Materials Literature
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Due to its outstanding physical and electrical properties,graphene has become one of the hot research topics and frontiers in the fields of physics and semiconductor electronics.The physical and electrical properties of graphene were briefly introduced.A comprehensive review was presented to the current research activ…
Factors affecting CO shift-conversion reaction in ammonia plant are analyzed and aiming at the retrofit of CO shift-conversion unit in ammonia plant of Sinopec Baling the features of this retrofit of process technology are introduced and the economical benefit after the retrofit analyzed.
By analyzing the mechanical properties,surface morphology,chemical structure of untreated wool fibre,fibre after ultrasound treatment at 55℃ and boiling treatment,the effect of ultrasound treatment on wool properties was discussed,the mechanism of ultrasonic dyeing in low temperature was investigated.The results showe…
With the component design ideas of low carbon composite added with microalloying elements Nb and Ti,and fine-grain strengthening,transformation strengthening and precipitation strengthening were used,the 780 MPa grade heavy-duty beams steels were carried out on a domestic factory 1 750 mm semi-continuous hot rolling m…
We proposed a facile and rapid method for preparing silica-silver core-shell(SSCS) substrates to use Ag electroless plating on SiO2@Au-seed particles. UV-Vis-NIR absorption spectrometer and SEM were employed to monitor the reaction process of the formation of Ag on the surfaces of silica beads, and the optical resonan…
Research progress in carbon dioxide emission reduction technology at home and abroad were reviewed,carbon dioxide separation methods and emission reduction technical route were discussed primarily,resource utilization and sequestration technology of carbon dioxide were introduced briefly,and the development trend of c…
Objective:To investigate the effect of middle layer by electro-spark deposition(ESD) technology on bonding strength of titanium and porcelain.Methods:Forty pure titanium specimens with the size of 25mm×3mm×0.5mm were randomly divided into four groups(n=10) according to four different surface treatments:untreated contr…
η phase powders were prepared from cast tungsten carbide and cobalt at low temperature,the η phase powders and the carbon were mixed by ball milling and followed by pressing,then coarse cemented carbide were prepared by reactive sintering at 1 450 ℃ in vacuum.The influence of the sintering atmosphere and sintering tem…
Structure of chitosan was introduced.Some main modification methods for preparing of chitosan derivatives,including etherification,oxidation,acylation,crosslinking,alkylation,graft copolymerization,quaterization and recombination with other materials et al were focused.Applications of chitosan and its derivatives in w…
Nearly spherical Ag/Au core/shell nanoparticles with good monodispersity and stability were synthesized in aqueous solution by seed growth method using gallic acid as reductant and stabilizer.High resolution transmission electron microscopic(HRTEM) image and energy dispersive X-ray spectrometry(EDX) showed complete co…
The paper introduces the practices that Shanghai Municipal Electric Power Company(SMEPC) has conducted to enhance the credibility of the XLPE cables.Based on the broadband electromagnetic coupling technology and ultrasonic testing technology,an acoustic-electric combined method is proposed to test the on-site check,da…
Rapidly solidification / powder metallurgy(RS/PM) Mg-6Zn,Mg-6Zn-5Ce and Mg-6Zn-5Ce-1.5Ca(wt%) alloys in the form of rods were prepared by hot extrusion.The compressive deformation behavior of the magnesium alloy was studied at the temperature range of 25 ℃～300 ℃ and initial strain rate of 5 × 10-4 /s.The results show…
According to GB/T4334-2008 Corrosion of metals and alloys-Test methods for intergranular corrosion of stainless steels,the corrosion phenomenon of 321 and 310 austenitic stainless steel welded with A132 and A402 electrode,respectively,was analyzed.The results show that the intergranular corrosion resistance of 321 aus…
The transparent and hard SiO2/organosilicone hybrid coatings were prepared on polycarbonate(PC) with tetraethoxysilane(TEOS),methyltriethoxysilane,dimethyldiethoxysilane and 3-(methacryloxypropyl)-trimethoxysilane as the main raw materials by the sol–gel method.The structure and properties of the hybrid coating were c…
Novel bismaleimides containing phthalazine biphenyl(PPES-BMI) with different polymerization degrees were synthesized by the reaction of maleic anhydride with poly(aryl ether sulfone) prepolymer(PPES)containing phthalazinone prepared from 4-(4-hydroxyphenyl)-2,3-phthalazine-1-one(DHPZ).The structure of PPES-BMI was cha…
Numerical simulation approaches to subcooled boiling and their application to EAST plasma facing components(PFC) was described.A two-fluid model implemented with a wall boiling model based on a wall heat flux partition algorithm was used to solve control equations for mass,momentum and energy,which coupled with additi…
In order to estimate operating stability of superconductors and permanent magnets in high temperature superconducting motor(HTSM),it is necessary to calculate the temperature distribution in HTSM accurately.In this paper,the thermal performance of a fully superconducting motor was investigated.The 2-D sinusoidal time-…
Nano-manganesedioxide was prepared by chemical deposition in aqueous solution for the application as catalyst for oxygen reduction in air cathode.The morphology and structure were characterized by SEM,XRD and XPS to investigate the effect of reaction conditions,such as temperature and time,on the crystal morphology an…
The finite element simulation about pure copper deformation during twist extrusion(TE) was carried out by the simulation software MSC.Marc,the procedure steps of TE,the distribution of effective strain and the change of strain component were analyzed.The experiment about pure copper at room temperature during TE was c…
Luminescence property of SrAl2O4∶Eu2+,Dy3+ phosphors in different temperatures between 100 K and 500 K was studied in this paper.The results indicate that fluorescence and after glow intensity take on linear change in certain temperature range and obtain perfect luminescence property at the temperature of thermo-lumin…