated. pH environment of the precursor solution, Zn(NO3)2.6H2O (zinc nitrate hexahydrate) and C6H12N4 (HMTA) was found to have considerable effect to ZnO morphology and photoluminescence. Structu…
Physical and physicochemical methods were used to reveal the dependence of the reactivity of Ti(IV) in aqueous media with pH 1–3 on their concentration parameters and holding time. It was demonstrated that aluminum affects the aggregative stability of the titanium systems under study and their stability against hydrol…
New ammonium salts of dithiophosphoric O , O ′-diesters have been obtained by simple and convenient (one pot) methods of synthesis from white phosphorus (P4), elemental sulfur, alcohols, phenols (including hydroxyethylated nonylphenols), and amines. It has been revealed that the ammonium salts of O , O -dialkyl dithio…
Solid iron can be observed at environmental conditions and also as metallic component of quasicrystalline alloys. Its behavior in aqueous solution is analyzed from some particular thermochemical relationships. The model utilizes free Gibbs energy to obtain pH and p parameters which are related to iron redox reactions.…
La microscopie électronique à balayage MEB, ou « Scanning Electron Microscopy » SEM, est une technique puissante d'observation de la topographie des surfaces. Cette technique est fondée principalement sur la détection des électrons secondaires émergents de la surface sous l'impact d'un très fin pinceau d'électrons pri…
The influence of rare-earth doping on the electrical properties of ZnO varistors was investigated. In a lower doping region, the electrical properties were greatly improved with the increase of rare-earth contents. The highest voltage gradient value of 1968.0 V/mm was obtained with a rare-earth concentration of 0.06 m…