Materials Literature
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Effects of the various alkali metals(Li,Na,K,Cs) on the catalytic performances of the Cu-Fe-Co co-impregnation catalyst for CO hydrogenation were investigated.Researches show that the addition of alkali metal can observely inhibit the methanation effect,improve the activity of catalyst and promote the transfer of alco…
The high angle annular dark-field imaging technique in scanning transmission electron microscopy(HAADF-STEM) was used to investigate the microstructure features of the T-phase particles in a commercial Al-Cu-Mg alloy.The obtained images viewed along the T direction show that there are many microtwins in the T-phase pa…
Duplex stainless steel(DSS) has the economy and reliability,which could be widely used in the construction of nuclear power plant.Compared with traditional stainless steel,DSS has the advantage in corrosion resistance,welding performance and mechanical property.Using DSS can cut down the material cost of nuclear const…
In order to explore the relation between the particle size distribution and the damage degree of energetic crystal during pressing,three kinds of insensitive HMX crystals with different particle size were chosen to analyze their change of microstructure and particle size distribution after being pressed.The results sh…
(1-x)(Na0.52K0.48)NbO3-x(Bi0.5Na0.5)0.94Ba0.06TiO3(KNN-xBNBT) lead-free piezoceramics were prepared by conventional solid-state sintering method.The samples were characterized by X-ray techniques and scanning electron microscopy.Piezoelectric and dielectric data were presented.All samples possess orthorhombic perovski…
Ordered mesoporous carbon frameworks with two-dimensional hexagonal structure have been synthesized through solvent evaporation induced organic-organic self-assembly method(EISA),by using triblock copolymer F127 or P123 as the template and novalac phenolic resin as the carbon precursor.The structures of ordered mesopo…
α-sulfonated fatty acid esters is a new anionic surfactant which is synthesized by natural oil as raw material through ester exchanging,sulfonation and neutralization processes.In this paper,some physical-chemical behaviors of this product,such as cmc,solubility,foamability,detergency and calcium stability are introdu…
The production of light olefins from syngas is one of the hot topics to prepare important organic chemicals from non-oil resources.Technical progress in the process,including research on catalysts,reactors and process,was summarized.It is believed that highly active and selective catalysts are key to break the limit o…
【Objective】 To estimate the effect of different cooling methods on the histological structure and cytoactive of cryopreserved homograft cardiac valves in liquid nitrogen with chondroitin sulfate(CS).【Methods】 32 rabbit aortic valves were randomly divided into control and experiment groups(Ⅰ-Ⅲ)(n =8).All the valves wer…
In this paper,we prepared a novel solid base catalyst SBA-15-pr-TBD by immobilizing 1,5,7-Triazabicyclo dec-5-ene(TBD) on the surface of mesoporous molecular sieve SBA-15 through chemical bonds,characterized the catalyst by XRD,SEM,TG-DTA,IR and the Hammett titration method,and studied the application of the catalyst…
Based on three-dimensional body measurement technology,this paper measures the data about young women's size in the North area of China,and analyzes their cloth type on the basis of this data,so it has an important impact on the production and processing of garment enterprises.
Titanium alloys have good biocompatibility and are widely used in biomedical field,but their bioactivity and wear-resistance are not good.Therefore,Ti/HA composite is becoming a hot topic.Several commonly used methods in preparing Ti/HA composite,as well as their advantages and disadvantages,are elaborated.The recent…
A highly selective sensing system for turn-on fluorescence assay of norfloxacin(NOR) was proposed based on UV-visible absorption of alizarin red S(ARS) coupled with the use of meso-tetra(N-methyl-4-pyridyl)porphine tetratosylate salt(TMPyP) operative on the fluorescence inner-filter effect(IFE),in which the combinatio…
The microstructure of X100 pipe steel during continuous cooling transformation was studied by thermal simulation testing and optical microscopy,and then the tested steel was hot rolled and the effects of different cooling rates following rolling on microstructure and mechanical properties of the tested steel were stud…
Ordered mesoporous carbon framework with two-dimensional hexagonal had been synthesized through solvent evaporation induced organic-organic self-assembly method(EISA),by using triblock copolymer F127 as template and novalac phenolic resin as carbon precursor.The structure of ordered mesoporous carbon was characterized…
Through the substitution of lithium oxide in spodumene for sodium oxide,potassium oxide and boron oxide,the effects of lithium oxide on high temperature viscosity,low temperature viscosity,processing performance of low boron silicate pharmaceutical glass were investigated.The results show that the application of spodu…
Silicane coupling agent KH-570 was applied to the surface modification of nano Al2O3.The modified nano Al2O3 was dispersed in methyl methacrylate.The in-situ polymerization was used to prepare PMMA/Al2O3 composites,in which azodiisobutyronitrile was used as initiator.FT-IR,UV,DSC and TG were applied to characterize th…
The conductive coatings was prepared by using heat resistant organosilicon as matrix and silver-coated copper powder as filler.The effect of silver-coated copper powder contents on the electrical properties,physical and mechanical properties of the coatings,pot life of the coatings,heat resistance and aging resistance…
Describes research and development progress at home and abroad of a new type of thermal memory function materials,it focuses on classification of thermochromic materials and its color-changing mechanism.It makes a detailed discussion on the classification of thermochromic materials and two types of irreversible and re…
ZnMgSe single crystals were grown by chemical vapor transport(CVT) method in one step,using Zn,Mg and Se2 elements as the raw materials and NH4Cl as the transport agent.The as-grown ZnMgSe crystals were characterized by XRD,RO-XRD,EDS,UV-Vis spectrophotometer and photoluminescence(PL) for their structures,compositions…