Materials Literature
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Microstructure characteristics and mechanical properties of Nb-Mo and Nb micro-alloying X100 pipeline steels in a different processing were investigated by means of experimental mill,optical microssope(OM) and transmission electron microscopy(TEM) and universal tensile testing machine and impact testing machine.The re…
N-Benzyl kurarinol gambogate was synthesized and the technical process was optimized,through Gambogic acid conjugated with N-Benzyl kurarinol.The target compound was obtained.Its chemical structure was confirmed by MS,IR,and 1H-NMR spectra.The yield of N-Benzyl kurarinol gambogate was 61.8%.
Microporous activated carbon was prepared from luffa cylindrical sponge by ZnCl2 activation.The effects of concentration of zinc chloride solution,activation temperature,activation time and impregnating time on the properties of as-prepared activated carbons were investigated by means of orthogonal test design.Results…
Cubic boron nitride crystals were synthesized by Li3N as catalyst under high pressure and high temperature.By using scanning electron microscopy(SEM),the morphology of bulk cross-section and the morphology of cubic boron nitride single crystal were observed,at the same time,the phases around cubic boron nitride crysta…
Ordered nanoporous materials possess unique properties,such as high surface area,uniform and tunable pore size,and abundant morphologies and have attracted a lot of interests since the first discover of microporous molecular sieves and become a special field.This paper provides a comprehensive review of current resear…
Ceramic coatings were formed by micro-arc oxidation in a phosphate electrolyte solution on aluminium alloy with and without a high temperature oxidation prefab film respectively.The effect of prefab films on the micro-arc oxidation coatings was studied.The results show that the high temperature oxidation prefab film i…
The cellulose fiber is extracted from rice straw using the alkali cooking method,and then the dialdehyde cellulose is obtained by selective oxidation with sodium periodate.The effects of oxidant concentration,oxidation temperature and time on aldehyde group content and mass loss of oxidized rice straw cellulose are in…
A series of TiCN nano-composite films with different powers of graphite target were prepared by magnetron sputtering technique.The microstructure and mechanical properties and friction and wear properties at room and high temperature of the films were investigated by X-ray diffractometer,CSM nano-indentation and high-…
A general review is given over the research advances in SCR of NOx with ammonia or hydrocarbons over transition metal-based zeolite catalysts in last 10 years.In NH3-SCR system,Cu and Fe based zeolite catalysts are particularly addressed,the deactivation reasons of these catalysts is discussed as well.In HC-SCR system…
Hilbert-Huang transformation(HHT) has been a new method for processing non-linear and non-stationary signals since the end of the 20th century.Meanwhile,boundary processing is one of its key technologies.A method for EMD boundary processing based on intrinsic wave matching called intrinsic wave matching prediction met…
Electrocatalytic oxidation of ammonia has been investigated extensively in the field of reducing ammonia pollution in the environment,generating clean energy and ammonia sensors.The mechanism of ammonia oxidation and the recently-developed catalytic electrodes are reviewed,as well as the preparation technologies.The i…
For the power drive unit of giant magnetostrictive actuator based on sinusoidal pulse width modulation,its output voltage contains a large number of high-order harmonic w hich w ill bring vibration,noise and damage to the actuator.The harmonic of PWM inverter output voltage w as analyzed by Fourier series.On this basi…
NaAlH4-Tm2O3 hydrogen storage system with reversible capacity was prepared by the ball milling method.The mixtures of two different porous materials(macroporous Al2O3 and mesoporous SiO2) and NaAlH4-Tm2O3 were prepared using the same method,and the influence of the two porous materials on NaAlH4-Tm2O3 was investigated…
In this review,research advances of preparation,structure and catalytic performance of bifunctional catalysts,such as conventional coupled catalysts,novel double layer catalysts and core-shell structure catalysts,for direct synthesis of dimethyl ether from syngas were reviewed.Based on these,the prospects on bifunctio…
TiC/Fe-Cu composites were produced by in-situ synthesis under an electric field on a Gleeble-3500D thermal simulator,and in situ synthesis or directly adding adding TiC particles in a vacuum furnace,respectively.The comparision of samples produced by three methods was investigated.The results show that compared with t…
The environment-friendly preparation process of tert-butylamine by reacting isobutene with ammonia over HZP-II catalyst was studied.The affecting factors on amination were investigated,such as space velocity,reaction temperature,ratio of ammonia to isobutene.In addition,the life of HZP-II catalyst was assessed.Under o…
High performance mordenite zeolite membranes in fluoride media with organic-free template were prepared on macroporous α-Al2O3 tubes by secondary growth.The seeding method was used hot dip-coating and could form a thin and compact layer.The effects of NaF content and Si/Al ratio on the morphology and pervaporation pro…
In this paper,we focus on the fluorescence enhancement effect of photosensitizer cholorin f-ehter(CPD4) which was adsorbed on the surface with varied silver nanoparticles coverages.Substrates with varied coverages of silver nanoparticles(NPs) were prepared through the self-assembly method.The measurements of fluoresce…
Influence of solid solution treatment on microstructure of Inconel 690 alloy at 1050-1200 ℃ was investigated.The results show that the solid solution temperature exhibits an obvious effect on grain size of the alloy,the grain size increases from 10 μm of the as-received alloy to about 19 μm after solution at 1050 ℃,th…
Aiming at hydraulic AGC system in cold rolling mill,test measurement and control system were developed by the object of 300 type reverse cold rolling mill,which was appropriate for testing experiment for mill rigidity.The system was possessed of human-computer interface and function of data storage,with which the roll…