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Flat emitter and X-ray tube

A technology of X-ray tube and emitter, which is applied in the medical field to achieve the effect of not being easily thermally deformed or cracked, high emission efficiency, and high hardness

Active Publication Date: 2021-04-09
WUHAN UNITED IMAGING HEALTHCARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to provide a flat panel emitter of an X-ray tube and an X-ray tube aiming at the problem of how to improve the service life of the flat panel emitter.

Method used

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  • Flat emitter and X-ray tube
  • Flat emitter and X-ray tube
  • Flat emitter and X-ray tube

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Embodiment Construction

[0026] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0027] The serial numbers numbered for components in this document, such as "first", "second", etc., are only used to classify the described objects and do not have any sequence or technical meaning. The "connection" and "connection" mention...

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Abstract

The invention relates to a flat plate emitter of an X-ray tube. The flat plate emitter of the X-ray tube comprises a first surface and a second surface which are opposite to each other, the material of the flat plate emitter comprises a tungsten-rhenium alloy material, the content of rhenium metal in the tungsten-rhenium alloy material is increased in the first direction, and the direction from the first surface to the second surface is the first direction. And the flat emitter is made of a tungsten-rhenium alloy material. The tungsten-rhenium alloy material has the characteristics of high melting point, high hardness, high plasticity and high recrystallization temperature (2500 DEG C or above), and the ductile-brittle transition temperature of tungsten is reduced to room temperature or below by the tungsten-rhenium alloy material. The recrystallization temperature of the tungsten-rhenium alloy material is very high, thermal deformation or cracks are not likely to happen when the tungsten-rhenium alloy material is subjected to thermal shock, and then the service life of the flat emitter is prolonged.

Description

technical field [0001] The application relates to the field of medical technology, in particular to a flat emitter and an X-ray tube. Background technique [0002] The flat panel emitter in an X-ray tube is generally the refractory metal tungsten. When a voltage is applied to both ends of the flat emitter, the flat emitter itself is resistive, resulting in heat. Metal tungsten emits electrons when the temperature of the flat emitter reaches. The brittle transition temperature of tungsten is 150°C-450°C. Tungsten materials become very brittle after recrystallization after high temperature use, and are easily deformed or broken under thermal shock or vibration. Therefore, the thermal shock resistance of the flat emitter is poor, which affects the service life of the flat emitter. Moreover, the resistivity of pure tungsten is low, and the resistance value of the emitter is low. It needs a large current to raise the temperature of the emitter to the electron emission temperat...

Claims

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Application Information

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IPC IPC(8): H01J35/06
CPCH01J35/064
Inventor 马新星张曦
Owner WUHAN UNITED IMAGING HEALTHCARE CO LTD
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