Materials Literature
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Process analytical technologies had been applied to manufacturing processes for decades. Recently, the US Food and Drug Administration (FDA) had re-defined the phrase and implemented into an initiative focusing on improving the several aspects of pharmaceutical industry; European agency for the evaluation of Medicinal…
Eutectic morphologies of as-cast Mg-Cu alloys with different copper content were observed with optical microscope(OM) and scanning electron microscope(SEM).The formation mechanism of eutectic structure and faceted characteristic of CuMg2 phase were described.The results show that in hypoeutectic Mg-Cu alloys,the eutec…
The influences of different heat treatment(solution and aging treatment) on the mechanical properties of Ti-6Al-4V titanium alloy were studied.The relation between the microstructure,impact fracture images and mechanical properties were analyzed by metallurgical microscope and environment scanning electron microscope(…
Status of technology for inspection of cosmetics in China was investigated and reviewed in aspect of current standards,key technologies and inspection capacity.To counter the problems existed in the technological system for inspection of cosmetics in China,the establishment and perfection of the inspection technologic…
We studied on the principium of frozen semen of bovine on the basis of non-linear dissipative structure theory which broke through the fetter of traditional doctrines.Based on thecrystal stateand glass stateresults of study on frozen semen in liquid-to-solid in recent years,the frozen mechanism of bovine semen was dis…
Aiming at the die casting process of up-shelter for motorcycle engine gearbox,two-branch gating systems and multi-branch gating systems were designed.The filling mould and solidification process of two gating schemes were simulated with finite element Anycasting software.The defects of the coerced gas and bad density…
According to the increase of by-product C4 from megaton ethylene plant in our country year after year,the separation methods of n-butene in the mixed C4 and several major chemical use directions of separated high purity n-butene at present were comprehensively introduced after the etherification in this paper.
Experiments of comparison of the protruding bionic surfaces and the common plate surfaces were made,at the same time,experimental of comparison of the corrugated bionic surfaces and the plate surfaces were made.The experiments’ results showed that,on the certain condition,the protruding bionic surfaces can not reduce…
Light emitting diode(LED)has been widely applied in the field of lighting and displaying.Flaky alumina powders was synthesized using aluminum nitrate and urea as the raw materials,PEG 2000 as the surfactant and aluminum fluoride as the additive.The YAG∶Ce3+ phosphor was synthesized with flaky alumina by the method of…
Ferric supported actived carbon was prepared by impregnation-calcination method with actived carbon as the carrier.The effects of type of iron salts,calcination temperature,iron ion concentration on the catalytic ozonation of sludge and sludge properties after treatment were investigated.The results showed that the hi…
In order to determine the effect of surfacing current on the microstructure and properties of Fe-Cr-Ti-C alloy wear-resistant surfacing layer,the microstructure and wear resistance of the surfacing layer under different surfacing current were studied,and the influence of surfacing current on in-situ synthesis of M7C3…
Polymer solar cells attracted more and more attentions.Various researches were being done to improve the performance of polymer solar cells and mainly contained discovering new materials and optimizing the structure of devices.Research progress of water soluble conjugated polyelectrolyte as cathode modified layer was…
Three-dimensional physical and mathematic models are established for the internal heat transfer in a defective furnace.The temperature distribution and infrared characteristics of the surface when the defect in a furnace is detected in different positions are studied.The analysis result shows that the firebricks play…
Research on the nanostructured Al-Mg alloys wasreviewed.The large increase in strength and drastic decrease in plasticity are commonly observed in nanostructured,Al-Mg alloys.Several approaches were proposed for optimization of strength and ductility simultaneously in nanostructured AlMg alloys.Finally Al-Mg alloys wi…
The hydraulics parameters of the gas-liquid two-phase flow in air-lift tubular MBR was simulated and verified using CFD and physical models.The results of CFD simulation showed that when the aeration rate of a single tube was greater than 43 L/h,a shear stress of more than 10.1 Pa could be obtained on the membrane sur…
Commercialization of polymer electrolyte membrane(PEM) fuel cells is seriously restricted by its poor durability.Trace amounts of CO,CO2,H2S and NH3in fuel gas and pollutants,such as NOx,SOx in air are the main factors which affect the durability of PEMFC.The influence and mechanism of fuel gas impurities and pollutan…
In order to determine the ultimate strength of β 〞-Al2O3 ceramics tubes which are the key components of sodium-sulfur batteries,the size of ceramic tubes was measured by ruler,slide caliper and wall thickness gauge,and the blasting limit pressure was obtained by the hydrostatic pressure bursting test.The ultimate stre…
Uniform and superparamagnetic Fe3O4 nanoparticles were synthesized by chemical co-precipitation successfully using NH3.H2O as precipitating agent.In order to reduce the aggregation of Fe3O4 nanoparticles,organic additives of oleic acid was used as surface modification agent coating onto the surface of Fe3O4 nanopartic…
The advantages and application status on foam concrete are introduced,compares its performance with the ones of common concrete and aerated concrete,the common problems in the application of foam concrete and its development prospects are summarized.
The asymmetric linear shaped charges(LSC) were fired at RHA armor steel,and the experimental results were presented.The jet formation and penetration were simulated with finite-element code LS-DYNA3D.For the linear shaped charge configuration,it is suggested that at the eccentric distance between liner and charge is 1…