Materials Literature
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The oxidation behavior of Al_2O_3/TiA1 composites with different Nb_2O_5 contents prepared by hotpressing technology were studied at 900℃in air.The results indicated that with the increase of Nb_2O_5 content the oxidation speed of the composites obviously decreased and the oxidation kinetics obeyed a parabolic law.Aft…
NiTiCu alloys can produce a large force per unit volume and operate with a simple mechanism. For this reasons, it has been widely studied for application as a micro actuator. So in this study, one-way and two way shape memory effects of Ti-42.5at%Ni-2.0at%Cu alloys are studied. In the case of one-way shape memory effe…
The new research technology progresses of novel ethylene,propylene diene tripolymers and ethylene,propylene dienes (as other comonomers excluding ENB or DCPD) tetrapolymers were discussed.This paper describes new EPDM tripolymers synthesized from bridge ring olefins,linear nonconjugated dienes,other dienes and trienes…
The synthesis of an initiator for surface-initiated polymerization was studied.A tethered 2-bromoisobutyrate initiator was prepared by SiO_2 nanoparticles reacted with Hexamethylene diisocyanate(HDI) and 2-bromoisobutyrate bromide.The chemical bonding was characterized by Fourier transformation infrared spectrometry(F…
The manufacturing method of middle steel grade non-oriented electrical steel sheets which have middle tensile yield strength(600 MPa or higher) and high frequency range(W10/400) was summarized.The discussion involves the addition of copper,the cooling velocity control of final annealing,the role of copper,the effect o…
In the dissolved and colloidal substance of DIP,the dissolved substance is the major component;the colloidal substance is the minority.The inorganic composition of DCS in DIP is the key factor resulting in deposition of wood pitch,in which the triglyceride composition is agglomerated and deposited due to the destructi…
We report the determination of the complete set of elastic,piezoelectric and dielectric constants of 0.67PMN-0.33PT crystal by using high-resolution Brillouin scattering in which all experimental data were collected from only one -poled crystal sample.The values of determined constants are similar to those previously…
Objective:It is to fit logarithmic normal distribution model for drug dissolution rate by applying MATLAB software.Method:Norminv(),polyfit()and other commands of MATLAB were utilized to analyze parameters in logarithmic normal distribution model for drug dissolution.Result:The method for the determination of the para…
Mesoporous molecular sieve CoAPSO with MCM-41 structure was synthesized through one-step crystallization and characterized by XRD,TEM,ICP element analysis,nitrogen sorption,UV-Vis spectra and thermogravimetric(TG) analysis.The results suggested that the heteroatom cobalt was incorporated into the pore wall of MCM-41.C…
In actual use of WPC,high temperature obviously affects its various mechanical properties.The study on the creep behavior and stress relaxation property of wood-plastic composites at a certain temperature shows that the creep and stress relaxation of WPC can be reduced effectively by adding reinforcing bars to the pro…
When designing FDF system of compact spinning,the negative pressure drops resulting from spindles at the front and back of the machine should be kept within allowance.For this reason,flow simulation and analysis of FDF on compact spinning is undertaken based onk-etwo-equation model,and the 3-D turbulent flow of the FD…
Using graft reactive extrusion modification technology,prepared oxazoline functionalized acrylonitrile-butadiene-styrene copolymer(ABS)compatibilizer(ABSm),and prepared PA6/ABS/ABSm blends.Mechanical properties of blends showed that moderate ABSm addition can improve the notched impact strength of blends;when ABSm mas…
By one-pot technique the copolymerization of styrene with ethylene promoted by a cyclopentadienyl titanium trichloride(CpTiCl_3)/1,4-butanediol diglycidyl ether(BDGE)/Zn catalytic system to yield aPs-b-P(S-co-E)b-PE block copolymers was investigated via sequential monomer addition strategy in the presence of methylalu…
Based on density-functional theory and the modified fundamental measure theory for the classical fluid, the equilibrium density distribution of charged hard-sphere fluid confined in parallel plates was studied. By comparing the density distributions in the case of with and without applied electric field, the effect of…
220 kV XLPE cables for urban T D lines or power plant construction are mostly installed in cable trenches.It is not a frequent occurrence that multi-cable lines for power plant construction are installed in a tunnel with several changes of direction.In this case it is very difficult to organize and carry out the insta…
The nano crystalline CuO has been prepaired with the water solution of the copper nitrate and ethanol applied as material,and sodium hydroxide,by means of direct precipitator.The effects of ethanol on the crystalline forms and the grain size are analysed and compaired with techniques of TEM,XRD FT-IR and XPS,and the t…
A 2-135 CI engine was modified to carry out the test for combustion and emission control using internal-external exhaust gas recirculation(EGR) by port aspiration and in-cylinder injection of dimethyl ether(DME).The results show that the overall combustion process comprises HCCI combustion,pre-mixing and diffusion com…
The microstructure of layered colossal magnetoresistance material La1.2xNdxSr1.8Mn2O7(x=0.2) was investigated by X-ray diffraction(XRD),transmission electron microscopy(TEM) and high-resolution electron microscopy(HREM).The results showed that La1.2-xNdxSr1.8Mn2O7(x=0.2) is of tetragonal structure and Nd-doping has no…
Lauric acid ester quaternary ammonium salt cationic surfactant 2-hydroxyl-3-cetyl poloxy cetyl dimethyl ammonium dichloride was synthesized by quaternarization of dedocyldimethylamine in acetone with epichlorohydrine(EPIC) and HDAC.Experiment condition was optimized by the method of orthogonal experiment.The yield can…
Automobile exhaust pollution which attracted the extensive attention and importance was getting worse.Currently,as a fourth-generation auto exhaust catalyst,three-way catalyst involved a wide range of research and recognition in the world.This article elaborated the motor exhaust pollution and its control in China,des…