Five Common Schemes for Tungsten Nanowires Preparation

tungsten nanowires image

Tungsten metal has excellent physical and chemical properties, such as high melting point (3410 ℃), high density (19.35g/cm3), high conductivity/thermal conductivity, excellent high temperature strength and hardness, low work escape, very low thermal expansion coefficient and vapor pressure, and good corrosion resistance, which makes tungsten an important functional material and high temperature structural material.

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Monodispersed Tungsten Disulfide Nanosheets

monodispersed tungsten disulfide nanosheets image

Non-noble metal sulfides are layered materials with graphene-like structure, which have good applications in catalysis, microelectronics, semiconductor and other fields. Tungsten sulfide and molybdenum sulfide catalysts have been used as hydrogenation catalysts in petroleum processing. They are widely used in hydrodesulfurization, hydrodenitrification, hydrodearomatization, hydrodeoxygenation and hydrodemetallization.

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Solvothermal Synthesis of Tungsten Diselenide Nanosheets in One Step

solvothermal synthesis of tungsten diselenide nanosheets image

As the main transition metal selenide, tungsten diselenide (WSe2) is a kind of engineering material and functional material with many special properties. WSe2 crystal has a hexagonal sandwich structure similar to MoS2. Each WSe2 molecule layer is composed of two Se atom layers with a W atom layer. The W atom layer and Se atom layer are covalently bonded, while the adjacent WSe2 layers are separated by Se layer with a long distance and a weak van der waals force.

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Nano-alumina Coated Tungsten Powder Preparation by Freeze-drying

nano-alumina coated tungsten powder preparation by freeze-drying image

In order to ensure the uniformity of the dispersion of the composite particles and to improve the properties of the materials to the greatest extent, it is often required that the doped phase particles be coated on the surface of the matrix particles to form a coating to achieve the best mixing degree.

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Surface Amphiphilic Nano Tungsten Molybdenum Sulfide Hydrogenation Catalyst

surface amphiphilic nanometer tungsten molybdenum sulfide hydrogenation catalyst image

Suspension bed hydrogenation is an advanced technology for preparing liquid fuel oil from heavy unconventional oil. Suspension bed hydrogenation process requires catalyst with high activity, high dispersibility, high stability and good economy. Tungsten sulfide and molybdenum sulfide catalysts have been used as hydrogenation catalysts in petroleum processing. They are widely used in hydrodesulfurization, hydrodenitrification and other reactions. They are very promising catalysts for heavy oil hydrogenation in suspension bed process to produce clean fuel.

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Ytterbium Erbium Doped Lead Tungstate Upconversion Materials

ytterbium erbium doped lead tungstate upconversion materials image

In recent years, more and more studies have been carried out on the properties of Er-doped materials, including infrared-visible up-conversion, optical and electrical properties of Er, as well as the progress and development of laser diodes, which have attracted unprecedented attention to Er-doping and luminescence.

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Scheelite Beneficiation Wastewater Treatment Process

scheelite beneficiation wastewater treatment process image

Under the existing technical system, a large amount of sodium silicate (sodium silicate) is usually added to the flotation process of scheelite to form a very stable colloidal dispersion system of fine particles in the pulp, which is conducive to flotation. However, a large amount of water glass wastewater has also been produced after flotation.

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Tungsten-Titanium-Tantalum-Cobalt Cemented Carbide Coated Preparation With Silicon Dioxide

silicon dioxide coated tungsten-titanium-tantalum-cobalt cemented carbide image

The traditional preparation methods of sintered W-Co cemented carbides are usually composed of WC-TiC compound carbides and WC powder, Co powder through proportioning, ball milling, drying, mixing of forming agents, pressing and sintering. The toughness and flexural strength of the tungsten-cobalt-titanium cemented carbides prepared by this method have been improved, but the density and hardness of the materials are low, and the high temperature resistance is poor, so they can not be used as high-speed cutting tools. Tools can only be used for rough or semi-finish machining.

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Tungsten Trioxide Nanosheets Preparation by Thermal Oxidation

tungsten trioxide nanosheets preparation by thermal oxidation image

Tungsten trioxide is an important semiconductor material, which has important applications in gas sensing, catalysis, photoelectric conversion, field emission and other fields. Tungsten trioxide nanosheets with two-dimensional structure have attracted more and more attention in recent years because of their unique photoelectric properties.

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Tungsten Carbide-based Multi-component Nanocomposite Ceramic Mould

tungsten carbide-based multi-component nanocomposite ceramic mould image

Ceramic cutting tools have high hardness and wear resistance, and show excellent cutting performance in high-speed cutting and dry cutting. They are a kind of tool materials with great development prospects. Ceramic materials have excellent thermal stability and wear resistance. They are ideal materials for manufacturing forming dies. They have great development prospects, but their toughness is very poor, so they have not been widely used in the die industry.

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