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  1. Home
  2. Tungsten Information

Tungsten Nitride Preparation

Category: Tungsten Information
Published on 26 January 2018
tungsten nitride image

Tungsten nitride is a kind of material more popular in tungsten chemicals, some studies show that tungsten nitride is a new catalytic material, the surface properties and catalytic properties similar to platinum, tungsten nitride catalyst application can avoid the pollution caused by industrial catalyst sulfur vulcanization, therefore it has broad application prospects. Moreover, tungsten nitride is also a ceramic material with excellent mechanical and thermal stability. For these two applications, nanoscale tungsten nitride will have a significant advantage.

Tungsten Copper Gradient Heat Sink Material

Category: Tungsten Information
Published on 26 January 2018
tungsten copper gradient heat sink material image

Tungsten has high melting point, high hardness and other excellent performance, copper has good electrical conductivity. W-Cu composites composed of tungsten and copper have good thermal conductivity, electrical conductivity and low thermal expansion coefficient. At present, W-Cu composites are used in large scale integrated circuits and high-power microwave devices as electronic packaging materials and heat sink materials such as substrates, connectors and heat dissipation parts. 

Tungsten Copper Gradient Heat Sink Material Preparation by Infiltration Method

Category: Tungsten Information
Published on 26 January 2018
tungsten copper gradient heat sink material image

Tungsten copper composite is one of the most widely used heat sink materials at present. It is made up of high conductivity copper and refractory metal tungsten. They neither dissolve each other nor form intermetallic compounds, so they are also called pseudo alloys.

Viscous Flow of Tungsten Carbide

Category: Tungsten Information
Published on 22 January 2018
frelen kerr ball - spherical model image
The sintering process of tungsten carbide is actually a process of material migration. During the sintering process, the amount and quality of particles on the bonding surface and the spheroidization and shrinkage of the pores in the sintering body are all based on material migration.

Sintering Driving Force - Vacancy Concentration

Category: Tungsten Information
Published on 22 January 2018
vacancy concentration image
Surface tension causes the macroscopic flow of the material to the pores at the neck of the sinter. Additionally, when the crystal powder is sintered, there is also a migration of atoms caused by the concentration gradient of the vacancy concentration. The ideal sphere model can be used to calculate the gap concentration difference caused by the diffusion in the sintering system.

Sintering Driving Force - Saturation Vapor Pressure Difference

Category: Tungsten Information
Published on 22 January 2018
two-ball model image
For tungsten carbide, the surface tension causes the macroscopic flow of the material to the pores at the neck of the sinter. And the material migration of atomic diffusion caused by the difference of the degree gradient caused by the concentration gradient of the vacancy. There may also be a matter of evaporation from the surface of a particle to space. It also has a direct effect on the densification of the sintering and the change of the pore.

Characteristics of Superfine Crystal Tungsten Carbide

Category: Tungsten Information
Published on 22 January 2018
superfine crystal tungsten carbide image
Superfine crystal tungsten carbide is a kind of hard alloy with the grain size of WC < 0.5μm (< 0.2μm for nanometer tungsten carbide). It has become an ideal material for high efficiency and precision cutting tools and PCB bits because of its excellent properties, such as high strength and high hardness.

Direct Reduction Carburization Processing

Category: Tungsten Information
Published on 18 January 2018
direct reduction carburization processing image
With many excellent properties, superfine crystal tungsten carbide has a wide application prospect in the fields of PCB bit and cutting tool. At present, the preparation methods of superfine crystalline tungsten carbide include direct reduction carburization, mechanical alloying and so on.

Preparation of Ultrafine Crystal Tungsten Carbide: Spray-Drying Process

Category: Tungsten Information
Published on 18 January 2018
equipment of spray-drying process image
Superfine crystal tungsten carbide has excellent performances, which is widely used in industrial field. Ultrafine crystal tungsten carbide can be prepared by spray-drying process, of which the main material is mainly superfine WC-Co composite powder. Spray-drying process is a widely applied technology to prepare ultrafine WC-Co composite powder at present. It is also the main way to produce ultrafine WC-Co powder at present.

Preparation of Ultrafine Tungsten Powder

Category: Tungsten Information
Published on 18 January 2018
ultrafine tungsten powder SEM image
Superfine crystal tungsten carbide has many characteristics, such as high hardness, high bending strength, and so on, which is widely used in industrial field. Ultrafine tungsten carbide powder is needed as raw material for the preparation of superfine crystal tungsten carbide. And the ultrafine tungsten carbide powder is carbonized by ultrafine tungsten powder.

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