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A method for taking out filament perfusion for cathode

A technology of perfusion and filament, applied in cold cathode manufacturing, electrode system manufacturing, discharge tube/lamp manufacturing, etc., can solve the problem of reducing the potting quality of filament components, reducing the insulation performance of insulating powder, changing the potting and sintering temperature, etc. problems, to achieve the effect of good internal and external consistency, avoid short circuit or open circuit, and suitable melting point

Active Publication Date: 2017-08-11
HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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AI Technical Summary

Problems solved by technology

The traditional removal method is to mechanically remove the molybdenum cylinder with the help of diagonal pliers, which can easily cause metal elements in the perfusion, reduce the insulation performance of the insulating powder, change the potting and sintering temperature, and then reduce the potting quality of the filament assembly

Method used

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  • A method for taking out filament perfusion for cathode
  • A method for taking out filament perfusion for cathode

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0024] The invention relates to a method for taking out filament perfusion for cathode, comprising the following steps:

[0025] 1) Prepare pickling solution 2, wherein the formula in pickling solution 2 is: 25 g / L sulfuric acid and 50 g / L nitric acid. Pour a certain amount of 500ml of distilled water into the 1L beaker 1, slowly pour the calculated sulfuric acid into it, and stir at the same time, measure out the calculated nitric acid, and add it to the solution while stirring carefully to cool the resulting solution to room temperature.

[0026] 2) Prepare an alkaline solution, wherein the formula in the alkaline solution is: ammonia water 60 g / L. Pour a certain amount of 500ml of distille...

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Abstract

The invention discloses a method for taking out a cathode filament perfusion, which comprises the following steps: 1) preparing a pickling solution; 2) preparing an alkaline solution; 3) putting a molybdenum cylinder with the perfusion into the pickling solution Etching; 4) Put the etched perfusion into an alkaline solution for neutralization; 5) Rinse the perfusion under deionized water and check the pH value; 6) Put the perfusion into an oven for Dry and store in a dry bottle. The beneficial effects achieved by the present invention are as follows: 1. The surface quality of the perfusate is good, and the surface fineness is good without obvious impurities. 2. The uniformity of the pouring material is good, and the internal and external consistency is good. 3. The process of taking out filament perfusion material for cathode has high stability. 4. The potting material has a suitable melting point and can meet the requirements for the cathode of a traveling wave tube after potting and sintering. The invention is applied to an X-band airborne traveling wave tube, which greatly increases the on-off times of the filament assembly, avoids the phenomenon of short circuit or open circuit of the filament assembly, and makes the life of the cathode reach more than 15,000 hours.

Description

technical field [0001] The invention relates to a method for taking out a filament filling material for a cathode, and belongs to the technical field of cathode manufacturing of traveling wave tubes. Background technique [0002] The cathode is a key factor affecting the life of a traveling wave tube. When designing the cathode, it is necessary to fully consider many factors such as ion bombardment resistance, high voltage resistance, poisoning resistance, vibration resistance, impact resistance, spark resistance, emission capability, and long life. Among them, vibration resistance is very important to the life of the cathode. Factors affecting the cathode vibration resistance include cathode brazing, spot welding, laser welding, and filament potting and sintering. During the preparation of the filament assembly, the filament needs to be potted and sintered with insulating powder. In the molybdenum cylinder, the quality of the potting determines the insulation and thermal c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/02
CPCH01J9/02
Inventor 孟昭红陈爱民于晨晨卞磊王莹
Owner HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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