Materials Literature
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In this paper,natural pyrethrum nano-capsule with a wall of the copolymer of styrene(St) and methyl methactylate(MMA) was prepared by means of microemulsion polymerization.The influence of emulsifier content,shell-core ration on particle size,size distribution,structure of nano-capsules was studied.The microemulsion i…
In order to explore the relationships among the thickness of radar absorbing material(RAM),the volume content of absorbents in the RAM and the microwave absorption property,the radar absorbing material employed the carbonyl iron powder and ethylene-propylene-diene monomer(EPDM) as its absorbent and matrix was prepared…
Anatase TiO2 thin films were deposited in a d.c. reactive magnetron sputtering system. It was found that there is a strong dependence between anatase-rutil structures of TiO2 films and the technological conditions, the most relevant parameter being the oxygen percentage from the argon and oxygen mixture. Our measureme…
In this work, we develop a rapid polymerase chain reaction (PCR) device with thermoelectric cooling for the fast PCR thermo cycling process. The PCR system utilizes a 60W commercial thermoelectric module, the Tianjin TEC1-12710 model, which allows fast heating and rapid cooling in the PCR temperature cycles. In this s…
High voltage square impulses from converter can make stator insulation of inverter-fed motors damaged much earlier. There are many differences in insulation aging mechanism between under continuous impulses and under sine waves. In order to test insulation properties under continuous impulses, a new insulation aging t…
Silica-ammonium chloride nanotubes, generated by the condensation of sodium silicate onto ammonium cation-modified anionic sodium dodecyl sulfate (SDS) micellular templates, readily create hierarchical structures through the self-assembly into thicker nanotubes, belts, and ultimately into centimetre long macrofibers.…
Nine coordinated [Ln(quercetin) 3 ]nH 2 O complexes were synthesized in non-aqueous solution (where, n = 0 for Pr, Sm, Gd, Tb, Dy and Ho; n = 3, for La and Nd). The complexes were characterized by elemental analysis, molar conductance, UV – vis spectra, IR spectra, thermal analysis and NMR spectra. The optimized struc…
In the lighting industry, the concept of ceramic cold cathodes provided with an inside tungsten coating is under consideration to be applied in mercury-free fluorescent lamps for advertising purposes. In this regard, the applicability of chemical solution deposition to fabricate metallic films on the inner surface of…
In this paper, we give a review of recent transition path search methods for nanoscale phase transition simulation A potential energy surface (PES) characterizes detailed information about phase transitions where the transition path is related to a minimum energy path on the PES. The minimum energy path connects react…
There are many techniques to deposit alumina film; most of these methods required special environment such as electrochemical deposition or complicated apparatus such as plasma spraying. In the present paper, anodizing of AZ31 in NaOH solution with co-precipitation of nano-size alumina particles was investigated to pr…
The corrosive behavior of mild steel in 1M HCl solutions containing selected imidazolines of fatty acids with C 7 -C 17 was investigated using weight-loss method, potentiodynamic polarization technique and scanning elecron microscopy. The results obtained revealed that all the studied imidazolines are effective in red…
Hydrogen storage in a model b.c.c. metallic nanoparticle was simulated by molecular dynamics method by changing length and energy parameters of metal-H bonds. A global image of hydrogen storage from the gas phase into the metallic nanoparticle was successfully reproduced by a single simulation. In case of weak metal-H…
The paper deals with optimization of drying time and energy consumption in foam-mat drying of liquid bio-materials. A clarified apple juice mixed with methylcellulose in mass concentrations 0,5; 1,0; 2,0 and 3,0 % was whipped in a blender to generate foams of different density varying from 0,21 to 0,45 g/cm 3 . The fo…
We compared fluctuations of electron beams emitted from single-atom electron sources, on which the surface Pd metals were deposited by two different techniques, vacuum deposition and electroplating deposition. The similar nano-pyramids were fabricated successfully by both the techniques, but the stabilities of the bea…
Laser welding is a promising joining method for magnesium alloys. The process reliability of 2-mm ZE41A-T5 butt joints welded by a 4 kW Nd:YAG laser was investigated from weld geometries, defects and mechanical properties using Weibull statistical distribution. Smooth, geometrically regular and macroscopically defect-…
Partial discharge (PD) diagnosis is essential to identify the nature of insulation defects causing discharge. The problem of PD signal recognition has been approached in a number of ways. Most of the approaches are based on laboratory experiments or on signals acquired during off-line tests of industrial apparatus. On…
This research studies the forces on the windings of transformer due to inrush current. These forces are compared with the corresponding forces due to short-circuit of the windings. Two-dimensional finite element computation of a single-phase shell-type transformer is carried out based on the maximum permissible inrush…
Methyl ethyl ketone (MEK) is a good solvent for polyvinyl chloride (PVC) and it has been proposed for use in PVC recycling. In the recycling process, fine particles of 3PbO·PbSO4·H2O, used as a thermal stabilizer in PVC products, are dispersed and not dissolved in the solvent. To establish methods for removing of 3PbO…
Short nylon-6 fibre reinforced acrylonitrile butadiene rubber (NBR) composites were prepared and the interfacial adhesion was evaluated by the restricted solvent swelling technique. The solvents used were N,N-dimethyl formamide (DMF), dimethyl sulphoxide (DMSO) and acetonitrile. As the fibre content increased, the sol…
This paper presents a model developed for determining fuel particle and fuel pebble temperatures in normal operation and transient conditions based on multi-scale modelling techniques. This model is qualified by comparison with an analytical solution in a one-dimensional linear steady state test problem. Comparison is…