Materials Literature
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A numerical method based on molecular dynamics simulations for modeling thermo-mechanical behaviors of polycrystalline materials at micro-scale is presented.The main point is,the conservation laws should be satisfied both at the continuum models and atomic levels at the micro-scale.Compared with conventional continuum…
Micron-sized chitosan microspheres were prepared by inverse suspension crosslinking method,using liquid paraffin as organic dispersion medium,and glutaraldehyde as crosslinking agent.The chitosan microspheres could be prepared in the conditions below: the concentration of chitosan solution was 4.5%,volume ratio of liq…
Carbon black dispersion with excellent stability is prepared with a self-made branched styrene-maleic anhydride polymer (BPSMA)as dispersant.The effects of grinding time,BPSMA concentration and pH value on properties of carbon black dispersion are investigated.The application performance of carbon black dispersion to…
Citric acid(organic acid) combined with phosphoric acid(inorganic acid) were used to modify the commercial USY samples for investigation of the effects of acid modification.The structure and properties of the modified samples were characterized by low temperature nitrogen adsorption method,XRD,FT-IR,and NH3-TPD.Result…
Several molecular sieves with typical structures have been successfully synthesized.The pore structure and acidity of these molecular sieves were characterized by BET and NH3-TPD.Furthermore,the catalytic perfor-mance of these molecular sieves was investigated in C8 aromatic isomerization.The results indicated that th…
It was studied the optimization comdition of preparing root-tip chromosome specimens in Chinese Narsissus,using disassociating cell wall hypoosmotic method in this paper.The effects of the acid dissociation time and low permeability time on the root-tip chromosome specimens preparation in Chinese Narsissus were invest…
The two-component room temperature vulcanized silicone rubber were prepared with the tetraethyl orthosilioate as the curing agent,dibutylition dilaurate as the catalyst,and iron oxide as filler.The effect of the content of iron oxide on the thermal performance of the two-component room temperature vulcanized silicone…
This paper provides a method of plasma technology to solve this problem through the analysis the reasons which cause the difficulty of printing on XLPE material.It proves that the plasma technology can active the surface of XLPE wire and improve the printing effect through the sample test of the plasma equipment.
The swelling resistance testing of rubbers and plastics to dimethyl ether and the mechanical resistance testing of rubbers to dimethyl ether are conducted. The rubbers include ethylene propylene diene monomer (EPDM) rubber, nitrile rubber, plasticizing rubber, butyl rubber and hydrogenated nitrile rubber, and the plas…
Black silicon material was considered an important potential application in the field of remote sensing,optical communications,microelectronics and solar cells,because of wide spectral absorption characteristics.In order to understand the characteristics of the formation mechanism,first establish a geometric model of…
The thioglycolic acid-capped CdSe/CdS core/shell quantum dots can be conveniently prepared in aqueous phase using CdCl2.2.5H 2O,SeO 2,Na2S.9H2O as precursor.The size,crystalline structure and optical properties of the as-prepared quantum dots were characterized by high resolution transmission electron microscopy(HRTEM…
Dissolution and precipitation of alloying elements in GCr15 bearing steel were studied using EDAX9100 spectrum analyzer,and the improved cyclic spheroidizing annealing process was built on this basis.The traditional isothermal spheroidizing,cyclic spheroidizing and the improved cyclic spheroidizing were compared.The r…
This paper introduces the results of experimental research on thermal decomposition characteristics of ethanolamine(ETA) and describes the application of ETA to the secondary system of nuclear power plant(NPP).
This paper researched the influence of carbon,silicon and aluminium on non-oriented silicon steel magnetic aging.Experiment results indicate that the dominant influence of non-oriented silicon steel magnetic aging is carbon content,silicon and aluminium alloy element also have important effect on non-oriented silicon…
Microstructure of cast iron and casting defects was an important factor that influencing its performance,also was a basic measure of cast iron pressure vessel safety and reliability.But the nondestructive testing technology of cast iron pressure still lacked the mature methods and perfect testing standards in domestic…
For the research on elasto-plastic deformation characteristics of grating aluminum in the mechanical ruling depth range,a series of large depth nanoindentation tests are completed about the existing 79 g/mm echelle grating with a Berkovich indenter on a nanoindentation instrument.Some changing regularities of the grat…
It is very important to develop accurate methods for the determination of trace mercury due to its extremely hazardous and bioconcentration effect on human health and the environment.The conventional detection methods for Hg(Ⅱ),such as Atomic Spectrometry,Inductively Coupled Plasma-Mass Spectrometry,Electrochemical An…
Pt-ZSM-5/Pd-ZSM-5 catalysts were prepared by using noble metals Pt or Pd as the active components and HZSM-5 zeolite as the support.The catalytic properties of Pt-ZSM-5/Pd-ZSM-5 catalysts for n-butane isomerization were investigated on a continuous flow pressure microreactor-chromatograph system.The evaluation results…
In order to study the mass loss of projectile penetrating concrete target and work out the design formula that can meet engineering requirement,the relative parameters that influence projectile mass loss were analyzed.Through dimensional analysis,the reduced-scale model and similar criteria for high-velocity projectil…
Based on the preparation of mechanization gluing used to produce honeycomb core materials by glass cloth,the properties and existing problems of the preparation of the prepreg of microwave absorbing composites was analysised,and to bring up a new mechanization preparation of the prepreg,which originated from the doubl…