Epoxy Catalyzed by Phosphomolybdophosphate Tungstophosphoric Acid

epoxides catalyzed by phosphomolybdophosphate tungstophosphoric acid image

Heteropolyacids have been developed for more than 100 years, and the research contents have been gradually extended to material chemistry, electrochemistry, catalytic chemistry, photochemistry, surface science, medicine and other fields. Therefore, heteropolyacids show high catalytic activity and selectivity for various organic reactions.

Read more...

Indium Ferrocyanide Tungsten Trioxide Film

indium ferrocyanide tungsten trioxide film image

In architecture, through glass doors and windows is the main source of energy loss. In China, the energy loss through glass doors and windows can be as high as 40% - 50% of the total building energy consumption. At the same time, especially in today's society, the large-scale use of glass wall aggravates the loss of building energy consumption.

Read more...

Sheet Silver Nickel Tungsten Electrical Contact

sheet silver nickel tungsten electrical contact image

Silver nickel electrical contact has been widely used in various low-voltage electrical appliances because of its good thermal conductivity, low and stable contact resistance, excellent processing performance and other advantages. However, due to its poor anti fusion welding performance, the application range of silver nickel electrical contact is affected.

Read more...

Tungsten Carbide Shell Coated Lithium Iron Phosphate Cathode Material

tungsten carbide shell coated lithium iron phosphate cathode material image

Cathode materials have been the bottleneck to improve the performance and reduce the cost of lithium-ion batteries. Lithium iron phosphate is the first choice of cathode materials for modern commercial lithium-ion batteries because of its low price, high energy density, long life and good safety. However, the low electronic conductivity of lithium iron phosphate seriously hinders its application in the field of power and energy storage batteries.

Read more...

Heat Resistant Water-based Nano Tungsten Disulfide Isothermal Forging Lubricant

heat resistant water-based nano tungsten disulfide isothermal forging lubricant image

Tungsten disulfide (WS2) is a kind of layered solid lubricant with structure similar to graphite. It has excellent high temperature resistance, extreme pressure resistance, good adsorption capacity on metal surface and low thermal conductivity. WS2 was first applied to the lubrication of the key parts of the American mariner spacecraft, and it was used to prepare high temperature extreme pressure grease and energy-saving engine lubricating oil, with good application results.

Read more...

Nano Tungsten Carbide Powder for Shield Cutting Tools

nanometer tungsten carbide powder for shield cutting tools image

At present, China's major cities are booming in the construction of rail transit projects. Because of its unparalleled advantages, shield method has been widely used in the construction of rail transit tunnels.

Read more...

Rare Earth Doped Tungsten Oxide Nanostructured Films

rare earth doped tungsten oxide nanostructured films image

Rare earth trivalent ions have rich 4f energy level configuration, and their fluorescence characteristics are greatly affected by the crystal field environment and the symmetry of the lattice. At present, many scholars use the small size effect of semiconductor nano materials (ZnO, TiO2) and lattice sensitization to improve the optical properties of rare earth trivalent ions, which are widely used in biological fluorescent probes, optical devices and new luminescent materials.

Read more...

Nano Tungsten and Molybdenum Can Improve the Conductivity of Graphene

ultra thin solar cells image

For electronic and photoelectric applications, solar cells convert energy from sunlight to electricity. Graphene has excellent charge transfer performance. Electrons move in graphene at 1 / 30 of the speed of graphite - much faster than other materials. This shows that graphene can be used in solar cells, but graphene also has a major disadvantage, which hinders this application - its ultra short life excited electrons are only about one picosecond (one millionth of a second).

Read more...

Recovering Sodium Hydroxide Process from Tungsten Smelting

recovering sodium hydroxide process from tungsten smelting image

With the continuous exploitation of tungsten resources, scheelite and medium ores with high impurity content become the main sources of tungsten smelting raw materials. In the existing technology, the smelting of Scheelite Concentrate and medium ore generally adopts the high alkali pressure boiling technology, and the alkali input is generally 2.8-4 times of the theoretical amount. The quality ratio of excess NaOH and WO3 in the coarse sodium tungstate solution obtained after the alkali pressure boiling slurry is 0.7-1.2. If not recovered, it will not only bring adverse effects on the subsequent process, but also consume sulfuric acid to neutralize it before discharging.

Read more...

Tetragonal Nano Tungsten Oxide Preparation by Hydrothermal Method

tetragonal nano tungsten oxide preparation by hydrothermal method image

Nano WO3 has a strong absorption capacity for electromagnetic wave. It can be used as an excellent absorption material in the utilization of solar energy and an important invisible material in the military. It also has a huge specific surface area and remarkable surface effect. It has been widely used in fuel cells, chemical sensors, optoelectronic devices and other fields.

Read more...

 

WeChat