Materials Literature
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Using commercial titanyl sulfate solution as the raw material, porous TiO_ with high photocatalytic activity was prepared by hydrothermal synthesis method. The as-prepared samples were characterized by XRD, SEM, particle size distribution, FT-IR and specific surface area determination, and its photocatalytic activity…
The inhibiting effect of three organic compounds on the corrosion of LY12CZ aluminum alloy in 0.5M H2SO4 solution was investigated.The organic compounds are 2-mercaptobenzoxazole(MBIH),benzotriazole(BTA) and 8-hydroxy-quinoline(8Q).The inhibiting effect to the corrosion dynamics of LY12CZ aluminum alloy in 0.5M H2SO4…
The theory of electrostatic probe method used to measure surface charge distribution is analyzed and a new method used to monitor surface charge on line which is based on generalized electrostatic probe is presented.It shows that when static charge is loaded on the insulator in GIS,voltage signal will be induced on th…
Porous metal foam presents excellent heat transfer performance in forced convection,because it has large specific surface area and good thermal conductivity.A mathematical model of heat transfer in porous metal foam under forced convection conditions was built,and the effects of the porous metal foam height,pore densi…
In order to explore an optimized process for preparing a novel itaconic acid,polyethylene glycol as raw materials were used.The influences of reaction parameters on the esterification rate,such as reactants ratio,time,temperature and solvent,were researched.The optimal reaction conditions for the synthesis were as fol…
With polyether polyol and isophorone diisocyanate(IPDI) as main raw materials,self-made acrylate oligomer(DJW-330) as chemical modifier of waterborne polyurethane(WPU) emulsion,so a modified WPUA(waterborne polyurethane-acrylate) emulsion with well properties was synthesized by self-emulsifying process.The results sho…
This paper reviews recent developments of V microalloying technology and its applications in HSLA steels.Enhanced-nitrogen in V-containing steel promotes precipitation of fine V(C,N) particles,and improves markedly precipitation strengthening effectiveness of vanadium,therefore,there is a significant saving of V addit…
In consideration of the effects of the mass and sizes of primary mirrors on the load sensitivity,mirror processing and the cost of space remote sensors,the necessity of lightweight for primary mirrors in space remote sensors was introduced,and the lightweight technology was comprehensively summarized.The general rule…
The subject entitled The Research and Development of the Rail of the Steels Alloying with Rare Earth in the national 8th Five Year science program and the subject for mechanism study of the rail steels of rare earths in the 10th Five Year program are reviewed.The results of the properties measured by the 8·5 subject a…
Effects of different tempering temperature on the microstructure and mechanical properties of the directly-quenched steel were investigated by SEM,TEM and other experimental methods.The results indicate that the tested steel obtain the best comprehensive mechanical properties with tensile strength of 805MPa,yield stre…
Reactive Powder Concrete(RPC)is a new kind of ultra-high strength cement based compo-site with excellent mechanics performance and durability.In order to make RPC used in structural enginee-ring effectively,size effect on strength of the ultra high strength concrete RPC specimen is experimental studied and the mechani…
ZAO precursors were prepared by a co-precipitation process with additive of PEG-6000 from zinc chloride,AlCl3·6H2O and ammonia solution in a water bath.ZAO powders were obtained upon calcinations.The phase structure,morphology,size and conductivity of ZAO powders were characterized by X-ray diffraction,scanning electr…
Visible reflection characteristics of an on-orbit satellite were studied based on background radiation,surface material properties,orbit parameters,and the relative motion between satellite body and solar array.The Bidirectional Reflectance Distribution Functions(BRDF) of three common surface materials of satellite at…
On the basis of elucidating the status of starch anti-retrogradation research at home and abroad,the mechanism of the short-and long-term retrogradation of starch based on molecular structure was discussed,and the factors affecting the starch retrogradation were also included.Methods used to measure the starch retrogr…
Heat treatment processes were simulated with a thermo-analyse simulator for niobium-bearing low carbon steel (0.028%C-0.25%Si-1.82%Mn-0.085%Nb). In the processes, the samples were cooled down to a final cooling temperature of 350 to 550 ℃ after being normalized at 950 ℃, then reheated at different ratios, and tempered…
A novel polymeric dispersant(SMG) was prepared by modifying copolymer of styrene and maleic anhydride(SMA) with the epoxypropyl trimethyl ammonium chloride(ETA) through interface reaction.Fourier transform infrared spectroscopy(FTIR) indicated that the epoxy groups had reacted with the anhydride groups in SMA to give…
1Cr18Ni9Ti austenitic stainless steel sheet was realized by TIG welding,the influence of welding parameters on the mechanical properties of the austenitic stainless steel welded joint by orthogonal experiments were studied,and the corrosion resistance of the welded joint was also studied.The results show that the opti…
In this experiment,edible films from high-amylose corn starch(HACS) and chitosan(CS) were developed by casting film-solution on leveled trays.The effects of ratio of starch to chitosan,glycerol dosage and methylcellulose(MC) dosage on CO2 and O2 transmission,water vapor transmission(WVT) of edible films were investiga…
This paper introduced CTMP pulping of eucalyptus and aspen mixed chips.Some process parameters,such as impregnation conditions,refining technology,ratio of mixed chips and refining energy,were investigated.The results showed that the brightness and tensile strength decreased significantly with the increasing of eucaly…
Fe-Al oxide magnetic composite nanoparticles were synthesized by sol-gel technique.The multiphase Fe-Al oxide crystallinity of the composite magnetic particles was characterized with X-ray diffraction.The results showed that the larger the mass ratio of Fe to Al2O3,the better the magnetism of the sample under the same…