Materials Literature
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The corrosion and abrasion behaviors of T2/QCr0.5 rubbing pairs in rainy environment were studied using a friction and wear tester of HST-100 under current-carrying condition.The morphology and macroscopic temperature of worn surfaces were observed and measured by scanning electron microscopy(SEM)and thermocouple resp…
Diethylene glycol vinyl ether was synthesized with DEG and acetylene gas as raw materials and potassium metal as the catalyst.The influences of fractional conversion in different experiments conditions were studied.The results indicated that the conversion rate of reaction was above 60% when the reaction time was abov…
The influence of alloy composition and continuous casting process on 10B21 cold heading steel was studied and optimized to get a good billet surface quality and mechanical properties to meet the requirements of cold heading wire rod.Results show that,billet surface quality and high-temperature brittle materials are cl…
Irradiation property is the main factor to influence the use life-time and operation safety of reactor pressure vessel(RPV).The main influencing factors of RPV steel irradiation brittleness are discussed in this paper,and the control measures are provided in chemical composition,manufacturing process and annealing aft…
Self-assembly of supramolecular AB diblock copolymer/C homopolymer mixtures in selective solvents was examined by real-space self-consistent field theory.The non-covalent bond is formed between the free end of hydrophobic B block of amphiphilic AB diblock copolymer and one end of hydrophobic C homopolymer,and thereby…
1%Tm3+-doped,5%Ho3+-doped and 1%Tm3+,5%Ho3+ co-doped Y2O3 nanocrystals were synthesized by solution combustion method.The particle size,structure and morphology of the samples were characterized by X-ray diffraction and transmission electron micrograph.Under 785 nm laser excitation,multicolor upconversion emissions ne…
SBA-1 and Zr-SBA-1 mesoporous molecular sieves with cubic phase were synthesized in-situ under strong acid condition with tetraethyl orthosilicate as Si source,isopropyl zirconium oxide as Zr source and cetyltriethyl ammonium bromide as template.SBA-1 and Zr-SBA-1 supported Pt-H_3PW_(12)O_(40)(2%Pt-30%HPA/SBA-1 and 2%…
Lithium sodium potassium niobate 0.94(K0.5Na0.5)NbO3-0.06LiNbO3(KNLN6) lead-free piezoelectric ceramic powders were prepared by solid state reaction technique.X-ray diffractometer(XRD),scanning electron microscope/energy-dispersive spectrometer(SEM/EDS) and high resolution transmission electron microscope(HRTEM) were…
A series of mesoporous sulfated silica-zirconia materials with various Si/Zr molar ratios(2.0~5.0) have been prepared using tri-block copolymer as a template,which was characterized by X-ray diffraction,TEM,nitrogen adsorption-desorption,UV-Vis diffuse reflectance spectroscopy,infrared spectroscopy,thermal gravimetric…
In order to improve the hydrophilicity of raw cotton fabrics,the influence of plasma treatment parameters on the surface properties of raw cotton fabrics was studied,focusing on effects of plasma treatment time,treatment power and treatment distance on the wickability of the raw cotton fabrics.The XPS analysis showed…
A new eco-friendly zinc stripping method capable of replacing the traditional zinc stripping in electroplating of aluminum alloy,which is composed of 50%nitric acid and has the problems of high concentration, high volatility and harmful to human body is introduced.This new zinc stripping method consists of 10 mL/L con…
By means of macro observation,chemical compositions analysis,hardness testing,metallographic examination,fracture analysis and energy spectrum analysis,early surface cleft spalling failure reason of a batch of GCr15 steel spinning roller was analyzed.The results show that carbide in material of the roller gathered and…
A new type of carpet backing mainly made from low dense polyethylene,atacticpolypropylene,calcium carbonate and ethylene propylene diene monomer has been investigated,which adopted the method of mixing and sulfur.Its good characteristics include environmental protection,high performance and low cost.The paper also ana…
We successfully prepared a novel inorganic-organic hybrid electrostatically self-assembled multilayer film by alternately depositing Prussian blue (PB) and a thiophene-containing hemicyanine.The optical,electrochemical,and photoelectrochemical properties of the as-prepared films were studied by UV-visible absorption s…
Objective:To evaluate the kinetic models of Absidia coerulea producing low molecular chitosan(LMC) in Batch fermentation.Method:Absidia coerulea was cultured in 10L fermentor,and then the data of cell growth,product formation and substrate consumption were analyzed.Based on the Logistic and Luedeking-Piret equations,t…
Corrosion products on iron ware from Huaguang Reef Ⅰ and the removal of harmful salts were investigated.The surface resistivity of the rust on one iron ware named HTQ6# was(3×103)—(1×108) Ω,and the rust was completely mineralized.The rust including Fe3O4,α-FeOOH,γ-FeOOH and FeOCl was magnetic.In order to avoid the dam…
The influence of the spray drying temperature on the performance of the CuO/ZnO/Al2O3 catalyst used for methanol synthesis is studied in a slurry reactor.The results show that the spray drying temperature lower or higher than 225℃ will lead the precursor to water residual or crystallinity degree higher than optimum re…
The copper complex of aspirin is synthetized by an improved comprehensive chemistry expermen.The structure of copper complex of aspirin is characterized by infrared spectra.The thermal stability of copper aspirin is determined by thermogravimetry.
Mesoporous electrode materials were prepared directly from magnesium citrate.N2 adsorption shows that the specific surface area of the porous carbons prepared amounts to approximate 2 000 m2·g-1,and that mesopore size and volume increase with the rise of carbonization temperature.Typical meso-structured porous carbon…
The alkylation of toluene with tert-butyl alcohol was carried out with lanthanum oxide supported on ultrastable Y zeolite(La2O3/USY) as catalyst in a 100 mL stainless steel batch reactor equipped with a stirrer.The physicochemical properties of La2O3/USY with different La2O3 loadings were characterized by X-ray diffra…