Materials Literature
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Vinyl benzylchloride-divinylbenzene copolymeric resin was chemically modified with phenol and hypercrosslinked adsorption resins were synthesized.The effect of phenol addition on adsorption of nitrobenzene is discussed.The thermodynamic characteristics of adsorption,the adsorption enthalpy,free energy and entropy for…
A novel low-viscosity vinyl-ended hyperbranched organosilicon resin is synthesized from some chlorsilanes as the main materials in the paper,and its solvent-free insulating varnish also is prepared by mixing alicyclic epoxy resin and methyl nadic anhydride.The structure of vinyl-ended hyperbranched organosilicon resin…
Notch impact toughness is an important dynamic property for applications of metallic materials.Charpy V type notch impact test of AZ31 magnesium alloy was carried out from-80 ℃ to 260 ℃,and the relationship between notch impact toughness and temperature was tested.It is indicated that AZ31 magnesium alloy occurs ducti…
Magnesium smelting industry was a high energy consumption enterprise,and the energy consumption was concentrated in the calcined dolomite and vacuum to restore the two parts of magnesium,while the latter was more prominent.The analysis showed that Pidgeon process magnesium reduction furnace rotary kiln made a large en…
Process of inhibiting silica transfer for magnesium hydroxide was studied,the effect of magnesium addition to properties of wheat straw Soda-AQ pulping and black liquor were analyzed.The performance of scale inhibition of magnesium hydroxide was evaluated.e results is as follow:Al2O3 charge on raw material 2%,magnesiu…
A novel complex,[Ru(bipy)2DAFND](ClO4)2(Ru-DAFND,bipy is 2,2-bipyridine,DAFND is 4,5-diazafluorene-9-p-nitrophenylhydrazone),was synthesized.And it was characterized by IR,1H NMR,ES-MS and elemental analysis.Interaction of Ru-DAFND with calf thymus DNA(ctDNA) was investigated by spectrophotometric and viscosity measur…
The carboxy-methyl starch was prepared by dry synthesis.The paste properties of carboxy-methyl starch were studied.The results showed that carboxy-methylation decreased pasting temperature of corn starch.Compared with corn starch,the paste viscosity of carboxy-methyl starch decreased and the viscosity stability in low…
La2CuO4 nanocrystallites were prepared via a sol-gel process using lanthanum nitrate and cupric nitrate as raw materials and citric acid as complexing agent.The influences of citric acid amount on the phase composition and microstructure of the powders were characterized by XRD,FESEM and TEM.The preparation activation…
Low melting-point lead and tin material were selected andair pressure core-filling continuous casting technologywas adopted to prepare lead-coated tin composite rods with outer layer lead diameter 12 mm and inner layer tin diameter 8 mm.The tri-factor and tri-level orthogonal test were designed on the lead solution te…
The synergistic inhibition effect of N,N′– diphenylthiourea (DPH-TU) and sodium dodecyl sulfonate (SDS) and related mechanism for Q235 steel in 5wt% H2SO4 solution were studied by Tafel polarization curves and electrochemical impedance spectroscopy (EIS). The results showed that the corrosion inhibition effect of DPH-…
The surface of W18Cr4 high speed steel(HSS)was irradiated by high current pulsed electron beam(HCPEB).The surface morphology,structure,elemental composition and the microhardness of the HSS before and after HCPEB irradiation were analyzed by using scanning electron microscope(SEM),X-ray diffraction(XRD),EDS and ultram…
Objective To investigate the effect of different acid solution processing on titanium to enable titanium-porcelain bonding.Methods 40 specimen of pure titanium in dimensions of 25mm×3mm×0.5mm were made and divided into four groups.Compared with the control group,the three other groups respectively processed with diffe…
The polyurethane has attracted much more attentions for its various applications.In this study,the reaction kinetics of isophorone diisocyante(IPDI) and polypropylene glycol(PPG) with using organo-tin compounds as catalysts are investigated by chemical titration.The effects of reaction temperature,different catalysts…
α-MnS nanocrystals were prepared via a novel gas-solid phase reduction route,in which manganese(Ⅱ) sulfate was used as a sulfur source and hexamine as a reducer.The structure,morphology,component and optical property of the as-prepared samples were characterized by X-ray powder diffraction,transmission electron micros…
The temperature dependence of the magnetic properties was systemically studied by dc/ac magnetization and specific heat measurement for heavy rare earth HoCrO3 chromites.The results revealed the existence of complex phase coexistence and competitive magnetic behavior in HoCrO3 chromites.It was found that,in the region…
This paper summarized the categories and source of micro-inclusions in steel,and described the relationships between the magnitude and the granula distribution of the micro-inclusions and refining technologies,and analysed the effects of refining technologies,oxygen content and cooling conditions on micro-inclusions.T…
The electrochemical properties of Ba1.0-xCo0.7Fe0.2Nb0.1O3-δ(B1-xCFN,x=0,0.05,0.10) as a desirable novel cathode material for intermediate solid oxide fuel cells(IT-SOFCs) were investigated.Symmetrical fuel cells with GDC as electrolyte,using simultaneously the same materials B1-xCFN or La0.6Sr0.4Co0.2Fe0.8O3-δ(LSCF)…
In the sol-gel method,furfuryl alcohol and tetraethoxysilane were used respectively as carbon,silicon precursors,polymethylhydrosiloxane(PMHS) was employed as pore-adjusting agent for preparing a carbonaceous silica xerogel.SiC was obtained by the carbothermal reduction of the carbonaceous silica xerogel.XRD,FTIR,SEM,…
This paper introduces the features of the modified mechanical structure of the compact spinning frame for spinning slubby yarn.The EJM128K - SM compact spinning frame added with ZJ -5 slubby yarn device was reconstmcted for 4 rollers compact spinning by using orthogonal test method to optimize the spinning parameters…
With liquid epoxy resin as binder,waterborne amine as curing agent,APP,MEL,PER and CP-42 as intumescent flame retardant system,nano-TiO2 and expandable graphite as synergist,composite iron titanium powder as antirust pigment,fire retardant and anticorrosive coatings for extra-thin steel structure were prepared.When th…