The cathode is tungsten
The main advantage of the tungsten cathode is a high stability of emission when working, so it is used in vacuum tubes, which require a high constancy of the anode current. The disadvantages should include a large work function and, consequently, high operating temperature, and low efficiency.
The working temperature of the tungsten cathode in the range of 2400 — 2 700°C. In this temperature range, the emission current density from 0 1 to 1 6 a/cm2, and the efficiency is from 2 to 16 mA/W. The low efficiency of the tungsten cathode makes its use limited. Typically, the tungsten cathodes are used only in devices with high demands on the constancy of the emission current. Most powerful generator tubes the tungsten cathodes were replaced by more efficient thoriated cathodes.
Supplier Evek GmbH offers to buy tungsten cathode, the price is optimal in this segment of the rental. Full compliance with the international quality standards. We offer you to buy a tungsten cathode with specialized warehouses supplier Evek GmbH with delivery to any city.
To buy, best price
We offer the tungsten cathode, the price is determined by the technological features of production without the inclusion of additional costs. You can order products in non-standard settings. We have the best ratio of price and quality for the entire range of products. In the segment of tungsten and refractory metals company Evek GmbH — best supplier. Timely delivery is provided by offices in the cities of Eastern Europe.