Materials Literature
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Aim Theoretical calculation of the electron Hall mobility and the Hall scattering factor in 4H-and 6H-SiC is performed.Methods The modified low-field transport model utilizing isotropic relaxation time approximation is used.The acoustic phonon deformation potential scattering,polar optical phonon scattering,intervalle…
V(C,N) particulate reinforced iron matrix composite was prepared by powder metallurgy technique,using sintering compacts of mixed ferrovanadium powder,iron powder and graphite powder in nitrogen as raw material.The composite was investigated by thermo-dynamics,differential thermal analysis,densifying and microstructur…
Up-converting phosphors(UCPs)can effectively convert longer wavelength radiation into shorter wavelength fluorescence and exhibit application potential in improving the light energy utilization,especially the sunlight with a longer wavelength.In this paper,the research background of the photocatalysis based on UCPs is…
The influences of the second normalizing temperatures on the microstructure and low temperature impact properties of B+grade steel were studied by microscope,SEM,low temperature impact and tensile tests.The results indicate that,after the second normalizing,compared with the first normalizing,the microstructure is obv…
The curing reaction process of bisphenol A cyanate ester resin(CE) modified by alicyclic epoxy resin(L2) was investigated by differential scanning calorimetry(DSC).The influences of L2 contents on heat resistance and bonding strength of CE were discussed.The results showed that the L2 had catalysis in curing reaction…
Low-density polyethylene(LDPE) and nano-silica(n-SiO2) composite coatings were prepared by flame spraying process.The effect of the dosage of n-SiO2 on the rheological behavior of LDPE powder was investigated using a torque rheometer and melt flow rate apparatus.The microstructure and mechanical properties of the coat…
The reason of green of unsaturated polyester paint were analyzed.The main factors that influence green of unsaturated polyester film were discussed through a series of experiments.The method for improving antigreen properties of unsaturated polyester paint were pointed out.
The structure and properties of reclaimed rubber by using different reclaiming methods of dynamic devulcanization at high temperature and high pressure and supercritical carbon dioxide devulcanization were studied.The results showed that reclaimed rubber using dynamic devulcanization at high temperature and high press…
Hydroabietyl methacrylate was synthesized by the reaction of methacrylic chloride with hydroabietyl alcohol under hydroxyl-to-chloride molar ratio of 1∶1 and its stucture was characterized by FT-IR,GC/MS,13CNMR,and DSC.The results showed that hydroabietyl methacrylate was mainly composed of tetraabietyl methacrylate,d…
Impact sensitivity,friction sensitivity and thermal decomposition tests were applied to study the influence of different ferrocene derivatives on the sensitivities of ultra-fine AP/ferrocene mixtures.Experimental results showed that the ferrocene derivatives in this paper increase the impact and friction sensitivities…
Different types of nanoparticles and plant species need to be examined to clarify nanoparticles uptake by plant and the subsequent effects,which helps to understand deeply the risk of nanomaterials.In this study,some physiological indicators of green bend sprouts such as the content of chlorophyll,peroxidase activity,…
The experiments discussed hot air 65 ℃,hot air 105 ℃,microwave drying,microwave hot air(65 ℃) combination,microwave hot air(105 ℃),infrared and microwave combination,infrared drying methods on the cleaning of the bran.The results showed that a variety of drying methods had some impact on the yield of IDF,but had great…
In the formation of algae bloom,the proportion of nitrogen and phosphorus is the major influential factor.The optimal N/P for alage is 16:1.It is assumed that the particular proportion be related to the growth and division of cyanobacteria cells.The most vital role in vivo of phosphorus is involved in DNA、RNA synthesi…
The auto-winder is the one of the key equipments in textile production.In order to cater the need of the domestic enterprises,the situation of which should be changed from equipment import orientation to equipment export orientation,analysis is done to the specifications,the buildup,the main configuration and the perf…
Core-shell structural luminescence nanomaterials(Y2O3:Eu3+@Gd2O3) were prepared by homogeneous precipitation method.Samples were characterized by X-ray diffraction,Fourier transform infrared spectroscopy,scanning electron microscopy,X-ray photoelectron energy spectroscopy,and photoluminescence spectroscopy.Results sho…
Microstructure change of EA4T axle steel heat-treated with and without electropulsing during austenizing heating and cooling was studied.The results indicate that under the action of pulse current,the band structure of the EA4T steel is suppressed to a certain extent.Pulse current can promote the diffusion of carbon a…
The explosive-driven process of prefabricated fragments warhead detonated in the bottom center was simulation analyzed by using the kinetic finite element analysis software ANSYS/LS-DYNA.The result shows that the explosive-driven process of fragments was simulated very accurately compared with experimental empirical f…
A three-dimensional kinetic Monte Carlo simulation model has been developed.Using this model,we explore the growth process during glancing angle deposition with different incidence angles.Shadowing effect dependence of growth morphology is discussed.Furthermore,we demonstrate the stability of the columnar growth model…
Experiment on boron alloying of gray casting iron surface layer by casting approach was conducted to deal with the problem of gray casting iron container failure by liquid zinc erosion.Results showed that a 2.1 to 2.4mm boron alloyed layer formed on the surface layer of casting iron samples,which consisted of FeB,Fe2B…
OBJECTIVE To investigate the optimal extraction and purification techniques for C21 steroidal glycosides from Cynanchum auriculatum root tuber.METHODS Four factors in extraction process were investigated by orthogonal test.For purification process,AB-8 and HP-20 macroporous resin were compared in order to find the bet…