Materials Literature
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A series of ZSM-5-based catalysts with different reaction durations,i.e.fresh,used for 48h,used for 650h,used for 650h and then regenerated,as well as the regenerated one reused for another 48h,were characterized to investigate the factors that influence the stability of ZSM-5-based catalyst for the conversion of C4 o…
In view of worn failure at high temperature for cylinder of high-power density diesel engine,the sulfurizing layer was prepared on the laser quenched 42MnCr52 steel surface by low temperature ion sulphurizing technology.The surface morphologies,phase structures,mechanical properties and high temperature wear resistanc…
The steady flow field and chemical reactions in a duel-chamber regenerative thermal oxidizer (RTO) were studied with the CFX software. Flow circumstances in the duel-chamber RTO were described by numerical simulation. Some influencing factors such as combustion temperature, the mass concentration of volatile organic c…
Single-crystalline orthorhombic CoV2O6·2H2O nanobelts was large-scale prepared through a hydrothermal method without any templates or surfactants.The corresponding dehydrated salt of monoclinic CoV2O6 was prepared by the subsequent sintering treatment.The products were all collected and characterized by XRD,FESEM,TEM,…
Ni-Al2O3 nano composite coatings with high concentration of Al2O3 nano particles were prepared by electrophoretic/DC electrodeposition and electrophoretic/pulse electrodeposition.The effects of Al2O3 concentration on the surface morphology and microstructure of the nano-composite coatings were analyzed.The corrosion r…
Sulfur-triphosphazene composites as cathode for lithium batteries was synthesized by nucleophilic substitution,and coin cells were assembled with metal lithium as anode.The prepared material was characterized by IR spectrum and XRD test.The results showed that the material was a mixture of triphosphazene and sulfur an…
CFD numerical simulation is performed to investigate the flame speed mechanism over a stone curtain wall.The PMMA thermal insulating layer of the wall is 4 cm thickness,and a 2cm gap exists between the thermal insulating layer and the outside steel plate.An external hot plane ignites the PMMA inside the stone curtain…
Based on spin-polarized density functional theory we studied the electronic structures, magnetic and optical properties of Ni-doped ZnO nanowires.The magnetic results show that three magnetic coupling states are present:ferromagnetic(FM),antiferromagnetic(AFM),and paramagnetic (PM) states for the six kinds of Ni-doped…
On the basis of the study of thermal behavior of ammonium dinitramide(ADN) and the interaction between ADN and NC,the influences of stabilizers,such as N-methyl-p-nitroaniline(MNA),1,3-dimethyl-1,3-diphenylurea(C2),2-nitrodianiline(2-NDPA),hexamethylenetetramine(HMT) and its complex MNA/C2,MNA/2-NDPA and MNA/HMT,on th…
Hydroxyapatite/thermotropic liquid crystal polymer(HA/Vectra A950) composites were processed with optimized parameters.When the HA/Vectra A950 mass ratio is less than 10/100,the composite exhibits a core-shell structure.The HA particles are mainly dispersed in the core part,while the skin layer is composed of highly o…
Iron-based alloy coating reinforced by precoated SiC particles was prepared by plasma surfacing process with SiC back-feeding model.SEM,XRD and EDS were used to analyse microstructure,phases and elemental distribution of the coating.The results show that the precoated SiC particles were not dissolved significantly.The…
In order to improve the dispersivity of silver powders,highly dispersed ultrafine silver powders were prepared from silver nitrate by chemical reduction method with ascorbic acid as the reducing agent and polyacrylic acid as the dispersant.The effects of pH value,temperature and dispersant dosage on the mean particle…
In this paper,based on the finite element analysis software ANSYS/LS-DYNA,stress field of CADI grinding ball during the falling ball test with a single drop was simulated.The results show that the peak value of shear stress appears in the area slightly deviated from the center of the contact interface while the maximu…
Mechanical behavior and microstructure evolution of Mg alloys during compression,tension,rolling and extrusion were reviewed.Different types of twinning and twin variants formed in Mg alloys under different deformation conditions,especially double extension twins,were reported.Based on the understandings of dislocatio…
Rod-like nano ZnO photocatalysts have been prepared in a controllable hydrothermal process.The resulting particles were characterized by transmission electron microscopy(TEM),X-ray diffraction(XRD),particle size distribution and Brunauer-Emmett-Teller(BET) surface area measurements.The photocatalytic performances of t…
1,3-cyclohexanedione(CHD) has generally been industrially produced from the hydrogenation of resorcinol(RES).In this paper,the analysis and purification of the resorcinol hydrogenation products were studied by GC-MS.A gas chromatography method was established to quantitatively analyze the resorcinol and 1,3-cyclohexan…
The preparation methods of porous TiO2 thin films,such as liquid phase ways(Including sol-gel,eva-poration-induced self-assembly,etc.),physical vapor deposition ways(Including magnetron sputtering,electron beam evaporation deposition,etc.),electrochemical ways(Including anodic oxidation,micro-arc oxidation,etc.) are s…
With changing amplitude,the dissimilar titanium alloys of TC11 and TC17 were welded by linear friction welding and the welded joint temperature was measured.The microstructure of the joints and flash were examined using an optical microscope(OPM) and a scanning electron microscope(SEM).Electron probe microanalysis(EPM…
Activated carbon nanofibers from electrospun cellulose precursor nanofibers were prepared through chemical activation.The fibers were firstly impregnated in ZnCl2 aq.solution.Such treatment can lower the pyrolysis temperature for cellulose fibers,favoring de-hydration over de-polymerization,thus resulting in the produ…
The influence of acids(HAc,HCl) on degrading cellulose of cellulase was studied with haulm.There are two schemes to be designed to decompose cellulose: Scheme one is enzyme-lyses after acids-lyses;Scheme two is acids-lyses after enzyme-lyses.A novel approach to depolymerize cellulose-cycling degrading with cellulase a…