Copper immersion method and device for tungsten sponge matrix

Abstract

The invention provides a copper immersion method and device for a tungsten sponge matrix. The method comprises the steps that a copper immersion device is evacuated to a first vacuum degree, and air is discharged; inert gas is filled, and the vacuum degree is kept at a second vacuum degree; and oxygen-free copper is heated and melted, and the tungsten sponge matrix is immersed in liquid copper for the time T and then taken out, wherein the inert gas does not chemically react with the oxygen-free copper and the tungsten, the second vacuum degree is greater than the first vacuum degree, and the liquid copper is not evaporated under the second vacuum degree. According to the method, the copper immersion device is evacuated firstly, air in pores of the tungsten sponge matrix can be discharged, then a proper amount of hydrogen is introduced into the copper immersion device, the interior of the copper immersion device is in a low-vacuum state, evaporation of molten copper is inhibited, and finally, the copper liquid can be evenly immersed into the tungsten sponge matrix, so that holes appearing in the turning process of a cathode matrix due to the fact that the tungsten sponge matrix is difficult to immerse are greatly reduced, and the performance of a prepared cathode is improved.

Description

technical field [0001] The disclosure relates to the technical field of microwave vacuum electronic devices, in particular to a method and device for immersing copper in a tungsten sponge matrix. Background technique [0002] Microwave vacuum electronic devices are widely used in radar, satellite communications, electron accelerators, global positioning, controllable thermonuclear fusion and high-power microwave weapons at the frontier of the military in the future. In the case of high frequency band, it cannot be replaced by other devices. The cathode responsible for electron emission is the core part of microwave vacuum electronic devices. Its performance will directly affect the output performance and life of the microwave source, and then affect the performance and life of satellites and high-power microwave devices. An important indicator of electronic devices, to study the performance of cathode substrates, emissive materials, and cathode coatings, first of all, a con...

AI Technical Summary

Problems solved by technology

Using such a tungsten sponge matrix to prepare the cathode will affect the parameters such as the emission performance, evaporation performance and lifetime of the cathode.

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