Materials Literature
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The porous Ni/CB hydrogen evolution membrane electrodes were prepared by film methods.Morphologies and catalytic properties of Ni/CB hydrogen evolution eletrodes were measured and characterized by scanning electron microscopy(SEM)and cathodic polarization curves.The factors of preparation of Ni/CB hydrogen evolution e…
The reason causing the crack defect in ZG15Cr1Mo1V valve body casting was analyzed. According to the analysis results the casting technology was improved from aspects such as the design of gating and feeding system, setting up of local chilling, improvement of core collapsibility, control of pouring temperature and po…
The SEM,surface roughness tester and XRD was used respectively to analyze the influence of unbalanced coefficient of magnetron on the growth of Cr film under the magnetron sputtering environment with direct current and single magnetron pattern.The results show that the surface morphology,surface roughness and crystal…
Mesoporous SiO_2 microspheres were synthesized from n-hexadecylamine and tetraethoxyorthosilicate(TEOS) under specific experimental conditions.The mesoporous SiO_2 was modified with 3-aminopropyl-triethoxysilane by post-synthesis silylation methods.The structure and physicochemical properties of the material were char…
Most catalysts in preparing carbon nanofibers by chemical vapor deposition are transition metals such as Fe,Co and Ni.However,strong acids must be used to purify the products.This process requires high-level equipments and part of impurities can not be removed easily.In this study,carbon nanofibers were obtained by ch…
Porous multiple ceramics film with Ca and P was fabricated by microarc oxidation technology in an electrolyte solution with optimized composition.The surface and section morphology,chemical composition and phase,bioactivity and bonding strength with substrate of the film were studied.The results indicate that porous c…
OBJECTIVE A method was established to study the pharmacokinetics of perospirone in human plasma.METHODS Healthy volunteers received perospirone tablets(low doses、medium doses、high doses、multi doses),and drug concentrations in plasma were determined by HPLC-MS.RESULTS Pharmacokinetic parameters of perospirone after sin…
Sol-gel is an important kind of method to prepare Al2O3-SiO2 powder as a binder in the mullite refractories.In order to get different mullite refractories of good properties,the rates of Al2O3,SiO2 and Al2O3-SiO2 are adjusted to investigate the effect of porosity,the water-absorptivity and the bulk density in mullite…
High temperature high pressure corrosion tests,microstructure observation and electrochemical tests were used to analyze the effects of Cl~-content on the CO_2 corrosion of J55 steel.With Cl~-content increased up to 200 g/L in the solution,CO_2 corrosion rate of J55 steel decreased,corrosion scale became much compact…
One of applications of rosin in PU paint is rosin ester resin modified polyisocyanate prepolymer. The principle,material selection,formulation design,manufacture process,product index and application properties thereof are discussed. Prepolymer therefrom with low free TDI content applied in curing agent of two-compone…
This paper provides an overview of the development in the market situation of soap and toilet soap,and the innovation of them.In consumer′s pursuit of more natural,safer soaps,a variety of personal cleaning products with different quality,flavor,color,shape and packaging flooded the market,consumers have more choices.…
CaO-B2O3-SiO2 glass ceramics is characterized by both low temperature co-firing and excellent dielectric properties.9 compositions of 3 series of glasses around the eutectic region of the CaO-B2O3-SiO2 ternary phase diagram were melted.Differential thermal analysis and X-ray diffraction analysis are performed to study…
This paper studied parts of the physical properties of liquid steel slag,such as melting temperature,viscosity,diffusion coefficient of elements,and the thermodynamic problem of the chemical properties.
For predicting the glass transition temperature (Tg) of hydroxyl-terminated polybutadiene (HTPB) / plasticizer blends,constant pressure and constant temperature ensemble (NPT) molecular dynamics (MD) simulation was employed to obtain specific volume as a function of temperature for pure HTPB,HTPB/dioctyl seba- cate (H…
Five crescent oligoamides were synthesized by alternate condensation of 2-methoxybenzenamine and 2,4-bis-{2-[2-(methoxy-ethoxy)-ethoxy]-ethoxy}-5-nitro-benzoyl chloride or 2,4-dimethoxy-5-nitro-benzoyl chloride.The structures were characterized by 1H NMR,13C NMR,and HR-MS.
Graphitic carbon nitride (g-C_3N_4) was used as raw materials for synthesizing superhard C_3N_4. High-temperature and high-pressure (HTHP) technique has been used to investigate the g-C_3N_4 by a cubic anvil high-pressure apparatus. The results show that samples were still g-C_3N_4 at 600 ℃ and 800 ℃ under 5. 2 GPa by…
To investigate the relationship between the tensile properties of mulberry fiber/cotton fiber blended yarns and the variation of the mulberry fiber content,mulberry fiber/cotton fiber blended yarns with different blending ratio were spun and the tensile properties of these yarns were tested through electronic yarn str…
Nanosized poly(3,4-ethylenedioxythiophene)/manganese oxide (PEDOT/MnO2) composite was prepared by an interfacial polymerization method. The structure and morphology of the product was characterized by IR, XRD, BET surface area, SEM, and TEM techniques. The results showed that the as-prepared amorphous nanocomposite ha…
The BaM ferrite films with fine grain size as small as 30 nm were prepared by reactive RF diode sputtering method,using alternate depositing process.It is found that two step annealing process is beneficial for films to form perpendicular orientation structures,which were identified by microstructure measurement such…
The dialkyltin p-aminophenylacetate complex {[n-Bu2Sn(O2CCH2C6H4NH2-p)]2O}2 was synthesized by the reaction of dialkyltin oxide with p-aminophenylacetic acid.Its structure has been determined by X-ray single crystal diffraction.The crystal belongs to monoclinic space group P21/n,with a=1.336 3(2)nm,b=1.168 5(2)nm,c=2.…