Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Dipped barium wolfram cathode and process for its manufacture

A technology of barium tungsten cathode and cathode body, which is applied in the field of impregnated barium tungsten cathode and the preparation of the impregnated barium tungsten cathode, which can solve the problems of complicated process, insufficient life, and insufficient emission current of impregnated barium tungsten cathode, and achieve process repeatability And good stability, shorten the production cycle, facilitate the effect of electron emission

Inactive Publication Date: 2007-03-07
HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has defects such as complicated process, high difficulty, poor repeatability and stability, and high cost. In addition, with the increasing requirements of high-power electronic tubes, the original traditional impregnated barium-tungsten cathode has insufficient emission current and long life. The disadvantages of high temperature and insufficient work stability are increasingly unable to keep up with the development of the situation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dipped barium wolfram cathode and process for its manufacture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The cathode body prepared by the present invention has a diameter of 3.6mm and a thickness of 2mm.

[0032] Process 1:

[0033] 1) Put tungsten powder and chromium oxide into a 500°C hydrogen furnace for annealing to thoroughly purify and enhance their plasticity.

[0034] 2) Weigh 1 gram of chromium oxide and 19 grams of tungsten powder (both converted to 100%, the purity of chromium oxide is 95%, and the purity of tungsten powder is 95.2%), grind the two materials to 300 mesh, and mix well , take 200 mg of the mixture, and press it into a cathode body with a molybdenum cylinder inside.

[0035] 3) Put the cathode body prepared in step 2 into a hydrogen furnace, and keep it warm for 5 hours when the temperature reaches 1700°C.

[0036] 4) Place the cathode body prepared in step 3 in aluminate powder, immerse in a hydrogen atmosphere at 1600° C. for 3 minutes, and remove the floating salt after immersion with tungsten wool.

[0037] 5) Install the heater.

[0038] D...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

This invention discloses one dipping barium-tungsten cathode with multi functions and its process method, wherein, the cathode comprises addictive, molybdenum cylinder, heater, aluminates; the addictive is composed of iridium powder ruthenium powder and tungsten powder. The process method comprises the following steps: annealing the metal powder and weighting three materials less than 200 for mixing and using molybdenum powder mode to process cathode; heating to 1500-2000 degree less than one hour; putting it into aluminates powder for dipping for 0.5 to 10 minutes in 1500 to 2000 degrees.

Description

technical field [0001] The invention relates to a barium tungsten cathode on an electronic tube device, in particular to an impregnated barium tungsten cathode containing additives. [0002] The present invention also relates to a method for preparing the impregnated barium tungsten cathode. Background technique [0003] Compared with other cathodes, the traditional impregnated barium tungsten cathode has the characteristics of low surface work function, large emission current, long life, good working stability, strong resistance to poisoning and ion bombardment, so as an electron source, Widely used in various high-power electronic tube devices, such as klystrons, magnetrons, traveling wave tubes, and high-definition and high-brightness picture tubes. However, it has defects such as complicated process, high difficulty, poor repeatability and stability, and high cost. In addition, with the increasing requirements of high-power electronic tubes, the original traditional imp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01J1/14H01J1/20H01J9/02
Inventor 张红卫
Owner HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com