Materials Literature
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V_2O_5/TiO_2 selective catalytic reduction (SCR) catalyst for DeNOx application was prepared using nanoparticle TiO_2 as the carrier and V_2O_5 as the active component.Preparation and catalytic properties of the catalyst for NOx removal were studied and phase change and sintering temperature of the catalyst were chara…
Undercooling and rapid solidification during free fall of ternary Cu60Sn20Pb20 monotectic alloy are investigated with 3m vacuum drop tube.The results show that the microstructures contain intermetallic compound phase e(Cu3Sn) and solid solution phase(Pb),and the liquidus temperature of this alloy is 1032K.The cooling…
This article is based on the study about the electrochemical performance of hydrogen storage alloys at home and abroad,and has simply represented four influence factors on electrochemical performance of hydrogen storage alloys,which included elements substitution,heat treatment,the second phase and the surface improve…
Using molten LaMg11Zr as the master alloy,LaMg11Zr+200%Ni+xB(x=0,2%,5%,10%) amorphous alloys have been prepared by mechanical alloying(MA),and the effect of boron addition on their structure and electrochemical properties has been investigated.The alloys are amorphous after 20 h ball-milling,and the formation of amorp…
Oxide semiconductor alloys of x(LiGaO2)1/2-(1-x)ZnO were fabricated by the solid state reaction between β-LiGaO2 and ZnO and rf-magnetron sputtering. For the solid state reaction, the wurtzite-type single phases were obtained in the composition range of x≤0.38. The formation range of the alloys was wider than that of…
The working-hardening behaviour of TRIP-assisted steels during plastic deformation was investigated by tensile test. Meanwhile,the volume fraction of retained austenite and the carbon content were measured by X-ray diffraction patterns. The results indicate that the falling rate of working-hardening exponent (n) has c…
ZSM-5,which has a regular channel system of 10-membered cycle pore and SAR=25-50,is selected as a zeolite catalyst to catalyze ethylbenzene dealkylation.A mixture of ethylbenzene,ortho-xylene and meta-xylene is adopted as reactants to keep consistent with the industrial conditions of xylene isomerization.Chemical liqu…
To improve the function of clothing,a new kind of smart clothing design with embedded system as core of control and pneumatic automated technology was developed to aim at some defects of the functional clothing in practical application.Tests showed that the smart clothing could keep warm,adjust temperature and remove…
The effect of different waterproof agents on performance of inorganic lightweight aggregate thermal insulating mortar was investigated. The results showed that waterproof agent can reduce the bulk water absorption amount and improve the physical and mechanical properties of thermal insulating mortar,but it will reduce…
In order to investigate the influence of vibration parameters on the melting and plasticizing process without interference,a model for the melting process of polymer material under the only impact of a pure vibration force field was developed.Melting mechanism was analyzed,and the mass balance equation,momentum balanc…
Photocrosslinkable chitosan(Az-HPCS) was prepared by introducing Az-group onto the amino group of a water-soluble chitosan derivative,hydroxylpropyl chitosan(HPCS).The chemical structure and substitution degree of Az-HPCS were FTIR,NMR and amino-group titration methods.Chitosan nanogel was then prepared by ionic-cross…
Dicumyl peroxide(DCP) was added to metallocene polyethylene(MPE) to make it crosslink by mixing in the mixing roll machine and mould pressing in the block press.With increasing of DCP amount,time of mould pressing and temperature of mould pressing,the crosslinking degree of MPE increased.As the crosslinking degree of…
One pot new process for the preparation of N-isopropyl-p-fluoroaniline has been investigated by hydrogenation and alkylation reactions,using p-fluoronitrobenzene,acetone and hydrogen gas as starting materials.Modified Pt/C catalyst has been chosen by experimental method and the content of Pt in the modified catalyst r…
Objective To investigate the clinical efficacy and safety of the COX-2 inhibitor celecoxib as analgesia in perioperative pain of TKR.Methods Between January 2004 and September 2007.148 patients were selected in our hospital and were randomly divided into four groups with 37 cases in each group.Group A:administration o…
Based on the data of double-pass hot simulation test,with the dynamic recrystallization in the first pass taking into account or being neglected,the 3-dimensional elastoplastic finite element simulation of 09CuPTiRE steel for the hot rolling process in the second pass was carried out utilizing the explicit power analy…
The microstructures of TiO2-SiO2 nanocomposite powders(TS oxides) prepared by sol-gel method were characterized by HRTEM,XPS,XRD and EDS.The structural characteristics and formation mechanism of the TS oxides were discussed.The structural characteristics of the TS oxides are as follows:with the increase in SiO2 conten…
Selective catalytic reduction(SCR) catalysts in thermal power plants were researched and developed.The development of SCR catalysts,such as catalyst formulation, molding process,drying and calcining process,were introduced Laboratory sample with 40 mm×40 mm and standard 150 mm×150 mm catalyst were prepared.Compared to…
With the widespread use of polycrystalline diamond compact,the requirements of the whole performances and some functions are increasing. Based on the different using conditions and the main performances of the PDC,we puts forward the concept of functional polycrystalline diamond compact. And because the different micr…
Numerical simulation of rolling process of an automobile air conditioner V -belt pulley has been studied by use of DEFORM software. The numerical simulation technological conditions include whole heating and inductive localized heating. The distribution of equivalent strain in rolling process,biggest rolling force and…
Polycrystalline single-phase continous,Mullite fibers were prepared by sol-gel method combined with the hydrolysis of Al(NO3)3 and TEOS using PVB as spinning additive.The quasi-ternary phase diagram of PVB/ethanol/H2O system was investigated.DSC-TGA analysis showed that the PVB were exclusive below 600 ℃,and the chang…