Materials Literature
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The phosphating coating were obtained by zinc phosphating system on LY12 aluminum alloy under medium temperature.Corrosion resistance of the coating was investigated by copper sulfate titration and electrochemical tests,surface morphology and composition of the coating were observed and determined by SEM and EDS respe…
4,4′-Thiodibenzenethiolhexanediol diacrylate(TBHDA) was synthesized via the thiol-ene reaction between 4,4′-thiodibenzenethiol and 1,6-hexanediol diacrylate.For comparison,the thiophenol modified di-trimethylolpropane tetraacrylate(TP-DiTMP4A) and hyperbranched acrylate(TP-P1000A) were also synthesized.The molecular s…
AlN/20%(volume fraction)h-BN composites were fabricated by pressureless sintering at 1 700 ℃ for 2 h.The samples were respectively impregnated into two impregnants of A10 alumina sol and silica sol/phenolic,and then heat-treated at 1 450 ℃ for 2 h in nitrogen atmosphere.The relative density,Vickers hardness,flexural s…
The effect of anti-aging system on properties of chlorinated polyethylene(CM) and nitrile rubber(NBR) blends were investigated.The results showed that adding antioxidant reduced the cross-linking efficiency.The blends had better anti-aging properties with RD and NBR as antioxidant.When the antioxidant RD dosage was 1~…
In the production process of the continuous caster in one's steel company,the bolts which connect the driving rolls with cardan shafts often loosening,caused the driving load distribution is not balanced and the transmission is unstable.This article analyzed the major causes to the poor stabilization of the sector sec…
Heat coefficient was studied between FCC catalyst and FCC naphtha in a heat-exchange system of gas-solid revamped by a fixed fluid bed reactor.The effect of naphtha flow rate,wind rate and catalyst bed temperature were investigated.It is revealed that the heat coefficient gets smaller as the naphtha flow rate increase…
This article,which base on conventional rigid PCB process,introduced a new process method of the symmetrical closed rigid-flex PCB through expatiating on several key process,and generally explained the realizable course of the process,which have brought about industrialization,mainly focuses on process design,manufact…
The molecular structures of the ground state of complexes CuL2 and its anion were optimized on the level of density functional theory(DFT B3LYP).The charge distribution and the infrared spectra of these molecules were analyzed.The electronic spectra of the above structures were obtained by the time-dependent density f…
4-(Hydroxymethyl)-2-(4-(hydroxymethyl)-1H-benzo[d]imidazol-2-yl)phenol was synthesized from 2-methyl-6-nitroaniline and salicylaldehyde and characterized by 1H-NMR,UV and FL.The fluorescence quantum yield of the target product was 0.21 and the Stoke's shift was 126 nm.It was found that Co2+ has better fluorescent quen…
According to fundamental parameter method theory,gained the key parameters such as mass-absorption coefficients and excitation factors and wrote the calculation procedure.In experiment,a series of lead brass alloy standard samples were analyzed with an energy dispersive X-ray fluorescence spectrometer and calculated t…
The refractory aggregates are composed of 40% silica flour and 60% bauxite,which were sintered constantly at 1 400 ℃ and 1 500 ℃,the BST 401 bending strength tester was used to test the bending strength of sintered samples,comparing with the single silica flour aggregate,and the sintering mechanism of the refractory a…
The micro-structured WC-10Co4Cr coatings were deposited by the high-velocity oxy-fuel(HVOF) spray process.The microstructure and sliding wear behavior of the coatings were respectively characterized by optical microscopy,scanning electron microscopy(SEM),X-ray diffraction(XRD) and sliding wear test.The results show th…
Continuous cooling transformation(CCT) curves of austenite in a low carbon steel containing boron without and with deformation of 40% at 900 ℃ were constructed by means of thermo mechanical simulation on a Gleeble-2000 simulator and Vickers hardness measurement.Influence of cooling rate and deformation process on the…
Ultra-fine magnesium oxide powders were obtained via direct precipitation process,during which the industrial pure MgSO4·7H2O(originate from szaibelyite) and(NH4)2C2O4 were employed as raw materials.The mechanism and factors that influenced the quality of final produce,such as reaction concentration,feeding fashion,an…
The thermal degradation kinetics of the polypropylene(PP)/carbon nanotube(CNTS) composites was studies by thermo gravimetric analysis at different heating rates.The activation energies and correlation coefficients were calculated by Kissinger and Flynn-Wall-Ozawa methods.The results of TG and DTG indicated that there…
The characteristics of the reaction of alkyl organotin halide with mercaptoacetic acid in the presence of organic amines was studied.The alkyl type and number had a great impact for the structure of the product.A Sn—Ph bond cleavage occurred in the reaction when the three alkyl organotin halide containing phenyl.The m…
Thermal weight loss curves of bio-oil/ethanol blends were determined by TG-DTA method in the oxygen atmosphere,kinetic parameters were calculated by both the Achar differential method and the Coats-Redfern integral method,and the properties of blend fuel pyrolysis chars were also tested.The thermogravimetric cures of…
The study investigated the physiochemical properties of myofibrillar protein from silver carp,yellow croaker and blended myofibrillar protein composed by 50% silver carp protein and 50% yellow croaker protein during heat treatment.As the temperature rose,turbidity of three kinds protein solution increased by S-shape c…
La4/5Sr1/5MnO3 and its doped samples with respective doping of K and Ag at A-site were prepared by the solid-state reaction method.The influences of the radius rA and disorder degree σ2 of A-site ions on electric transport property and magnetoresistance of the perovskite manganite system with unchanged value of Mn3+/M…
The Chinese water chestnut peel dreg was modified through epoxidation and amination to prepare a new dye sorption agent.The effects of temperature,pH and concentration on dye sorption were studied.The results showed that the absorption effect of modified products with dye waste was significant at the concentration of…