Materials Literature
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In order to obtain borides with a dual boride layer comprised of titanium diboride(TiB2) and titanium boride(TiB),molten salts boronizing on Ti metallic surface using Na2B4O7 and Na2B4O7+Al as boronizing agent was carried out.Phase conposition of coating layer was characterized by X-ray diffraction(XRD).The results sh…
NiCuZn ferrite powders were prepared by self-propagating high temperature synthesis(SHS) using carbon powder with different mass fractions as fuel.The prepared NiCuZn powder was firstly pressed into a ring and then sintered.The effect of carbon content in the raw materials on the phase composition,microstructure,densi…
In order to explore the cause for the existence of variegated substance in seawater cultured pearls,the authors observed the microstructure of variegated substance with scanning electron microscopy(SEM),and then used thermogravimetric analyzer and Fourier infrared spectrometer(FIR) to analyze the composition of varieg…
Addition of water steam into regeneration process was applied to enhance the performance of Cu-Bi catalyst in the reaction of acetylene hydrochlorination,and the stability of the catalyst was tested by multiple reaction-regeneration cycles.The results showed that compared with traditional regeneration method by air on…
The effects of marine anaerobic bacteria on the corrosion behavior of copper were investigated by mesuring the open-circuit potentials,polarization curves and electrochemical impedance spectroscopy(EIS).The results show that by morphology analysis using scanning electron microscopy(SEM),the marine microbes SRB adherin…
This paper uses cation modifying agent DL to modify silk fiber and discusses the influence of modifying agent DL and its modifying process condition on the dyeing property of reactive dyes for silk fiber.The research result shows that the best modifying process condition of modifying agent DL is: Mass concentration of…
The Mn-Zn ferrite was prepared by refluxing method using high permeability ferrite waste and NH4HCO3.The pH of co-precipitation and phase transformation,reaction time were determined through theoretical analysis and experiment verification.The techniques such as ICP-AES,XRD,and SEM were used to describe their crystal…
Beijing KEHUA advanced material technology Co.,Ltd.got a subsidized item of 02 Project from the Ministry of Science and Technology in the 11th 5-year plan and succeeded in the research of green epoxy molding compound(EMC) KHG700 for LQFP package,which is comparable with some kinds of import EMC products.KHG700 applies…
Cellulose,as an important,low cost and wide available natural products,might be the most valuable biomass resources as the substitute for petroleum.The study on chemistry of cellulose materials has been developed rapidly and has become a hot topic in recent years.In this area,the investigation of graft copolymer of ce…
PET/PVA composite nanofiber was fabricated by electrospinning,and crosslinked with glutaraldehyde vapor.The morphology of the nanofiber was characterized by SEM,and the properties of the product were measured by thermal analysis(DSC),water contact angle and tensile test.The results showed that the PET/PVA composite na…
The generation and development as well as the principle of determining fogging characteristics of interior automotive materials are introduced.Polyester and flax fabrics are chosen to compare different fogging test standards.It is found that testing temperature,cooling temperature,testing time of different standards w…
In the development process of wood particles with polystyrene particles composite heat-insulated board,FRW fire retardant used to improve the flame retardancy of the composite heat-insulated board.In exerts in 10%～20% scope,the burning inhibitor to the compound heat preservation board thermal conductivity,the compress…
Thermotropic main-chain liquid crystalline ionomers were synthesized from isosorbide,sebacoyl chloride and brilliant yellow by interfacial condensation reaction.The structure of polymers was characterized by infrared spectroscopy(FT-IR),the liquid crystal properties were characterized by POM,DSC and X-ray.The results…
A kind of 550 MPa steel used for engineering machinery with low cost was prepared,and the effects of ultra fast cooling process after rolling on microstructure and mechanical property of the steel were studied.The results show that the ultra fast cooling process could increase the properties of the steel effectively,a…
According to the manufacture experience of the Europe third generation reactor type evolutionary power reactor (EPR) steam generator, research on preventing the deformation during the steam generator manufacture through improving the machining process and welding process; prevent the deformation by choosing and using…
The structure,principle and the application of multi-disc filter made domestic were introduced.This filter suitable for not only paper machine whitewater,but also the stock concentration whitewater of chemi-mechanical pulp and pulp from waste paper,has the characteristics of reliability in running,convenient in operat…
Planar solid oxide fuel cell(SOFC) is a technology which converts chemical energy into electrical energy directly.Its advantages are high efficiency in energy utilization,compact structure and low pollution to environment,etc,which makes it to be the best replacement of fossil energy.In SOFC stack,sealing technology m…
The effects of aging treatment on the properties of differently cold rolledCu-1.0Cr-0.1Zr alloywere analyzed using tensile tests,conductivity measurement,OM and TEM.The results show: Cu-1.0Cr-0.1Zr alloy has the best comprehensive performance after solution treatment at 950℃ for 1 h and 70% cold rolling ratio and then…
The smelting and processing of aluminum and copper will generate a lot of equipment energy consumption,resulting in the loss of energy.This article explains how to improve the energy-saving in aluminum,copper smelting and processing equipment from three aspects of equipment selection,production process and equipment t…
Tungstovanadophosphoric heteropoly acid with tri-vanadium-substituted Dawson structure supported by activated carbon was prepared by impregnation method and characterized by IR.Its catalytic performance was studied in the catalytic synthesis of tetrahydrofuran from 1,4-butanediol.The optimal reaction condition was obt…