Preparation method for cellosilk type getter for vacuum electronic device

Abstract

The invention belongs to the technical field of getter preparation, and in particular relates to a preparation method for a cellosilk type getter for a vacuum electronic device. With ethylene as a gasphase carbon source to diffuse to surface of an iron-nickel metal wire catalyst, and carbon nano-tubes as a getter base, a paste slurry prepared by doping porous hollow ball powder is coated on the getter base to obtain the cellosilk type getter for the vacuum electronic device; sodium stannate is hydrolyzed in a water solution to form Sn(OH)6<2->, and form tin oxide nanocrystalline under hydrothermal and at high temperature to improve adsorption capacity of metal oxides on gas molecules; a ball structure of tin oxide doped with nickel oxide can greatly improve gas adsorption efficiency; long-chain polymer (-NiNTA-)n is placed in a sodium stannate water solution to promote formation of tin oxide, and a dispersed porous ball structure can adsorb more gas molecules, which enhances the gas absorption efficiency with broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of getter preparation, and in particular relates to a method for preparing a fiber filament type getter for electric vacuum devices. Background technique [0002] With the rapid development of electronic technology and vacuum technology, people continue to put forward higher requirements for the performance of electronic materials and vacuum materials, and the update and progress of getter materials has become one of the key technologies to promote their development. [0003] Getters, also known as getters, are used to obtain, maintain vacuum and purify gases, etc., and can effectively absorb certain gas molecules. There are powder, disc, ribbon, tube, ring, cup shape and many other shapes. The main functions of the getter are: [0004] (1) Increase the vacuum degree in the vacuum device in a short time, which is beneficial to shorten the exhaust time; [0005] (2) Maintain the vacuum degree of the device...

AI Technical Summary

Problems solved by technology

[0010] The main technical problem to be solved by the present invention is that most of the commonly used non-evaporable getters are prepared by powder pressure molding and sintering technology. When applied to electric vacuum devices, they are easy to de-powder when subjected to thermal stress and mechanical load, and their strength is poor. For the defect of low gas adsorption efficiency, a method for preparing a fiber-type getter for electric vacuum devices is provided

Images