Yttrium cathode for magnetron tungsten of microwave oven and preparation process thereof

Abstract

The invention discloses a tungsten yttrium cathode for a magnetron of a microwave oven. The tungsten yttrium cathode is characterized by comprising the following components in percentage by weight: 0.3 to 3 percent of yttrium, and the balance of tungsten. The invention also discloses a preparation process for the tungsten yttrium cathode for the magnetron of the microwave oven. The tungsten yttrium cathode has brittleness and high temperature performance of products, enhances the plasticity of the products, has good working performance, high plasticity, low production cost and no radiation, reaches the same working effect and greatly reduces the working temperature, so that the tungsten yttrium cathode can greatly reduce the requirements of high temperature resistance of electrode metal materials, meets the requirements on environmental protection, and obviously reduces the manufacturing cost at the same time.

Description

technical field [0001] The invention relates to the technical field of microwave oven magnetrons, in particular to a cathode of a microwave oven magnetron. Background technique [0002] The cathode of the microwave oven magnetron is the emitter of electrons, and it is also an integral part of the interaction space. The performance of the cathode has a great influence on the working characteristics and life of the magnetron, and is regarded as the heart of the magnetron. In order to improve the electron emission function of the cathode, thorium is added to the pure tungsten material, but the cathode products made of this alloy system have congenital defects of room temperature brittleness and high temperature brittleness, which have not been solved so far. This will lead to uncontrollable fracture of the magnetron cathode during production, transportation and use, resulting in failure of the magnetron. Seriously affect the reliability of the product and increase the manufac...

AI Technical Summary

Problems solved by technology

Lead to uncontrollable fracture of the magnetron cathode during production, transportation and use, resulting in failure of the magnetron

Seriously affect the reliability of the product and increase the manufacturing cost

In addition, thorium is a radioactive element, and thorium is used as the main raw material. During the process of smelting, production, transportation and use, it will pollute the environment. The half-life of thorium is 1.39×10 10 years, and it is difficult to recycle. Its waste products pose a pollution threat to the environment. At the same time, China currently undertakes 100% of the world’s production of magnetrons for microwave ovens. As an extremely important strategic rare earth resource, thorium can be used Therefore, from the perspective of rational use of resources, it has become an important research topic in this field to provide a tungsten cathode that can replace the existing thoriated magnetron in microwave ovens.