Composite heater assembly and preparation method thereof

A heater and component technology, which is applied in the field of composite heater assemblies and their preparation, can solve the problems of insufficient thermal efficiency, high working temperature of the heater, low heating efficiency, etc., achieves efficiency without magnetic field, increases resistivity, and improves thermal efficiency Effect

Pending Publication Date: 2021-12-17
AEROSPACE INFORMATION RES INST CAS
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  • Abstract
  • Description
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Problems solved by technology

However, this traditional heating method has some disadvantages: the preheating time of the cathode becomes longer; the heating efficiency is low; the working temperature of the heating element is high; the vibration and shock resistance is poor
However, this traditional thermal subassembly still has many defects, such as short circuit of the hot wire, large volume, insufficient thermal efficiency, magnetic field generated on the surface of the cathode, which affects the electron emission performance, etc.

Method used

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  • Composite heater assembly and preparation method thereof
  • Composite heater assembly and preparation method thereof
  • Composite heater assembly and preparation method thereof

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preparation example Construction

[0042] According to an embodiment of the present disclosure, such as image 3 As shown, the preparation method of composite thermal subassembly includes, for example:

[0043] S310, mixing the insulating powder and the metal powder to obtain a mixed powder, wherein the insulating powder and the metal powder expand and contract synchronously.

[0044] According to the embodiment of the present disclosure, the expansion coefficient of the insulating powder material is similar to that of the metal powder material. Therefore, during the preparation and use of the composite thermal subassembly, the structure of the composite thermal subassembly 5 is stable and will not be damaged due to thermal expansion and cooling contraction. Create defects within the material. The insulating material can be aluminum oxide, beryllium oxide, boron nitride or aluminum nitride, etc., and the metal material can be metal powder such as tungsten, rhenium or molybdenum or any mixed metal powder. Alte...

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Abstract

The invention provides a composite heater assembly and a preparation method thereof. The method comprises the following steps: mixing insulating powder and metal powder to obtain mixed powder, and enabling the insulating powder and the metal powder to expand and contract synchronously; compacting the mixed powder to obtain a bar; sintering the bar to obtain a green body; turning the green body to obtain a composite heater (5); and bonding a cathode cylinder (2) and an electrode (7) to the two ends of the composite heater (5) through welding flux (6), so as to obtain the composite heater assembly. The preparation method disclosed by the invention is simple in process, and the cathode composite heater assembly which is high in reliability, small in size, high in efficiency, uniform in heating and free of a magnetic field can be prepared.

Description

technical field [0001] The disclosure relates to the technical field of microwave vacuum electronic devices, in particular to a composite thermal subassembly and a preparation method thereof. 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 in the future military frontier. Their unique functions and superior performance, especially in high-power and In the case of high frequency band, it cannot be replaced by other devices. The part that heats the cathode in the microwave vacuum device is called the thermoson or the thermoson assembly. [0003] In recent years, the requirements of fast start-up and long life of microwave devices have posed higher technical challenges to the thermal performance, and it is necessary to do a lot of in-depth and meticulous research work on how to shorten the warm-up t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/08H01J9/18H01J1/22H01J23/04
CPCH01J9/08H01J9/18H01J1/22H01J23/04
Inventor 刘燕文孟鸣凤朱虹王国建赵恒邦王小霞
Owner AEROSPACE INFORMATION RES INST CAS
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