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Cathode heater assembly and preparation method thereof

A heater and cathode technology, applied in the field of cathode heater assembly and its preparation, can solve the problems of complex preparation process, long preheating time, poor reliability, etc., and achieve high heating temperature, short preheating time, and good vibration resistance performance. Effect

Active Publication Date: 2020-06-05
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this traditional cathode heating subassembly has many defects, such as long warm-up time, poor reliability, large volume, low efficiency, magnetic field, complicated preparation process, etc.

Method used

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  • Cathode heater assembly and preparation method thereof
  • Cathode heater assembly and preparation method thereof
  • Cathode heater assembly and preparation method thereof

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preparation example Construction

[0027] An embodiment of the present invention provides a method for preparing a cathode heater subassembly, the preparation method comprising: cutting a metal sheet with a preset thickness to obtain a rectangular metal strip, and using the rectangular metal strip as a heater 5; The heater 5 is welded to the surface of the cathode base 1 , which is the surface opposite to the emitting surface of the cathode base 1 . that is figure 2 In the viewing angle shown, the upper surface of the cathode substrate 1 is the emitting surface, and the lower surface is the surface opposite to the emitting surface. At this time, the heater 5 is welded to the lower surface of the cathode base 1 .

[0028] As the metal strip material in the present invention, the following conditions must be met: 1. The evaporation rate is small at the working temperature or the high temperature required in the process. 2. The expansion coefficient is similar to that of the cathode metal material. 3. Good che...

Embodiment 1

[0039] This embodiment provides a cathode thermal subassembly, see figure 2 , the assembly includes: a cathode, and a heater 5 welded to the back surface of the cathode; wherein, the cathode includes a cathode substrate 1, the heater 5 is welded to the surface of the cathode substrate 1, and the heater 5 The thickness of the heater is 0.05mm, the width of the heater 5 is 2mm consistent with the diameter of the cathode base 1, and the length of the heater 5 is 3.5 times the diameter of the cathode base 1. The material of the heater 5 is tungsten.

Embodiment 2

[0040] Embodiment 2: This embodiment provides a method for preparing a cathode heating subassembly. The method includes the following steps:

[0041] Step 1. Cut the tantalum metal sheet with a thickness of 0.05mm into a heater of the required size, a strip-shaped metal strip (i.e. a rectangular metal strip); the width of the metal strip is consistent with the size of the cathode, which is 2mm; the length is the diameter of the cathode 3.5 times, that is 7mm. The metal strip is the heater.

[0042] Step 1. Weld the cathode substrate with a diameter of 2 mm on the metal strip by laser welding.

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Abstract

The invention provides a cathode heater assembly and a preparation method thereof. The preparation method comprises the following steps of cutting a metal sheet with a preset thickness to obtain a rectangular metal strip, and taking the rectangular metal strip as a heater; and welding the heater on the surface of the cathode substrate, wherein the surface is opposite to the emitting surface of thecathode substrate. The cathode heater assembly is simple in structure, the prepared cathode heater assembly is high in yield, short in preheating time, small in size, high in heat efficiency, high inheating temperature, uniform in heating, good in vibration resistance, good in thermal shock resistance, high in reliability and simple in manufacturing method, and is free of short circuit.

Description

technical field [0001] The invention relates to the technical field of microwave devices, in particular to a cathode heating 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. After decades of development, although the theory of conventional microwave vacuum electronic devices and related technologies has been basically mature, modern high-tech microwave devices continue to put forward new development requirements for the power, frequency, bandwidth and other working characteristics of microwave signals. These demands are mainly manifested in higher frequency, higher pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/04H01J9/08H01J1/22H01J1/146
CPCH01J1/146H01J1/22H01J9/04H01J9/08
Inventor 刘燕文王国建田宏朱虹李芬孟鸣凤赵恒邦谷兵
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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