Materials Literature
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The breakdown of precipitated dust layer on the collection electrode will deteriorate the properties of ESP seriously. By means of the theory of the dielectric polarization and gas discharge, the heaping model of precipitated dust layer, forming of surface potential of deposit and the characteristics of voltage and cu…
The self-assembly of ZnO nanorod bundles into interesting flowerlike architectures were achieved via a simple hydrothermal route.The as-prepared samples were characterized by X-ray powder diffraction(XRD),scanning electron microscope(SEM),and high-resolution transmission electron microscope(HRTEM).The composed ZnO nan…
Tri(2-hydroxyethyl) isocyanurate(THEIC) was used as the curing agent to synthesize the polyurethane elastomer modified by isocyanurate(m-PUE).In this research,the effect of isocyanurate content on the thermal properties,mechanical properties and solvent resistance of PUE were studied.The results showed that the m-PUE…
The effects of partial pressure of CO2 on corrosion behaviours of tubing steel N80 in simulated corrosion environment of oilfield,corrosion inhibitors dosage on the inhibition efficiency,and the compatibility between corrosion inhibitors and other oilfield chemicals are studied by weight loss method.The results show t…
Joint replacement implants are applied more and more widely.In this paper,the clinical application and development of materials used for joint replacement implants are reviewed.Firstly,the essential requirements for materials used for joint implants and relevant international and national standards are presented.The c…
Based on a constitutive model of viscoelastic materials,numerical simulation is carried out on the thermal load of some engine tubular charge under the load of constant or week change environment temperature.The stress field distribution rule of the motor grain is obtained.The result shows that the maximal stress caus…
The effect of alternating magnetic field frequency on the meniscus,microstructure and element distribution of the static formed ingots of minitype square billet of 7050 aluminium alloy.The results indicate that the meniscus of melt was higher when the frequency of the alternating magnetic field was 777 Hz.The grains w…
The new product mix woven by silk yarn and environmentally friendly cuprammonium rayon is of beautiful luster and soft hand-feel and is quite comfortable to wear.This mix-woven technique has mainly solved the following difficulties: the abrasion resistance of silk yarn under high warp density,pilling of dyed cuprammon…
BaTiO3 is one of most widely used ferroelectric materials and has been extensively studied.Under high pressure,the crystal structure can be transformed.In this paper the progress in research on the effect of pressure on the dielectric properties of crystal structure of single crystal and polycrystalline BaTiO3,the inf…
This paper summarizes the progress of research on liposomes for controlled drug release.It presents the principles of in-vivo liposome drug delivery as well as the advantages and disadvantages of conventional liposomes.It highlights two most promising types of liposomes-sterically stabilized liposomes and targeted lip…
Ceramic coaitng was fabricated on AZ91D magnesium alloy in alkaline silicate solution by micro-arc oxidation(MAO).The optimal composition of the electrolyte is:sodium silicate 5 g/L,sodium fluoride 2 g/L-3 g/L,glycerol 8 mL/L-12 mL/L,potassium hydroxide 2 g/L.
The synthetical conditions of 1,1'-dimethyl ferrocenedicarboxylate were investigated by using 1,1'-ferrocenedicarboxylic acid and methanol as raw material.The effect of catalyst on yileds were discussed.1,1'-dimethyl ferrocenedicarboxylate was synthesized by new synthesis technology of one-pot method.The effects of th…
Di-octyl-di-tridecyl pyromellitate is a base oil of luboil with high temperature resistance and other good properties.Di-octyl-ditridecyl pyromellitate was synthesized with using non-acid catalyst.This process needs no washing and neutralization,and has no corrosion for equipment.The optimum reaction conditions are as…
End-group modified poly(trimethylene terephthalate) polyester(PTT-TFA) was prepared by the esterification reaction between the hydroxyl end-groups of PTT and trifluoroacetic acid at room temperature,and its thermal properties were investigated by using the differential scanning calorimetry(DSC).The results show that t…
Using waterborne acrylic resin as main film-forming material and hollow glass microbeads as heat-insulating filler,a waterborne monocomponent anticorrosive and heat-insulating paint was prepared by adding anticorrosive pigments.The optimal pigment-to-binder(P/B) ratio of the paint was 1.0 based on the results of elect…
Fluororubber(FKM) and silicone rubber(MVQ) blends were prepared by using fumed silica as a reinforcing filler.The Effect of content and specific area of fumed silica on mechanical properties,heat ageing properties and oil-resistant properties of FKM/MVQ blends were studied.The tensile fracture of the blends were obser…
In this article,the turbine cylinder of the 9F series GE company steam combined cycle unit as an example,outlines the reasons of the high and medium pressure steam turbine shell arm uneven load distribution . Provided a method that how to control the shell arm uneven load distribution in installation procedure. To avo…
A Keggin-type polyoxometalate [Mn(phen)3]2(H3O)[BW12O40]·2H2O was prepared under hydrothermal conditions,and characterized by elemental analysis,IR,TG and single crystal X-ray diffraction analysis.The title compound crystallized in a Monoclinic system,space group C2/c,a=2.728 5(3) nm,b=2.506 0(3) nm,c=1.633 66(18) nm,…
To effectively improve the enzymatic digestibility of carbohydrates in lignocellulose,the effect of the pretreatment conditions on the delignification and enzymatic digestibility was discussed with corn cobs as the investigated object and the feedstock soaking in aqueous ammonia under the modest conditions.The optimum…
Al-Ga-Bi-Pb alloy was prepared by adding elements such as Ga,Bi and Pb.The effects of different annealing and quenching conditions on the corrosion and polarization of Al-Ga-Bi-Pb alloy in 4 mol/L KOH solution were investigated by the methods of weight loss,AC impedance and open circuit potential determination.The cor…