Materials Literature
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The morphology,particle size,crystal structure,impurity and microwave absorbing properties of the aphanitic graphite were studied in order to explore the applications of the aphanitic graphite in microwave absorbing materials.The results indicate that the absorbing properties of the aphanitic graphite/LDPE composites…
An effective method of using cellulosic substances(filter paper) as template was employed to prepare SnO2nanotubular materials examined as anode for Li-ion battery. According to XRD, SEM, TEM and HR-TEM analysis,the synthesized nanotubular materials retained morphological hierarchy of the filter paper, and each nanotu…
La(OH)3nanoparticles with various morphologics(i.e.,irregular,sheet and rod) were synthesized using La(NO3)3.6H2O as raw materials by a microwave hydrothermal method.The phase composition,morphology and optical properties of as-prepared samples were characterized by X-ray diffraction,field emission scanning electron m…
The DeNOx efficiencies of two typical SCR catalysts before and after service were examined with NH3 as a reducing agent under different temperatures and NH3/NO ratios on the experimental platform for SCR catalyst activity detection.The activity variation of catalysts after service was analyzed.The apparent kinetic par…
The long afterglow phosphor of Sr2MgSi2O7:Eu2+,Dy3+ was synthesized by high temperature solid state method.Polypropylene luminescent fiber containing this phosphor was prepared by melt spinning.Micro morphology,phase structure,spectral features and afterglow properties of the luminescent fiber were tested.The results…
Lvhua 9peaches were used to explore the effects of 1%chitosan and 2%chitosan treatments on the quality of peaches stored at(0±1)℃and relative humidity 80%～95%.Physicochemical indexes of various treatments were compared.The results showed that compared with CK,chitosan coating treatment could significantly reduce the d…
Tri-layer composite NiO-8%Y2O3/ZrO2(YSZ) anode supported single cell for solid oxide fuel cell(SOFC) was fabricated via tape-casting,and high performance cathode La0.6Sr0.4Co0.2Fe0.8O3–δ(LSCF) was fabricated at a low temperature via infiltration in porous YSZ.The morphology-controlled and uniformly-distributed nano-el…
The mechanical properties of T700/3234 Laminate were studied in this paper,T700/3234 Laminate ply was [45°/-45°/0°/90°/0°]1S.T700/3234 unidirectional carbon fiber reinforced epoxy prepreg cured at 125℃ is suitable for autocalve processing method.The tensile properties、compress properties flexural properties,interlamin…
The paper provides an overall introduction of the status of practical superconducting joints preparation technology,assesses characteristics of certain current important superconducting joints preparation technologies such as brazing joint,diffusion welding joint,dip welding joint,sintering process joint and cold pres…
A graphene-polypyrrole nanotube hybrid is fabricated by chemical hybridization method.Scanning electron microscopy,transmission electron microscopy,fourier-transmission infrared spectroscopy,X-ray photoelectron spectroscopy and electrochemical workstation are used out to characterize the morphology,structure and prope…
Fish skin of Clarias fuscus was a by-product of freshwater aquatic products processing, which is rich in resources. To improve the utilization of aquatic by-products, the fish skin of Clarias fuscus was used as raw materials for acid-soluble collagen(ASC) extraction at 4 ℃.It's the physicochemical of the extracts was…
The situation of energy-conservation and discharge-reduction for the foundry industry in our country,the development objective in development project in the 12th Five-Year Plan as well as the new method and application for energy-conservation and discharge-reduction for the foundry industry are introduced in the paper…
In order to improve the mechanical and tribological properties of nitrile rubber( NBR),the surface chemical modification w as performed w ith the oxidation solution mainly formulated by the concentrated sulfuric acid. The effect of sulfuric acid concentration and immersion time on both mechanical and tribological prop…
Through the hardness,impact toughness,tensile strength,yield strength and metallographic analyses,we research the effects of heat treatment process on microstructure and mechanical properties of die material H13 steel.The results indicate that H13 steel can make the hardness meet large extrusion die design requirement…
Based on the industrial production of non-oriented electrical steel,rare earth(RE) alloy treatment during the RH refining process was studied.The results showed that the effects of desulfurization and total concentration of RE remained in steel mainly depended on the chemical compositions of different steel grades.For…
Bamboo pulp fiber also called regenerated cellulose fiber is a new type of green health textile material.Due to its special performance,it will become one of the hot spot of domestic textile development with great development potential.To introduce the performance characteristics,the production process and some proble…
1,1′-Dihydroxy-5,5′-bitetrazole(H2DHBT) was synthesized via the reactions of substitution and cyclization using dichloroglyoxime as starting material with the total yield of 73.4%.The thermal stability of H2DHBT was studied by differential scanning calorimetry(DSC).Its exothermal decomposition peak temperature was 231…
The flow field in an automotive catalytic converter with dual substrates was numerically simulated by the computational fluid dynamics method(CFD). Flow uniformity index calculated by reasonable statistical formulas was used to analyze the effects of the gap width between the substrates,cell density,and substrate leng…
The precipitation kinetics function of B2 type intermetallic compound was established based on the microscopic phase-field kinetics theory,and it was used to investigate the formation and the motion of B2-FeAl ordered domain boundaries during aging of Fe-Al alloy.The results demonstrate that the nucleation incubation…
Johnson-Cook(J-C) material constitutive model is inaccurate for machining simulation of titanium alloy with high temperature and heavy impact.In this study,a modified constitutive model of Ti-6Al-4V alloy based on recrystallization was established considering the phenomenon of stress decline during machining.High-temp…