Materials Literature
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The active SiO2 with high specific surface was prepared with fly ash as the raw material.According to the chemical and mineralogical composition of the high-alumina fly ash,the extraction technical route of amorphous SiO2 with NaOH solution was determined.The optimum extraction conditions were determined by orthogonal…
A four-phase 8/6 bipolar switched reluctance motors with segmental rotor(SSRM) which was excitated with bipolar currents by four identical H-bridges insuring no collision of the magnetic flux in the stator teeth was proposed.The operation principle of the bipolar SSRM was explained and the basic characteristics of bip…
0.2 wt% of phenyl silicone(PSi)and 0.1 wt% of potassium diphenylsulfone sulfonate(KSS)were used to modify the flame retardancy of polycarbonate(PC).The obtained flame-retarded PC(PKFSi)specimens were analyzed by limiting oxygen index test(LOI),vertical burning,TGA analysis and pyrolysis-gas chromatography/mass spectro…
Glass-ceramics were prepared by the melting method with SiO2, Na2O, CaO, P2O5 and Fe2O3 as the raw material. As the magnetite crystal grew spontaneously during the natural cooling process of glass, there was no thermal processing, such as nucleating and crystallization etc., conducted for the glass during this fabrica…
The portable shelter which mainly contained the foam of Polystyrene(PS) should be recycled after earthquake.In order to make the recycled polystyrene(rPS) useful,rPS was toughened with ethylene-octylene copolymer thermoplastic elastomer(POE) and high-density polyethylene(HDPE),and compatibilized with styrene-butadiene…
BaMoO_4:Eu~(3+)phosphors were synthesized by high temperature ball milling method and using(NH_4)_6Mo_7O_(24)·4H_2O,BaCO_3 and Eu_2O_3 as raw materials.Crystalline phases,morphology and luminescent properties of sample were characterized by XRD,SEM and emission spectra. XRD patterns indicated that a single phase of Ba…
Transparent glass-ceramics were prepared by melting-casting-crystallization process,using Xiuyan jade waste as raw material and supplemented by industrial chemicals.The crystallization temperature was obtained from DSC curve,the main crystalline phase was determined by XRD diffraction analysis,and observed the crystal…
Theory and practice show that the observation of the transient magnetic field in the TEM has more advantages than that of the induced EMF.With the application and improvement of the high-temperature superconducting technology,the direct observation of transient magnetic field signal has become a reality in the TEM.How…
Acrylonitrile-butadiene-styrene (ABS)/polymethyl methacrylate (PMMA) blends were prepared in a corotating twin-screw extruder.Effect of number of extrusion and compatibilizing agent on mechanical properties of ABS/PMMA blends was studied.The glass transition temperature was measured by differential scanning calorimetr…
Brazing is the major method of connecting cemented carbider and steel matrix,and high-frequency induction brazing was mainly used for volume-produce.The major factors influencing the quality of welded point include the inadequate wetting and padding of soldering,the excessive welding residual stress and the generation…
Polypropylene/montmorillonite (PP/MMT) nanocomposites were prepared by melt intercalation method. The rheological behaviors and mechanical properties of the PP/MMT nanocomposites were studied. The analysis of transmission electron microscopy (TEM) and X-ray diffraction (XRD) indicated that the poly(ethylene glycol) (P…
A flame retardant in the form of microencapsulate(MRP) was prepared by encapsulating red phosphorus with phenol-formaldehyde resin via in-situ polymerization.The MRP was characterized using infrared spectroscopy,scanning electron microscope,X-ray photoelectron spectroscopy,laser particle size analyzer,and thermogravim…
Oxy-fuel(alcohol,DME,etc.)is the main chemical product of the coal-based polygeneration system.In this system,25%(vol)methane in the coke-oven gas is reformed with 23%(vol)CO2 in the gasified gas,and the syngas at a proper H/C ratio is further changed to oxy-fuel.It is a system with energy-saving and friendly environm…
OBJECTIVE To study the pharmacokinetics of PLGA-gemcitabine sustained-release microspheres in nude mice with pancreatic cancer,to provide evidence of theories and experiments for its clinical application.METHODS Plasma,tumors,livers and kidneys were obtained after nude mice with pancreatic cancer received interstitial…
The precipitattion behavior of α-phase and tensile properties of Ti-26 alloy after solution treatment and aging at different temperatures were investigated.The results indicate that the volume fraction of α-phase and tensile strength shows a same variation tendency,which first increases to the maximum value and then d…
Effects of different shot peening treatments on the cyclic loading fatigue of 7075 aluminum alloy were studied by X-ray diffraction measurements.Impacts of initial residual stress state,surface micro-hardness and surface roughness on residual stress relaxation were analyzed.The improvement of aluminum alloy specimens'…
The micromixing characteristics in a continuous rotor-stator mixer(CRS) have been studied experimentally by using the iodide-iodate parallel competing reactions system.The influence of flow rate,rotor speed,concentration and volume ratio on the segregation index(XS) has been investigated.The experimental results show…
The preparation of Fe3O4 nanoparticle with chemical co-precipitation method,and surface modification by sodium oleate were introduced.Nano-Fe3O4 particles were prepared under different conditions,the properties of the particle were measured by XRD,VSM,SEM and FTIR.The optimum preparation conditions of nano-Fe3O4 and t…
The micro-crystal muscovite is a new kind of mineral found in west Sichuan area.The surface of the micro-crystal muscovite powders were modified by silane coupling agent KH-550 and added into plasticized poly(vinyl chloride)(PVC).While the modified micro-crystal muscovite powders were studied by viscosity,and the stru…
Thermal stability and thermal degradation kinetics of polypropylene (PP) and IFR/SiO2/PP were investigated by a conventional dynamic thermogravimetric analysis(TGA) under highly purity N2 atmosphere at different heating rates between 15 ℃/min and 35 ℃/min,and the thermal degradation activation energy of PP and IFR/SiO…