Materials Literature
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CuO/SiO2-Al2O3/CC with different Si/Al complex ratio of SiO2 to Al2O3 were prepared by a sol-gel method and characterized with XRD,BET and XPS.The catalytic behavior in selective catalytic reduction(SCR) of NOX by urea was also investigated.The results showed that with the increase of SiO2,the phase composites of the…
Poor stabilities of synthesized mesoporous sieves inhibit their applications.In present work nano-sized high crystalline mineral,natural montmorillonite,was introduced into the synthetic system in order to improve the stability of mesoporous sieve.Two additional siliceous sources,Na2SiO3 and nano-sized white silica,we…
Pure bulk Al with grain size in the range of nano scale was prepared through high energy ball milling using pure Al powder as raw material,and samples prepared with different milling parameters including milling time and milling ratio,etc.were compared.The grain size and mechanical properties of pure bulk Al after bal…
By using a self-prepared oxygen-enriched type highly active absorbent,the influence of CO2 and O2 in flue gas on the desulfurization and denitrification efficiency of the highly active absorbent and the influence of the coexistence of SO2 and NOx on the desulfurization efficiency were experimentally studied at an opti…
The synergetic fire retardant effect of Mg(OH) 2 and encapsulated red phosphorus for HDPE materials and also mechanical properties were studied.The results show that the flame retardant effect were the best when 16 weight percent of coated red phosphorus and Mg(OH) 2 in propotion 2 to 1 were added in materials.The fir…
The pulse current was applied to the solidification process of LY12 Al alloy. The effect of discharging voltage of pulse current on the macrostructures and solute content inside the grain was studied. The discharge process was as follow:the capacitance of the capacitor is 80 μF and the discharge voltage varied from 3…
A review is made on the current status of the surface treatment methods for magnesium-lithium alloy,focusing on the research progress of chemical conversion,electioless plating,anodic oxidation and other surface anticorrosion technologies.The development tendency of the surface treatment technology for magnesium-lithi…
Objective:To establish a methylene blue method for determination of montmorillonite's adsorption capacity instead of the strychnine sulfate method.Method:The standard solution was 0.2% methylene blue solution,diluted by phosphate buffer solution(pH 6.8),the detective wave length was 665 nm.Results:The method was sepci…
The catalytic properties of the Ni-Rh/Al2O3 catalysts for the hydrogen-deuterium exchange of methane were tested with the fixed-bed micro-reactor.The results indicated that the conversion of methane increased by increasing reaction temperature when the temperature was less than 692K,the conversion of methane is not ch…
The mechanism of nitrogen deformation for the machinery parts (workpiece) was discussed. All kinds of influencing facts and the ordinary rules of the nitrogen deformation were analyzed. Through the experimental research, the measurement controlling the deformation is put forward.
Cellulose/[BMIM] Cl solution with different cellulose concentrations was prepared by using the ionic liquid 1-butyl-3-methylimidazolium chloridedispersion [BMIM]Cl as the solvent.The steady rheological properties of the solution were investigated by means of ARES-RFS rheometer.The influence of several factors includin…
In the article,we do attenuation whole reflection to cotton and terylene mixed textile materials by use of FTIR,adopt stepwisemultiple linear regression to choose characteristic wavenumber 1000~1400 cm-1,spectrum datas are disposed by center change and differential coefficient methods in advance.Math modle is built,th…
High pH is usually used in the production of modified starch by the wet method.The influences of the reaction pH and temperature on the whiteness of modified starches were investigated.The experiment showed that the reaction pH has dramatic effect on the whiteness of modified tapioca starches with higher pH companied…
The double diffraction grating system's diffraction-interference effect is important,In this article,two random diffraction screens are placed in front of the len first,the light intensity distribution in the len's back focal plane can expressed by the correlation of the amplitude transmittance function of the two dif…
Aiming at the silkworm breeding objective of strong vitality and stable yield,a new silkworm variety named Qiantang×Xinchao for summer-autumn rearing was bred with the method of hybridization followed by directive breeding and strict selection in specific high temperature and humid environment.The results of laborator…
Kink band of metamorphic rock is an important geologic tectonic trace resulted from the crystal slip under the constructional stress fields. To study its formation mechanism and construction parameters is very important for exploration of tectonic movements of the earth crust. Due to the larger deformation in kinking…
ZSM-5/nano-β core-shell composite-zeolites were hydrothermally synthesized by a secondary growth on core ZSM-5 with a uniform size of 1 μm,which was pre-adsorbed with nano-β seeds after pretreated with positive PDDA(poly dimethyldiallylammonium chloride),and then was calcined in air.The obtained products were characte…
The thermal decomposition processes of 2,6-diamino-3,5-dinitropyridine-1-oxide(ANPyO) explosive and its polymer bonded explosives were studied by TG at heating rates of 2.5,5,10,20 K·min-1,respectively.The thermal decomposition kinetic parameters and the mechanism functions of ANPyO explosive and its polymer bonded ex…
A novel composite brazing of Ag-8CuO+2YSZ was used in air to seal anode-supported planar solid oxide fuel cell (SOFC) so as to prevent leakage. The effects of YSZ ((Y2O3)0.08(ZrO2)0.92) addition on the microstructure of Ag-CuO solders joint were investigated,and the open-circuit potential (OCP) of a single cell as a f…
The currently used heart valve prostheses,either mechanical cardiac valve or bioprosthetic valve,have their own defects both in anticoagulation and longevity.With the development of tissue engineering techniques,the tissue engineered heart valves are thought to have many advantages in low immunogenicity,durability,and…