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Hot carrier assembly used for space traveling-wave tube and preparation method thereof

A technology of traveling wave tubes and thermotrons, which is applied in the field of microwave vacuum electronic devices, can solve the problems of high power consumption of thermal subassemblies, failure to meet the development of space traveling wave tubes, and low reliability, so as to improve strength and thermal efficiency, and improve thermal efficiency and impact resistance, high reliability

Active Publication Date: 2015-04-22
HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the heat source of the cathode, the performance of the thermal subassembly is directly related to the indicators of long life, low power consumption and high reliability of the cathode. According to statistics, one-third of the failure of the cathode is caused by the damage of the thermal subassembly. The thermal sub-components have high power consumption and low reliability, which cannot meet the needs of the development of space traveling wave tubes

Method used

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  • Hot carrier assembly used for space traveling-wave tube and preparation method thereof
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the thermal subassembly for the space traveling wave tube comprises the following steps;

[0026] (1) Use tungsten-rhenium alloy wire and wind it into a short cylindrical spiral heater, and shape it,

[0027] (2) A layer of electric vacuum alumina is electrophoresed on the surface of one end of the short cylindrical spiral heater, and the thickness of the electric vacuum alumina layer is 80 μm;

[0028] (3) Hydrogen sintering is carried out at one end of the short cylindrical helical heater treated in step (2), and the electrophoresis-treated heater is kept in 1700°C wet hydrogen for 2 minutes, and the thickness of the electrophoresis alumina layer after sintering is 50 μm;

[0029] (4) Place the heater treated in step (3) in the cathode molybdenum cylinder, and fill the gap between the cathode molybdenum cylinder and the heater with electric vacuum alumina powder;

[0030] (5) Carry out hydrogen sintering to the thermal sub-assembly after ste...

Embodiment 2

[0032] The preparation method of the thermal subassembly for the space traveling wave tube comprises the following steps;

[0033] (1) Use tungsten-rhenium alloy wire and wind it into a short cylindrical spiral heater, and shape it,

[0034] (2) A layer of electric vacuum alumina is electrophoresed on the surface of one end of the short cylindrical spiral heater, and the thickness of the electric vacuum alumina layer is 60 μm;

[0035] (3) Hydrogen sintering is carried out at one end of the short cylindrical helical heater treated in step (2), and the electrophoresis-treated heater is kept in 1650 wet hydrogen for 4 minutes, and the thickness of the electrophoretic alumina layer after sintering is 30 μm;

[0036] (4) Place the heater treated in step (3) in the cathode molybdenum cylinder, and fill the gap between the cathode molybdenum cylinder and the heater with electric vacuum alumina powder;

[0037] (5) Perform hydrogen sintering on the thermal sub-assembly after step (4...

Embodiment 3

[0039] The preparation method of the thermal subassembly for the space traveling wave tube comprises the following steps;

[0040] (1) Wind one end of the heater into a helical structure and shape it;

[0041] (2) A layer of electric vacuum alumina is electrophoresed on the surface of one end of the helical structure, and the thickness of the electric vacuum alumina layer is 70 μm;

[0042] (3) Sinter the electrophoresis-treated thermophiles with hydrogen, and place the electrophoresis-treated thermophiles in wet hydrogen at 1680°C for 3 minutes, and the thickness of the sintered electrophoretic alumina layer is 40 μm;

[0043] (4) Place the heater treated in step (3) in the cathode molybdenum cylinder, and fill the gap between the cathode molybdenum cylinder and the heater with electric vacuum alumina powder;

[0044] (5) Carry out hydrogen sintering to the thermal sub-assembly after step (4), put the thermal sub-assembly in 1750°C wet hydrogen for 10 minutes, so that the th...

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Abstract

The invention discloses a hot carrier assembly used for a space traveling-wave tube and preparation method thereof. The hot carrier assembly comprises a hot carrier and a cathode molybdenum cylinder, wherein one end of the hot carrier is a spiral line structure, and an electric vacuum aluminum oxide layer is arranged on the surface at one end of the hot carrier with the spiral line structure; and one end of the hot carrier with the spiral line structure is arranged in the end of the hot carrier with the spiral line structure, and an electric vacuum aluminum oxide layer is filled between the hot carrier and the cathode molybdenum cylinder. The preparation method of the hot carrier assembly comprises the five big steps. The hot carrier assembly used for a space traveling-wave tube provided by the invention has high heat efficiency and strong reliability and can meet the development demands of the space traveling-wave tube.

Description

technical field [0001] The invention relates to the field of microwave vacuum electronic devices, in particular to a thermosubassembly for a space traveling wave tube and a preparation method thereof. Background technique [0002] The space traveling wave tube is the core component of various application satellites, and it is not repairable. 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; secondly, the space traveling wave tube The wave tube must have high efficiency, because satellites are running in the sky, and their energy is limited, and 80% to 90% of the energy on the star is used for traveling wave tubes, so traveling wave tubes must have as high efficiency as possible to save On-board energy; again, space traveling wave tubes must have strong shock resistance and vibration resistance so that they can withstand the harsh environment of satellite launches. The cath...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J23/00H01J23/04H01J9/02
Inventor 吴华夏宋田英邓清东贺兆昌张丽
Owner HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE