Porous Tungsten

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Edgetech Industries LLC provides porous tungsten rod, sheet and disc with porosity from 20% to 50%.

Porous tungsten is produced by low-temperature sintering, opposite to normal tungsten products sintered at high temperatures (>2000℃). It can be used as a high current density cathode, an important usage for tungsten products. Its porous skeleton is a vital part of the dispenser cathode. This can be used in aerospace, power electronics, and metallurgical industries. It is used to filter high-temperature liquid & gas. 

Properties of our porous tungsten

·High melting point
·Low density
·High strength
·Low thermal expansion coefficient
·Extraordinary corrosion resistance

Specification of our porous tungsten products:

Our regular specification for porous W rod is 6.35mm diameter x 500mm L with around 23% porosity. We can cut to the length per request but it should be >20mm. We also provide porous tungsten cylinders and other customized shapes.

Porous tungsten as a high current density cathode is one of the important applications of this metal, mainly used in high temperature conditions due to its excellent resistance to melting (Tm = 3410 ± 20 °C). Its porous form has been an important component of the distributor cathode used in electron tubes and high-power lamps. The porous tungsten skeleton forms the matrix, which is then impregnated with the electron emitting compound. Every time there is emission from the surface, new material must be fed into the surface pores through the open pore channels. Therefore, it can be proposed that uniform porosity is required to obtain better performance.

Pictures for porous W products

•  Round Block
• Porous Tungsten Rod
•  Round Rod & Disc
• Porous Tungsten Cylinder

Due to the special production process of porous tungsten products, it is not a highly customized product. We only offer rods and discs with very limited parameters. Custom products with large quantities will be considered. Send your request to sales@edge-techind.com