Materials Literature
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The solubility of fullerene C 60 -fullerene C 70 mixtures in styrene was studied under isothermal conditions at 25°C. The corresponding solubility isotherm is given and characterized.
Pyrolusite doped high-strength alumina matrix fracturing proppant was prepared by the technique of pressureless sintering.The effects of MnO2 and Fe2O3 introduced from pyrolusite on the phase composition,pore structure,grain size and crush resistance of proppants were studied by X-ray diffraction,mercury intrusion por…
The Treaty of Lisbon requests the European Union and the Member States to pay full regard to animal welfare issues when implementing new policies. The present article discusses how these provisions are met in the emerging area of nanotechnology. Political action plans in Europe take into account animal welfare issues…
The thermodynamics of the reactions of alumina(Al2O3) with CaCO3,CaO,SiO2 and FeO in the sintering process of high-iron gibbsite-type bauxite was investigated.The results show that alumina reacts with calcium carbonate much easier than ferri oxide(Fe2O3) at the industrial sintering temperature of 1 473-1 673 K.Alumina…
To investigate the effects of the major components of sintering ore on NO reduction in sintering process,the reduction of NO by CO with or without oxygen was performed.The dynamics of the reduction of NO by CO under the action of sinter ore was calculated.The NO reduction was studied in a fixed bed quartz reactor usin…
In order to improve the hydrogen storage properties of Ti(Cr-Mn)2 alloys,over stoichiometry of A side and partial substitution of Mn by transition metals were adopted,and the hydrogen storage properties of Tix(Cr-Mn-M)2(x=1.0,1.1;M=V,Fe,Ni,Cu) alloys were investigated.The experimental results showed that the alloys af…
We present an improved relaxation algorithm involving rotation of non-spherical particles.In a sphere assembly model,the algorithm simulates random packing of non-spherical particle of any shape as well as particle mixture consisted of particles with different shapes.In the sphere assembly model,particle shape is desc…
Prevalent area of exploitation of CAM (Computer Aided Manufacturing) systems is computer aided program creating for NC production equipment. However, CAM systems do not sufficiently cover all periods of production process and due to this, the necessity to define the systems of Computer Aided Production Engineering - C…
The state-of-the-arts of the research on manufacturing,bending forming,end processing and joint technologies of titanium alloy tube are reviewed.The current development,existing problems and solutions of some key projects are analyzed.Finally,suggestion on research,development and application of titanium alloy tube in…
Two kinds of commercial ammonium polyphosphate (APP) and three kinds of APP which were prepared in the laboratory were studied by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). In identification of the form Ⅱ crys…
Two processes of soaking and liming were tested,an enzyme - assisted test,using chemicals and enzymes,and a conventional test using only chemicals.From the analysis of chloride removal and fat removal from the hide and of SEM images,it was possible to realize that the enzyme - assisted is better when the variable in q…
Epoxy encapsulating materials grafted and modified with polyurethane(PU)was prepared by reaction of —NCO—terminated PU prepolymer with epoxy resin(EP).The FTIR indicated that the reaction between —NCO—terminated PU prepolymer and the secondary hydroxy in epoxy resin has completed.Effect of PU content on viscosity of r…
Friedman's formula for calculating the characteristic drop height of impact sensitivity(H50) of energetic materials(EMs) was derived.A numerical method of estimating the value of H50 was presented.The corresponding computer program was written.The experimental 50% drop height of eight EMs:HMX,RDX,TNT,PETN,BTF,BTF,Tetr…
This paper proposes an electromagnetic transient transformer model on account of ferromagnetic hysteresis of its core,which is used to simulate magnetizing inrush currents during no-load transformers switching on.The hysteresis loop of the transformer ferromagnetic core material is built based on the Jiles-Atherton ph…
This paper presents a critical overview of research progress in the synthesis, properties, structure, and applications of smectite clay-based catalytic materials. The 2:1-type layered structure of smectites, which consists of two Si-O tetrahedral sheets sandwiched by a metal-oxygen octahedral sheet, along with changea…
The effects of RE-Ti on the as-cast microstructure,heat treatment microstructure and mechanical properties of high vanadium high speed steel have been investigated.Results show that when suitable modifier is added to high vanadium high speed steel,the austenite and eutectic carbides are changed.The austenite grains an…
Effects of sulfate-reducing bacteria(SRB) activities on the acceleration of corrosion of carbon steel were studied by EIS and the role of sulfur-containing metabolites by SRB in enhancing the anodic active dissolution of carbon steel was investigated by steady-state polarization technique. The results show that sulfur…
Some zeolites such as ZSM-5 and β that applied widely in industrial processes normally require the presence of organotemplates in their synthesis, which usually results in the pollution of environments and the emission of carbon dioxide and nitrogen oxides. Organotemplate-free routes for synthesizing zeolites are good…
In order to explore the feasibility of the large lightweight SiC primary mirror,the different lightweight forms were compared and a supporting way for the primary mirror was determined.After theoretically calculating the light weighted structure parameters,a sandwich structure SiC primary mirror with sector holes was…
The preparation technology of nano-SiO_2 is introduced,including gas-phase method,arc discharge, precipitation method,sol-gel method and micro-emulsion method.The modification methods and modification mechanism of nano-SiO_2 are reviewed from physical modification and chemical modification two aspects.The applications…