Materials Literature
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In order to study the effect of byproduct on the catalytic hydrolysis rate of sodium borohydride as well as the volumn of hydrogen generation and performance of catalyst,the ruthenium catalyst loaded on 717 anion exchange resin was prepared by the impregnation method,hydrogen generated by catalytic hydrolysis of sodiu…
It is necessary to study and improve the modulation characteristics of Liquid Crystal Modulator(LCM) because of its wide application.A logarithm driving signal model is proposed to linearize the phase response of LCM between 0 and π.Furthermore,it is found out in the experiments that the degree of phase response linea…
Highly C-axis oriented nano-ZnO thin film was manufactured by RF-magnetron sputtering technique on a normal glass base.The influence of the heat treatment temperature on the ZnO thin film's morphology,microstructure and the residual stress is studied by the Scanning Electron Microscope and X-ray diffraction apparatuse…
Polyvinyl acetate(PVAc) was prepared by mini-emulsion polymerization of vinyl acetate with azobisisobutyronitrile(AIBN) as initiator,and sodium dodecyl sulfate(SDS)/cetyl alcohol(CA) as surfactant/consurfactant.The effects of the initiator concentration,temperature,hydrophobe and VAc/H2O ratio on conversion were inves…
The compression mechanical behaviors of moulded pulp materials were experimentally studied in details.Results indicate that both material's density and loading speed have effect on its mechanical properties.With the increase of material's density,elastic modulus and ultimate strength also increase.With the increase of…
The study analyzed the water intercepting effect of free-field pressure and the ship hull pressure of the impact load with ship hull,obtained the free-field pressure equation with water intercepting effect and the ship hull wall pressure approximate equation,and contrasted it with the measuring result of underwater ex…
This paper reviews three hydrolysis methods of polyacrylonitrile fiber and the wide applications of hydrolysis products in the ion-exchange fibers, flocculants, super absorbent polymers, oil blocking agent, the functional fibers, as well as the hydrolysis of polyacrylonitrile fibers and recycling of acrylic to enhance…
The effect of solid solution and solid solution plus aging treatment on the microstructure, conventional mechanical properties and high cycle fatigue behaviors of cast AZ91D magnesium alloys were investigated. The results show that the tensile strength, fatigue strength and elongation of cast AZ91D magnesium alloy are…
Coordinate structure hybrid excitation synchronous machine(HESM) is an important type of hybrid excitation machine.Axial flux leakage between the permanent magnetic part and electrical excitation part is pointed out and studied in this paper.Then,considering the special structure and 3-Dimensional characteristic of fl…
The dynamics laws of the film growth under constant current mode in two kinds of electrolytes were studied to explore the technics of micro-arc oxidation (MAO) for AZ91D die-casting magnesium alloys. The effects of constant current density value,impulse frequency of power as well as the addition of NaF in electrolytes…
Magnesium hydroxide(MH),which was modified by silicon oil,was filled into polypropylene as a fire retardant.Comparison was made with untreated and treated PP/MH composites.The effects of modification agent on the flammability,the crystallization and thermal stability of PP/MH composites were studied by limiting oxygen…
Key electrochemical materials are the most important factors for cost reduction and commercialization of proton exchange membrane fuel cell(PEMFC).In this paper, domestic key materials for fuel cells including graphite fiber carbon paper, perfluorosulfonic acid proton exchange membrane and Pt/C catalyst were utilized…
The insulation of power transformer plays a vital role in its safe operation. On the basis of the aging chemical reaction of insulating paper, by characterizing the degree of polymerization (DP) of cellulose paper, the kinetics of chemical reaction is employed to evaluate the aging lifetime of power transformers, and…
Based on Mn-Mo-Nb system with three different content,the effect of finishing rolling parameters and rolling temperature as well as the content of C and Mo on yield strength and DWTT shear area values of X80 hot strip pipeline steel were investigated.The results are of practical significance to improvement yield stren…
Novel biodegradable poly(5-hydroxylevulinic acid-co-D,L-lactic acid)(PHLA-DLLA) was synthesized via melt copolycondensation of 5-hydroxylevulinic acid(5-HLA) and D,L-lactic acid(DLLA) and characterized with gel permeation in chromatography(GPC),Fourier transform infrared spectroscopic(FT-IR) and differential scanning…
The finite element method was employed to simulate the crack growth behavior of ceramics matrix composites.The model used the combined elements for simulating the separation between matrix and fiber and the contact elements for simulating the friction between matrix and fiber,considering interfacial bond strength on t…
tanium powder, graphite powder and copper powder were accurately weighed, mixed and milled to attain different Ti/C ratios in moles. The powder mixture was added into the melting copper after pressed into compact. The high temperature of the melting copper makes the titanium in the compact react with graphite drastica…
Objective To determine the short-term and long-term distribution of nano-Fe3O4 and nano-TiO2 in mice.Methods Nano-Fe3O4 and nano-TiO2 were injected into abdominal cavity of the mice and their contents in the tissues were detected by AAS and ICP-OES,respectively.Meanwhile,histopathological evaluation was carried out.Re…
The specific heat capacity of carbohydrazide perchloric acid energetic coordination compounds was studied by differential scanning calorimetry (DSC). The specific heat capacity of [Co(CHZ)3](ClO4)2 was mensurated at 50-140 ℃ and the specific heat capacity of [Mn(CHZ)3](ClO4)2,[Zn(CHZ)3](ClO4)2 and [Ni(CHZ)3](ClO4)2 wa…
Powder X-ray diffraction(XRD)is a non-destructive forecasting and analysis technique with the widespread applications.During the experiment teaching,the phase composition of the sample was analyzed by XRD.The purpose of the experiment is that the constitution and the principle of XRD analyzer are introduced to student…