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Long-period cathode for space traveling wave tube and preparation method of long-period cathode

Active Publication Date: 2015-07-08
HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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Problems solved by technology

The cathode is the heart of the traveling wave tube. The long life of the space traveling wave tube must first be based on the long life of the cathode. Usually the cathode is required to have a life span of 100 000h or even 150 000h. The life of the existing cathode cannot meet this requirement, which hinders the space Development of traveling wave tube

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  • Long-period cathode for space traveling wave tube and preparation method of long-period cathode
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  • Long-period cathode for space traveling wave tube and preparation method of long-period cathode

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Embodiment Construction

[0024] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0025] Such as figure 1 Shown is a flow chart of the preparation method of the long-life cathode for the space traveling wave tube.

[0026] A method for preparing a long-life cathode for a space traveling wave tube, comprising the following steps:

[0027] Step S1, pressing the cathode outer layer substrate and the cathode inner layer substrate.

[0028] Step S2, performing hydrogen sintering on the cathode outer layer substrate and the cathode inner layer substrate.

[0029] Step S3, impregnating the sintered cathode outer substrate and the cathode inner substrate with 612 aluminate.

[0030] Step S4, using tungsten-cobalt alloy solder W20-Co to braze the cathode molybdenum cylinder, the cathode outer layer substrate and the cathode inner l...

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Abstract

The invention discloses a preparation method of a long-period cathode for a space traveling wave tube. The preparation method comprises the following steps of: pressing an outer layer substrate and an inner layer substrate of a cathode; sintering the outer layer substrate and the inner layer substrate of the cathode with hydrogen; immersing the sintered outer layer substrate and the sintered inner layer substrate of the cathode inside 612 aluminate; carrying out braze soldering on a cathode molybdenum barrel, the outer layer substrate and the inner layer substrate of the cathode by utilizing tungsten cobalt alloy soldering flux W20-Co; and carrying out ion etching on a transmitting surface of the cathode, and covering a layer of osmium (Os)- iridium (Ir)-aluminum (Al) film on the transmitting surface. Both the inner layer substrate and the outer layer substrate of the cathode, which are sintered and immersed, are more durable, and the service life of the cathode after being soldered with the cathode molybdenum barrel is long. In addition, the invention also provides a long-period cathode for the space traveling wave tube.

Description

technical field [0001] The invention relates to a cathode for a space traveling wave tube, in particular to a long-life cathode for a space traveling wave tube and a preparation method. Background technique [0002] A large number of satellites are in the vast sky, moving with the earth every second. Through their reception and transmission of various information, they have communicated the north and south of the earth, making the earth "smaller", making the world "nearer", and making the whole world develop and progress. Satellites serving various purposes have effectively promoted the development of corresponding undertakings. The space traveling wave tube is the core component of various application satellites, and it is not maintainable. Some satellites need to have a life span of more than ten years or even longer, so the space traveling wave tube must be highly reliable and long-lived. The cathode is the heart of the traveling wave tube. The long life of the space tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/02H01J23/04
Inventor 吴华夏邓清东贺兆昌宋田英张丽
Owner HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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