Materials Literature
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The traditional chromate chemical conversion solution is usually to deal with toxic and carcinogenic hexavalent chromium,in order to protect the environment and achieve human sustainable development,the scientific and technical personnel at home and abroad make recently a lot of study for new magnesium alloys chromium…
Band structures and densities of states on LiMn2O4 has been investigated by first-principles calculations with ultra-soft pseudo-potentials plane-wave method based on the density functional theory and the total energy of primitive cell of LiMn2O4 was calculated.The calculational results indicated that the cathode mate…
Heavy metals in electrolying manganese industrial wastewater have high toxicity and are impossible to be degradated biologically.The concentrations of ions in the wastewater are higher,the standards of wastewater disposal have been carried out more strictly.Thus the wastewater discharge has turned into a diffcult issu…
Galvanized steel sheet was blackishgreen colored passivated in tetracid solution system with acetic acid solution as stabilizer and silver salt solution as toner.The micro-morphology of the film before and after passivation was observed by SEM.The composition of the film was tested by EDS and its phase compositon was…
LiNi0.5Mn1.5O4/C composite was prepared by the solution deposition-vacuum pyrolysis method using LiNi0.5Mn1.5O4 and sucrose as raw materials.The microstructure,surface morphology and electrochemical properties were characterized by various electrochemical methods in combination with thermogravimetric (TG) analysis and…
Catalyst is the key to the selective catalytic reduction (SCR) of NOx, and its catalytic performance directly affects the removal effect of NOx. The SCR technology, principle of SCR for de-NOx in flue gas, the effect factors of process, the type of SCR catalyst and reaction characteristics are introduced. Low-temperat…
In this investigation,nano-hydroxyapatite particles have been synthesized by calcium nitrate and diammonium hydrogen phosphate by using polyethylene glycol as a template under cryogenic and ordinary pressure.The structure and morphologies of resultant samples were characterized by X-ray diffractometry(XRD),Fourier tra…
Perovskite-type Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCFO) powders were synthesized using two methods, solid-state reaction (SSR) method and cit-rate-EDTA complexing method (CC-EDTA). Then the powders were pressed to green disks of 19 mm in diameter and sintered at 1140°C for 5 h. The shrinkage rate and relative density of the…
The principle and technology flow of the static powder coating spraying were introduced,the main influence of product quality was investigated form power coating and spraying technics.Orthogonal test of static spraying voltage,feeding power air pressure,solidifing temperature and time had been carried in order to obta…
CMC+PTFE,HPMC and HPMC+PTFE were used as binders and the effects of the binders on the positive electrodes properties of Ni-MH were investigated by the electrochemical measurement,SEM and EDS methods,individually.For the single added HPMC electrodes,the discharge capacity are increased,the high rate discharge and high…
The changes of electrical characters of carbon nanotubes with adsorbed adenine have been studied.The mechanism of adsorption has been analyzed by studying the Raman spectroscopic of adenine on the carbon nanotubes.The result indicated that the electric conductivity is reduced after carbon nanotubes adsorbed adenine.Mo…
Based on two kinds of silver powder with different morphology and three matrixes with different curing shrinkage,six electrical conductive adhesives(ECA) were prepared.The effects of the curing shrinkage of matrix and the morphology of silver powder on the resistivity of the ECA were studied.The conductive mechanism o…
According to comprehensive analysis of expansive agents industry for concrete in China, the future direction of expansive agents is to develop the kind of expansive agent with CaO, as the main expansion source. This kind of expansive agent has the character of low dependence on curing water, and can save a lot of high…
Disadvantages of 60mm wire-line coring drilling rod in medium-deep inclined hole drilling include: low mechanical strength,poor wear-resistance and inconvenient drilling rod disassembling.Quenching and tempering treatment was adopted to wire-line coring drilling rod,the mechanical strength was greatly improved;high-f…
Analyze through the application of the factor influencing water pump efficiency and ultra slippery metallic coating performance, studying utilizes the ultra slippery metallic coating to carry on reducing energy consumption to the old water pump, improve the operational efficiency of the water pump. It is tested throug…
The amino trimethylene phosphonic acid(ATMP) was added to the passivation zirconium-titanium aqueous solution to form the passivation films on AA6061 aluminum alloy through dipping treatment for anti-corrosion.The influence of ATMP on the corrosion resistance of the passivation films in 3.5%NaCl solution was studied b…
TiB2/Al-7Si composite was synthesized by salt reaction route.The microstructure of the composite was observed,and the mechanical properties were also tested.The results show that in-situ TiB2 particles have the average size of about 400 nm,and uniformly disperse in the matrix.TiB2 particles have a significant effect o…
Ceramic coatings on metallic substrates have increasing application in industry due to enhanced mechanical properties and corrosion resistance of the ceramic coatings.In particular,the SiC/Al2O3 composite coating is desirable since it could offer both high wear resistance and chemical stability at both room and high t…
A numerical simulation method was used to study the turbulent flow,heat transfer coupled with the molten steel solidification and inclusion movement in mold.The results show that due to the strong jet impingement on the narrow face in mold,solid shell near the impingement point is very thin.Inclusions tend to float up…
Skutterudite compounds Na-filled CoSb3 were successfully synthesized at high-pressure using powders of Co,NaN3 and Sb as starting materials.The X-ray diffraction(XRD) results indicate that all samples have the single phase CoSb3.No secondary phase is found when Na content wNa≤80%.The composition-dependent electric tra…