Materials Literature
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The configuration of the transmission gear box case produced with HT200 grade gray iron was introduced.Based on the analysis of its casting method difficulties,the general method principle,sand cores,venting system and gating system was designed.The test result of primary casting method showed that the casting had sev…
The complexes of rare earth elements Pr(Ⅲ) and Tb(Ⅲ) with quercetin were synthesized.On the basis of mass spectrometry,elemental analysis,molar conductance,IR spectra and UV spectra,the composition and structure of the complexes,PrC15H8O7Cl10·6H2O,TbC15H8O7Cl2·6H2O,were given.MTT colorimetric assay was used to detect…
This article has taken part in the advanced research project of the double barrels self-propelled mortar as platform.Firstly,the design illustrates the purpose and significance of MRSI,analysis on the key factors of Multiple Round Simultaneous Impact(MRSI).Then,it proposes the overall design plan of MRSI weapon system…
The effect of rare earth elements Ce and Nd on microstructure,microhardness and ignition point of AZ91 Magnesium alloy has been studied.The results showed that the lamellar eutectic phases reduced while massive precipitated phases increased with the increasing additions of Ce and Nd.This phenomenon can be attributed t…
The development course of boronizing technology was looked back.The theory and practice of pack boronizing were introduced,including the boronizing mechanism,the microstructures and properties of boronized case of steel,the pack boronizing of cold work and hot work die steels,stainless steel and heat-resistant steel a…
In the factors that leading to separation of Singapore and Malaysia,economic factors clearly occupy an important position.Prior to the merger,the expected economic gains have been one of important driving forces to promote the merger.However,after the establishment of Malaysia,win-win situation had notseen in the econ…
In order to study impact safety of unheated and heated PBX-2 explosives,the test system of heat and projectile impacting mulitiple was designed.The multiple tests utilized Φ50 mm×50 mm PBX-2 explosive as the test samples,the temperature at different positions was tested by thermocouples.Ignition reaction process was a…
Susceptibility of the steel for further cold processing strongly depends on the whole prior history of deformation in the hot working regime.In the industrial hot working processes,e.g.at the roughing stage of hot rolling,or forging,material undergoes complex deformation modes that leads to gradients of both microstru…
The utilization and study of molasses which is a by-product of the suger industry are described.The direct,fermented and modifed application of molasses has been introduced.The utilization and research progress of modified molasses are prospected.
A series of ferroelectric ceramics with variable compositions of(1-x)PZT-x(0.2PFN-0.2PZN-0.6PNN)(x=0.1,0.2,0.3,0.4 and 0.5) were prepared by the precursor method.The proveskite structure and ferroelectric domains were studied by X-ray diffraction(XRD) and transmission electron microscopy(TEM),respectively.The morphotr…
Cu-β zeolite was hydrothermally synthesized in a SiO2-CuO-(TEA)2O-H2O-NH4F system.The structure and chemical composition of the products were determined by X-ray diffraction,infrared spectroscopy,UV-Vis diffuse reflection spectroscopy,thermogravimetry-differential thermal analysis,scanning electron microscopy,and indu…
As a kind of novel nanomaterial,superparamagnetic iron oxide nanoparticles can be used not only as magnetic resonance imaging(MRI) contrast agents,but also as carriers for drug delivery,its research and application are attracting more and more attentions recently.The studies of superparamagnetic iron oxide nanoparticl…
With dissolvable Starch as raw material,Span60 and Tween60 as dispersant agent,N and N-MBAA as cross linked agent,the article generates starch micro-sphere through the anti-phase suspension aggregation method,analyzes the impact of response time,response temperature,initiating agent dosage,and cross linked agent dosag…
Yakela condensate field put into production in 2005 whose productive series is Cretaceous system.Well production component is complex in this gas field with the characteristics of high content of CO2(2.34%-3.1%) and Cl-(about 7×104mg/L) and low H2S(13.33-43.59mg/m3) and pH.Water cut of the condensate oil is 0.76%-12.3…
The reaction mechanism for epoxidation of allyl chloride(ALC) with H2O2 catalyzed by Ti-MWW was studied in detail. The results showed that the epoxidation of ALC is first order reaction with respect to the catalyst amount and is the reactions between zero and first order with respect to the substrate concentration and…
Pyrrole(Py) and pyrrole derivative with carboxyl groups,1-(2-carboxyethyl) pyrrole(PyCA),were copolymerized with 6-(1H-pyrrol-1-yl) hexane-l-thiol(PHT) self-assembled on Au surface by chemical polymerization to form a layer of the copolymer film,(poly(PHT-co-Py-co-PyCA)).The carboxyl groups of(poly(PHT-co-Py-co-PyCA))…
OBJECTIVE:To prepare Indomethacin sustained-release pellets and to investigate drug release behavior of it in vitro.METHODS:The pellets were prepared by extrusion-spheronization method.The extrusion velocity,spheronization velocity and spheronization time were optimized with the field of pellets as index.The formula o…
The welding property of Cr18-type double phase stainless steel(austenite+ ferrite)is analyzed,and its main welding defects and relevant mechanisms in the actual welding operation are introduced.Technically,with focus on the shielded metal arc welding and TIG welding methods and with steel pipes and plate material weld…
In the paper is studied the relationship of bursting strength against test area of knitted with its test principle and method presented.The tested bursting strength is of great difference when the test area of the sample is different,and no fixed and related coefficient does exist.FZ/T 73018—2002 wool knitted goods st…
Controlling the size and morphology of TiO2 within micron-size,could help to carry out the idea that TiO2 photocatalyst can be easily recycled with remarkable photocatalystic property.Micron-size titanium dioxide(TiO2) flaky crystal was synthesized by means of a simple template-free hydrothermal method using rutile Ti…