Materials Literature
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With the current state of the magnesium production,the paper introduces the form and structure of the flow line electrolytic magnesium cell and the process of electrolytic magnesium as to provide reference for the realization of electrolytic magnesium automation and large-scale production.
Ten kinds of following activating fluxes as MgF2,NaF,MnCl2,MgCl2,CaF2,Te,KF,NaCl,ZnF2 and CrCl3 were selected for A-TIG welding of 8 mm-thick titanium alloy compared with conventional A-TIG welding with the same welding parameters,the effect of different fluxes on the formation of weld was investigated.The result indi…
This review introduces some of the pioneering works on radiolysis of polytetrafluoroethylene(PTFE),which started in the mid 1950s.The electron spin resonance(ESR) studies on radiation-induced radicals and their corresponding peroxy radicals in PTFE were reviewed,with respect to experimental conditions,irradiation dose…
CdS quantum dots were synthesized in aqueous solution by using mercaptoethylic acid as the stabilizer and surface-modification reagent. The 512.4 nm fluorescence emission which was caused by the cavity-electron recombination on surface trap of CdS quantum dots was quenched in the presence of hemin. The quenching mecha…
By mean of TEM,tensile and damping property testings,the influences of 4%Gr on the microstructure,mechanical and damping properties of 7050 alloy,and the influences of heat treatment on the microstructure,mechanical and damping properties of 7050Al/4%Gr composite have been studied.A discussion was made on the internal…
The structures and energies of neutrals and charged arsenic clusters(Asn,Asn-1,Asn+1,n=2-5) were studied with G3 theory.The ground state structures were presented.The electron affinities,ionization potentials,and atomization energies were evaluated and compared with effective experimental values.The results revealed t…
The application and development of chitosan in the field of agriculture were introduced,such as seed treatment formulation,plant growth regulator,elicitor of plant disease,insecticide,fertilizer and soil modifier,fruit and vegetable fresher,food and feed additive,in order to provide references for the exploitation and…
The cutting performance of modified Al2O3 based ceramic cutting tools ASs and LTN in continuously turning stainless steel 1Cr18Ni9Ti has been investigated.The result shows that both of the two tools ASs and LTN have better wear resistance at relatively higher cutting speed,the main wear mechanisms for ASs are adhesive…
Rare earth elements have obtained applications in the field of new materials in a wide range for the electrical,optical and magnetic properties so unique.In this paper,the progress of the application of rare earth magnetic materials,electrodeposition system and the mechanism of electrolytic co-deposition were reviewed.
Taxonomic composition,distribution and cell densities of phytoplankton of 21 lakes in the middle regions of Yangzi River were investigated.Phytoplankton in these lakes was mainly composed of diatom and green algae.And 56 taxa(including variations)belong to 36 genus were observed.In mesotrophic lakes,the relative abund…
Based on the water engineering practice and the standard laboratory ratio,laboratory mixture proportion of concrete could be transformed and adjusted in time,according to the on-site sand and gravel aggregate water content,particle size,additives,environmental construction techniques and concrete state,to make it be b…
Foam flooding is a kind of tertiary recovery which can adjust the water injectivity profile for multilayer water injection and improve the oil displacement efficiency.Its application result depends on the selection of foam agents.This paper conducts static performance evaluation and selection of three different foam a…
A water-based acrylic resin was synthesized,based on which the water-based acrylic top coatings were prepared.The influence of monomer,emulsifier,initiator and polymerization temperature on the film properties were discussed,then the optimum process conditions were determined.The water-based epoxy primer matching topc…
ZnO photocatalyst were prepared by precipitation method using ZnC2O4·2H2O and(NH4)2CO3 as raw materials.The photocatalyst was characterized by powder X-ray diffraction(XRD) and transmission electron microscopy(TEM).The effects of catalyst loading,initial dye concentration,the illuminating distance(the distance between…
The water-soluble maleoyl chitosan(MCS) was prepared at room temperature by using sodium carbonate as catalyst.The analysis results by FT-IR show that the maleic anhydride is successfully grafted onto chitosan molecule,and the thermal properties of MCS after acylation reaction significantly increase comparing with chi…
The electroless nickel plating was carried out with a composite additive consisting of CeCl3 and KI.The effect of the composite additive on deposit was studied by scanning electron microscopy(SEM),X-ray diffraction(XRD),potentiodynamic polarization measurement and electrochemical impedance spectroscopy(EIS).The result…
Magnetite nanoparticles(Fe3O4) were synthesized by solvothermal method at 200℃,using FeCl3·6H2O,ethylene glycol and PEI as reactants.X-ray diffraction,transmission electron microscope,vibrating sample magnetometer and infrared spectrometer were used to characterize the magnetite nanoparticles.The influence of reaction…
Double carbonation route for the synthesis of hydrophobic chain-like nanometer calcium carbonate was studied.In the process,citric acid and cetyl acid were used as an organic substrate to induce the nucleation and modify the surface of calcium carbonate separately.The operating parameters such as temperature and the c…
A new Pd-based monolithic catalyst on cordierite honeycomb ceramics substrate without coating(Pd/cord) was prepared via electroless plating.The results of activity tests for catalytic combustion of toluene showedthat Pd/cord catalysts with low Pd loading had good catalytic activities: toluene could light off at 201 ℃,…
The SiO2/PMMA composite colloid microspheres were generated by a semi-continuous soap-free emulsion polymerization technique using the hydrophilic SiO2 microspheres with uniform size(230 nm)without silane coupling agents.The composite microspheres were prepared by polymethylmethacrylate(PMMA)as the shell and SiO2 as t…