Materials Literature
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The influence of heat treatment process on mechanical properties of ZA35-3.5Mn alloy prepared by spray deposition process were studied by orthogonal analysis.The results showed that with the increased solution temperature and prolonged solution time,the tensile strength and hardness obviously raise.As the aging temper…
A monomer with chelating group that can form five-membered ring with metal ion was synthesized by acrylic amide,etc.The effect of dosage of catalyst,mass ratio,reaction temperature and reaction time on production yield was studied by orthogonal experiment.The scale inhibition rate of polymer formed by the monomer was…
The effects of different factors including concentration ratio of carrageenan and myofibrillar protein,pH,ionic strength and [K+] on the textural properties of the carrageenan-myofibrillar protein mixed gel were studied.The results showed that the factors which affected the hardness and adhesiveness of mixed gel were…
It has established the FEM model of nine horizontal roller straightening for 60kg/m heavy rail with original curvature,and simulated the process of the nine horizontal roller straightening by using the explicit dynamics software ANSYS/LS-DYNA.Study on the size and the distribution condition of heavy rail residual stre…
A nondestructive method for measuring the thickness of the semiconductor material of 4H-SiC epitaxial layer by stacking faults was introduced.It is based on the characteristic of the relationship between the size of stacking faults (SF) and the thickness of epitaxial layer.The thickness of epitaxial layer can be calcu…
To meet the national Ⅳ emission standards for diesel engine, the two optional exhaust gas purification techniques are discussed, leading to the conclusion that the SCR technology is more suitable for the market development in China. The composition and working principle of the SCR system with compressed air assisted i…
VO2 thin films were prepared by RF magnetron sputtering and annealed in argon atmosphere.The phase structure,components and surface morphology of vanadium oxides nanofilms were characterized by laser Raman spectroscopy,X-ray photoelectron spectroscopy(XPS) and scanning electron microscope(SEM).The results showed that…
The effect,of temperature and cooling manners on the oxidation and decarburization behavior of spring steel 55SiCr were investigated by optical metallograph,microhardness and SEM.The results indicate that the oxidative loss of 55SiCr steel increases with temperature increasing;and the total decarburization depth is a…
Through suspension polymerization,with cetane methacrylate as monomer,the high oil-absorptive acrylic resin was synthesized.The influences of different crosslinking agents,initiator,disperser and reaction temperature,reaction time on the oil absorption rate of high oil-absorptive resin were studied.The oil absorption…
The effect of the Si content on magnetic properties for nanocrystalline Fe87-xCu1Nb3SixB9 alloys annealed in different methods has been investigated. It was found that the magnetic properties of Fe87-xCu1Nb3SixB9 alloys annealed in normal methods were obviously improved with the increasing Si content. Annealing under…
The blood biochemistry index and mineral element content in hair of Longdong cashmere goat were determined based on clinical observation to propose the supplementary feeding scheme of mineral elements for Longdong cashmere goat according to the special soil status in Qingyang region.The results showed that there was s…
Mono-crystalline silicon(c-Si),thin films of amorphous silicon(a-Si) and nano-crystalline silicon(nc-Si) were irradiated at room temperature(RT) by using 94 MeV Xe-ions at 1.0×1011,1.0×1012 or 1.0×1013 Xe-ions/cm2,respectively.All samples were analyzed at RT by an UV/VIS/NIR spectrometer (Lambda 900,PE,Germany),and th…
Obtaining high quality protein crystal is one of the bottlenecks of structural determination by X-ray crystallography.Crystallization process of protein is affected by many factors.Temperature is an important factor for protein crystallization,but it does not attract much attention in practical crystallization.The pas…
The ytterbium doped gadolinium gallium garnet (Yb3+∶Gd3Ga5O12,Yb∶GGG) nano-crystalline powders were prepared by the homogeneous precipitation method using Yb2O3,Ga2O3,Gd2O3 as raw materials,ammonium bicarbonate (NH4HCO3) as precipitator,and ammonium sulfate ((NH4)2SO4) as dispersion medium.The precursor and calcined n…
The exhaust treatment method in polycrystalline silicon production is addressed in this paper.SiHCl3,HCl and H2 can be recycled after extractive distillation of the by-products.Furthermore,the treatment methods about SiCl4 and SiH2Cl2 are elaborated.Results showed the by-product SiCl4 can be treated by zinc reduction…
Low harmonic distortion MnZn ferrites were prepared by conventional oxide ceramic process to improve the network transmission quality of asymmetric digital subscriber line(ADSL) access system.The relationship of magnetic characteristic and ZnO content in low harmonic distortion MnZn ferrite was investigated with const…
The expression pattern of calcitonin gene-related peptide(CGRP)in the duck bursa of fabricius during the embryonic and post embryonic development was studied by the immunohistochemical method.The results showed that CGRP-positive cells with strong reaction were detected in the interfollicle epithelium(IFE)(from 20days…
Microencapsulated ammonium polyphosphate (MCAPP) with an epoxy resin shell was prepared by in situ method. The impact of epoxy resin (EP) content on water solubility of MCAPP was studied. It is found that the water solubility of MCAPP at 25 ℃ and 80 ℃ is much lower than that of APP,and it decreases gradually with the…
Expanded graphite holds the higher resistance without the modification by the special technology.The resistance of expanded graphite will reduce when the addition agent with the higher conductivity is put into the expansible graphite.The applied range of expanded graphite is extended through the modified study of expa…
Zn-ZnO nano-structures were prepared firstly by electrochemical deposition technology and then annealed at different temperatures in air.The prepared samples were characterized by means of XRD,SEM and PL spectroscopy.Based on the analysis and discussion on the testing results,it can be seen that the annealing process…