Materials Literature
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The changing law of nitrogen in slightly polluted water source treated by ozone-biological activated carbon fiber was studied through pilot test.The results showed that ammonia nitrogen accumulation phenomenon appeared when ammonia nitrogen concn.of influent was low.The adaptability of BACF column to environment was b…
The microstructure evolution of a TWIP steel during equal channel angular pressing(ECAP) was investigated experimentally.After one pass,a large number of deformation twins with band widths of 10-40 nm were produced.At the same time,these deformation twins were cut down by microshear bands.With increase of pressing pas…
The electromagnetic-hysteresis yarn tensioning device was discussed in this article.Using the theoretical calculations and the analysis methods of the mechanism of magnetic element,the working principle of magnetic hysteresis,technical key points and applications of the electromagnetic-hysteresis yarn tensioning devic…
This rare earth catalyst involved mixture of La,Ce,Pr and Zr for the research object.The preparation of(LaCePr)0.6Zr0.4O2 has the property of thermal decomposition,and emits CO2.TG and DTG are used to study the thermal decomposition process of(LaCePr)0.6Zr0.4O2.The temperature of thermal decomposition was determined a…
A mono-domain ferroelectric liquid crystal device(FLCD) has been fabricated using an asymmetric cell,typically the combination of a polar self-assembled monolayer(SAM) for one substrate and a rubbed polyimide for the other substrate.The contrast ratio increases with the polarity of SAM.It is believed that the directio…
Silane-based organic-inorganic hybrid films doped with cerium nitrate were prepared on LY12 aluminum alloy by sol-gel method using γ-glycidoxypropyltrimethoxysilane(γ-GPTMS) and tetraethylorthosilicate(TEOS) as precursors.The evolution of corrosion resistance of the Ce-doped silane-based hybrid coating with immersion…
Adopting optimized plasma spraying parameters,A series of thicknesses(100 μm,250 μm,300 μm and 550 μm) NiCrAl coatings were sprayed on 45 steel substrate,analyzed the relationship between the coating's thickness and bonding strength,micro-hardness,porosity analyzed.The results show that the bonding strength and micro-…
The influence of ESDD and NSDD on flashover voltage was analyzed with single porcelain insulator(XP-210) as test sample in order to solve the damage problem of pollution flashover.The results show that ESDD and NSDD have independent influence on the flashover voltage in artificial contamination test;the relationship b…
Using Cu(Ac)2 as precursor,CuO nanoparticles were prepared under microwave irradiation.The CuO nanoparticles were studied by using TEM,XRD analyzer.The results showed that CuO nanoparticles with good dispersibility were synthesized via the novel method mentioned above.Microwave(MW) heating was a rapid and effective wa…
Devicenet field bus is adopted to construct a two-level control system,the upper-level computer system using MCGS configuration software to realize the status monitoring and alarm for the process and equipment,the under-level computer system taking the PLC as the core,which better achieves the requirements of the auto…
High coercivity magnetic nanoparticles(CoFe2O4) were synthesized by the combustion method with glycine as fuel followed by proper thermal annealing treatment to induce the crystallization.Structural and magnetic properties of the products were investigated via X-ray diffractometry,a scanning electron microscopy,and a…
Mechanical alloying(MA) is an advanced material processing technology whose process is a forced imbalanced reaction,and is adopted gradually in many fields.Effects of RE element Dy on the magnetic entropy change of GdSiGe series alloys made by MA were researched.It is concluded that GdSiGeDy series alloys not only hav…
Monolayer films with high permeability,being thin and light,are very promising to be new absorbers used in mordern electronic systems.It has been conventionally thought that single-layer absorbers with the thickness to be /4 have the most efficient absorption.While this presentation demonstrates analytically that the…
In order to get the relationship between properties of the diamond-like carbon(DLC) films and the deposited parameters,DLC films were prepared by radio frequency plasma-enhanced chemical vapor deposition(rf-PECVD) on silicon(100) wafers.Methane(CH4) and hydrogen(H2) were used as the precursors. The effect of the rf po…
The basis function of the Element Free Galerkin method was researched.It can be shown that the shape functions and their derivatives calculated with orthogonal basis function were equivalent to that calculated with polynomial basis function.The matrix was transformed to a diagonal matrix using orthogonal basis functio…
The effects of modification by Ca and hot extrusion on microstructure and grain size of AZ31 magnesium alloy were investigated.The results show that the shape of β-Mg17Al12 spheroidize is obvious with the addition of 0.4% Ca in the alloy,and the grain size reduces from 546 μm to 147 μm after homogenization treatment.M…
The microstructure of the rapidly solidified Cu98Cr2 alloy is studied by SEM(scanning electron microscope) in this paper.The results shows that the microstructure of arc melted Cu98Cr2 consisting of Cr-rich spheroids in the Cu matrix,however,the microstructure of melt spun Cu98Cr2 alloys appears regular lamella eutect…
In order to develop a numerical tool for the fast evaluation of CANDU refuelling schemes,a Linear Sensitivity Matrix method(LSM) is developed.It assumes that all the effects caused by various perturbations to the core state are independent to each other and the core response to a perturbation is proportional to its ma…
Aimed at the close relationship between the applications of crystal silicon(Si) in diode,audion,thyristor and various integrated circuits,the electronic energy band of Si was calculated using density functional theory(DFT) and first-principles pseudopotential plane-wave method.The calculated results show that the latt…
Ti-HMS and Ti/W-HMS molecular sieves were synthesized by varying the ratio of n(Si)/n(Ti) and n(Si)/n(W),and were used for the NH3-TPD analysis.The acidity of the molecular sieve is the largest when n(Si)∶n(Ti)=30∶1,n(Si)∶n(W)=400∶1.Different HMS were used for the oxidation of benzyl alcohol to benzyl aldehyde with 30…