Materials Literature
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A series of SO2-4/SnO2 catalysts(Cat-n,n=5,10,15,20)were prepared by dip-molding in(NH4)2SO4 aqueous solution.The structures were characterized by IR.The catalytic activity of Cat-10 was investigated in the liquid-phase reaction system of benzene nitration.The results showed that the introduction of SO2-4 in SnO2 incr…
In this study,a new type of composite Ag(sliver)/TiO2(titania)/HAP(hydroxyapatite) photocatalyst is prepared for its potential application on organic textiles by combining sol-gel method and heterogeneous deposition method.The photocatalyst structure is provided by x-ray diffraction(XRD) and Fourier infrared spectrum(…
Taking one project basement waterproof as example,it introduces way and construction technology of the basement comprehensive waterproof,and adopts a serious of effective construction technology measures in construction process,reaches ideal waterproof effect,and accumulates waterproof construction experiences.
The electrochemical corrosion behavior of 000Cr25Ni20 austenitic stainless steel in nitric acid solution at different temperatures and in different concentrations were investigated.The results showed that the free corrosion potential of 000Cr25Ni20 stainless steel was shifted towards to transpassive zone and the range…
Ag nanoparticles embedded in soda lime silicate glass were synthesized by an ion exchange and subsequent thermal treatment method.The samples were characterized by scanning electron microscope (SEM),X-ray diffractometer and UV-Vis spectrophotometer.The results indicate that during the thermal treatment the Ag ions nuc…
Most of the representative studies on manganese-containing catalase models were reviewed in recent years.The catalytic mechanisms of the manganese catalase models were discussed in order to understand the structural features of high active mimics.
Mo-La2O3 powder was produced by liquid-liquid doping and liquid-solid doping respectively.Mo-La2O3 rods with a diameter of 17 mm were sintered at 1 840 ℃ for 6h in medium frequency induction furnace.The size distribution and feature of dopant particles and the fractographs of Mo alloys were investigated by TEM and SEM…
An investigation on the structural transformation of ZnS under high pressure is conducted using first-principle calculation based on density functional theory(DFT) with the plane wave basis set.Our results demonstrate that the sequence of the pressure-induced phase transition of ZB-ZnS is from ZB-structure to the RS-s…
SnxSy thin films had been prepared by a two-step process.This process included the deposition of Sn thin films on glass substrates by thermal evaporation and sulphurization of Sn thin films for 30~60 min in a vacuum condition at different temperatures of 150~300 ℃.Their microstructures,composition and morphology at di…
Anodization of titanium in a fluorinated glycol and H2O electrolyte was investigated.The prepared anodic film had nanotube-array architecture with 0.9-36 μm tube length.We discuss in details the influence of anodic voltage,anodic time and electrolyte composition on the structure of titania nanotubes.The result showed…
In response to the question that whether jute fiber can be used to replace low-end flax fiber and its potential commercial applications,the paper discusses the features of cotton /jute fabric and compares it with flax /cotton fabric.One kind of flax /cotton blended yarn and five kinds of jute /cotton blended yarn with…
By using software GT-COOL,established was a one-dimensional simulation model for a 30 kW proton-exchange membrane fuel cell engine cooling system.The model in question is mainly composed of a fuel cell stack,water pump,fan and radiator sub-model.By utilizing the model under discussion,simulated were the heat dissipati…
The tension,impact and drop welght tesring(DWT) tests were perfomed on X80 pipeline steel for the 2nd west-east gas pipeline project.Obvious fracture separation was found on the fracture surface of the sample.The fracture separation reason was investigated by using electron backscatter diffraction(EBSD) technique to a…
Real-time dendrite growth of Sn-Pb binary alloy was observed with diffraction-enhanced imaging method at Beijing Synchrotron Radiation Facility(BSRF),and a series of time-sequenced images of the growth behavior and morphology evolution of dendrites were successfully obtained.These can offer the direct proofs to verify…
Degradation of aniline in water by the ultrasound/zero-valent iron system (US/Fe0) was explored.The effect of Fe0 dose,initial pH value and initial aniline concentration on the oxidation process and the degradation efficiency was studied.The results indicated that degradation efficiency was found to be the largest whe…
The effects of melt and mold temperature on interfacial morphology and properties of over-injection molded polypropylene were investigated in this article. The morphology at the interfacial region of over-injection molded specimens at different melt and mold temperature was observed by polarized light microscopy (PLM)…
Bisneopentyl glycol dithiopyrophosphate (BGDTP) flame retardant was synthesized by reacting neopentyl glycol with thiophosphoryl chloride as raw material, dimethylbenzene as solvent, pyridine and triethy-lamine as deacid reagent. Compound BGDTP was characterized by FTIR, 1H NMR and MS, The thermal properties of compou…
Multi-way loading forming process of a tee-joint valve is a complicated hot forming process under coupled effects of multi-parameter,multi-step and multi-die constraint.The crack is prone to occur due to the complex stress state,material flow behavior and severe inhomogeneous deformation in the forming process.Firstly…
Epoxy curing agent is the most important additives to determine the performance of epoxy adhesive.Mannich alkali curing agent is one of the key amine modified epoxy curing agent which is used at room temperature,but the disadvantage of poor toughness limits the application of such curing agents.Based on the Mannich re…
CO2 gas shield welding is used in the production due to a great deal of profiled bar steel employed in the truck wheel,but it also produces varies kinds of welding defect such as blowhole,undercut,deviation,uncompleted weld etc.The defect influence factors in the weld production of truck wheel were analyzed from the d…