搜索结果: 1-15 共查到“工学 Vanadium”相关记录19条 . 查询时间(0.156 秒)
A highly proton-conductive and vanadium-rejected long-side-chain sulfonated polybenzimidazole membrane for redox flow battery
Sulfonated long side chain Polybenzimidazole Vanadium redox flow battery 1 3-Propanesultone
2023/6/19
A long-side-chain sulfonated polybenzimidazole (PBI-PS) membrane was successfully prepared by the reaction of PBI with 1, 3-propanesultone for improving the efficiencies of vanadium redox flow battery...
A new chemical synthesis for vanadium sulfide as high performance cathode
vanadium sulfide chemical synthesis
2015/1/12
Since 1990s, rechargeable Li-ion batteries have been widely used in consumer electronics such as cell phones, global positioning systems (GPS), personnel digital assistants (PDA), digital cameras, and...
Effects of Bi and Ni on the properties of a vanadium phosphorus oxide catalyst
Vanadium phosphorus oxide catalyst Promoter n-Butane oxidation Maleic anhydride selectivity
2014/3/11
Vanadium phosphorus oxide (VPO) catalysts were synthesized by the dihydrate method which involved the two steps for the preparation of the dihydrate (VOPO4×2H2O) and the precursor hemihydrate (VOHPO4×...
One-Pot Four-Component Dakin-West Synthesis of β-Acetamido Ketones Catalyzed by a Vanadium-Substituted Heteropolyacid （图）
homogeneous catalysis heteropolyacid Keggin Wells-Dawson Dakin-West β-acetamido ketone
2013/10/7
The multicomponent condensation of an aryl aldehyde, acetyl chloride, acetonitrile, and enolizable ketone as one-pot synthesis of β-acetamido ketones in high yields was investigated using commercial, ...
Liquid Phase Oxidation of Acetophenone over Rice Husk Silica Vanadium Catalyst（图）
vanadium rice husk silica oxidation acetophenone sol-gel technique
2013/10/8
Rice husk silica catalyst loaded with 10 wt% vanadium was synthesized from agricultural biomass via a sol-gel synthetic route at pH = 9. The catalyst was characterized by different physico-chemical me...
Synthesis of nanoparticeles in ductile iron with small additions of vanadium and niobium and its mechanical properties
Ductile iron Mechanical properties Nanoparticles Vanadium
2011/3/11
It has been shown that the heat treatment of 1095oC/640 oC type of ferritic ductile iron with small addition of 0.08% vanadium permits to obtain of the rounded VC nanoparticles with an average size of...
Natural Contaminants in Drinking Waters (Arsenic, Boron, Fluorine and Vanadium) in the Southern Pampean Plain, Argentina
Arsenic Fluorine Vanadium Hydrochemistry Risk
2013/3/12
This research aims at making a diagnosis of the presence of arsenic, boron, fluorine and vanadium in the waters from the basin of El Divisorio stream, tributary of Paso de las Piedras reservoir, in th...
The effect of nitrogen and vanadium on hardenability of medium carbon 0.4 %C and 1.8 %Cr steel
Manufacturing Hardenability of steel High strength low alloy steels
2009/12/2
Purpose: To investigate the effect of V and N on hardenability of steel containing 0.4 % C and 1.8 % Cr.
Design/methodology/approach: Four laboratory melts with different N and V contents were used.
...
An Internal Friction Study of a Vanadium Microalloyed Steel by a Dynamic Mechanical Thermal Analyser
Interstitial atomsp Internal friction measurement
2009/10/12
The internal friction of a C-Mn-Al-V-N steel was investigated using a dynamic mechanical thermal analyser (DMTA) under di erent austenitisation time, cooling and tempering conditions. Internal frictio...
Oxidative Regeneration of Resid Hydrodesulfurization Catalyst —Effect of Vanadium Accumulation on Properties and Activities of Regenerated Catalyst—
Oxidative regeneration Resid hydrodesulfurization Hydrodemetallation
2009/7/28
Resid hydrodesulfurization catalyst was regenerated after commercial operation and the effect of vanadium accumulation during resid hydrotreating reaction on the following catalyst regeneration was i...
Abrasive wear resistance of high-vanadium cast iron
Mechanical properties Wear resistance Eutectic alloy High-vanadium cast iron
2011/4/1
The study presents the results of tribological tests made on Fe-C-V and Fe-C-V-Si alloys undergoing volume solidification and containing carbon in a range of 1,43-2,58%, vanadium in a range of 5,34-14...
Effect of silicon on the structure and mechanical properties of high-vanadium cast iron
Mechanical properties Fe-C-V alloy Eutectic alloy Eutectic Cast iron
2011/3/31
The results of microstructural examinations and mechanical tests carried out on Fe-C-V and Fe-C-V-Si alloys solidifying in volumetric mode, containing 1,38-1,83%C, 6,76-14,72%V and 1,05-3,69 Si, have ...
Effect of silicon on the structure and mechanical properties of high-vanadium cast iron
Mechanical properties Fe-C-V alloy Eutectic alloy Eutectic Cast iron
2011/3/31
The results of microstructural examinations and mechanical tests carried out on Fe-C-V and Fe-C-V-Si alloys solidifying in volumetric mode, containing 1,38-1,83%C, 6,76-14,72%V and 1,05-3,69 Si, have ...
Effect of heat treatment parameters on the properties of low-alloy cast steel with microadditions of vanadium
Low-alloy cast steel Microstructures Mechanical properties Heat treatment
2011/3/15
This article examines the effect of prolonged time of holding at the temperature of 6200C on the processes of secondary phase precipitation and mechanical properties of low-alloy cast steel with an ad...
MICROADDITIONS OF BORON AND VANADIUM IN ADI PART 2. OWN INVESTIGATIONS
Innovative foundry materials and technologies Heat treat
2011/3/10
In the second part of the study, describing the role of vanadium and boron microadditions in the process of structure formation in heavy-walled castings made from ADI, the results of own investigation...