Porous Tungsten

Non-Ferrous Crucible Inc. 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 which are sintered at high temperatures (>2000℃). It can be used as a high current density cathode, which is 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 also used to filter high-temperature liquid & gas.

Properties of our porous W

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

Specification of our porous W products:

The regular specification we have for porous tungsten rod is 6.35mm diameter x 500mm L with around 23% porosity. We can cut to length per request but should be >20mm. We also provide porous titanium products.

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.

Non-Ferrous Crucible Inc. began offering Tungsten and other refractory metals products years ago. We specialize in providing worldwide customers with all types of Tungsten fabricated products (such as crucible, rod, and bar, sheet and plates, etc.), heavy alloys that are mostly used as weights and shielding, composites (such as CuW, AgW) that are used for electrode contacts, and carbide alloy using as tools. Contact us at inquiry.crucible@winnewtech.com for inquiries and more information about tungsten.