Materials Literature
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A series of mesoporous molecular sieves of AlMCM-41 with different Si/Al ratio were synthesized and Ni supported on AlMCM-41 catalysts were prepared.The effect of reduction temperature,reaction temperature,loading amount of Ni and Si/Al on heptane isomerization were investigated in a conventional fixed bed reactor for…
In this paper,the paraffin styrene coated microencapsulation phase change material(MicroPCM)was prepared by the method of in-situ polymerization.The effect of the stirring rate,the mass rate of paraffin and styrene on latent heat and the microspheres size of MicroPCM was discussed.Under insurance of the formation of m…
The nano-composite polymer CTNI/PMMA thin films are prepared by casting method and their microstructure and optical properties are measured using SEM and UV-Vis-NIR spectrum technique,respectively.The results show that the nano-composite thin film with smooth surface and the average particle size of 150 nm can be obta…
The blended yarn is made of the magnetic fiber and cotton,bamboo fiber,and the performances of blended yarns with different blend ratios are analyzed.The relational equations between the performances and the fiber content are received with 1stopt software,then the blend ratio of the multiple blended yarns is optimized…
Regenerated cellulose fiber is wide in application but easy to be burnt,hence the fire-retardant properties is required.Various flame-retardant chemicals were proposed to add into the cellulose to gain the flame-retardant performance.Nano-SiO2 as a flame retardant was used and the cellulose was dissolved in a complex…
Testing results of the drapability for the fabric were analyzed with the method of main factor analysis.Because many parameters for expressing fabric draping ability were simplified into several main factors in the method,the evaluation system for fabric drapability was simplified.This paper provides an available theo…
The influence of process parameters on hardness of casting-rolling strip of semi-solid AZ91D alloy was studied by experiment.The results indicate that suitably decreasing pouring temperature can increase the hardness of the strip.The hardness of the strip is better with the water cooling than with the air cooling.Afte…
The titanocene dichloride(TDC) was synthesized under mild and reliable conditions in the presence of diethylamine and mixed solvent.The yield of TDC was 78.6%.In this method the production of acidic waste water was avoided by washing product cake with methanol instead of hydrochloric acid,finally the crystals were rec…
In this paper,a method of preparation and mechanism of hollow ceramic microspheres is researched. With Ti-B4C-C as the reaction system,based on traditional principles and flame thermal spray equipment,spray self-reactive compound powders which are treated by the reunion so that could make them occur the self-propagati…
The Gleeble-1500 heat/mechanics simulation experimental machine was used to do double-pass hot compressive test for 40CrNiMo steel,the microstructure character of 40CrNiMo steel's hot deformed austenite at 760 ℃and 950℃,in a strain rate rang of 0.5～30 s-1 and a strain rang of 0.05～0.4 was analyzed.Results indicate tha…
A waterborne iron red epoxy primer was successfully developed by optimized choose of waterborne epoxy resin,combined with the anti-rust pigment,matched with various additives.The paint film has good physical properties,water resistance,and salt-water resistance.The construction period is up to six hours,which can be s…
Sterically hindered alkoxyamine of hexa-atonic cycle compound containing nitrogen is the key intermediate for synthesizing the flame retardant with excellent fire retardancy for the polypropylene fiber. Sterically hindered nitroxyl radical—1-oxyl-2,2,6,6-tetramethylpiperid-4-one was synthesized by using 2,2,6,6-tetram…
This paper introduces the continuous extrusion technology in the copper application.Especially,the technology was applicated in the oxygen-free copper strip,copper busbar,shaped copper busbar,oxygen-free copper rod,contact wire,copper flat wire and other areas.
Attapulgite supported WO_3 (WO_3/AT) catalyst was prepared using impregnation method, using sodium tungstate as the precursor and attapulgite clay (AT) as the carrier, and its structure was characterized by FT-IR and XRD. Catalytic behaviors of WO_3/AT for epoxidation of cyclopentene were investigated using 30% H_2O_2…
A set of 3D thermal-mechanical coupled finite element model was established to simulate the deformation process of tube on 8 stretch reducing mills.The obtained result from simulation is close to the measured results and the biggest deviation is less than 5.2%.Simulation results display deformation process of the tube…
L-Histidine,glucose and their admixture have been pyrolyzed under simultaneous conditions usually adopted in pyrolysis and combustion tests of cigarette paper and its additives,and their applications have been evaluated by analyzing their pyrolytic products using PY-GC-MS series and smoke panel test.The results disclo…
Al2O3thin films were prepared by reactive DC magnetron sputtering with pure aluminum target at different O2/Ar ratios.Exciting and Emitting spectra were obtained by using F-4500 fluorometer.Two peaks generated by the color center coming from the oxygen vacancy were observed respectively around 416 nm and 438 nm.With t…
No matter composite laminates is subjected to static or dynamic load,damage is significantly complex.Accurate modeling for fatigue damage can reveal the damage mechanism of composite laminates.In this paper,based on the cumulative damage theory and stiffness reduction model,fatigue damage of the composite was divided…
In this article the theoretical models of LFMR,recent progress and problems on enhanced LFMR in the two-phase perovskite manganese composites at home and abroad are reviewed. The most simple and effective method for enhancing LFMR is adding a second phase to the parent phase. Combining practical needs and the research…
Reducing temperature rise and preventing static welding should be considered for static electrical contact interface of graphite spark gap switch.In this paper,based on contact surface model and heat-conduction equation,computing model of contact temperature rise is proposed.This computing model can prove that materia…