Tungsten

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Stability of Barium Tungsten Electrodes in High-Power Laser Systems 31

The stability of barium tungsten electrodes in high-power laser systems is a key factor in ensuring system performance consistency and service life. Barium tungsten electrodes are usually made of tungsten, which is widely used in laser systems due to its high melting point and good durability, while the addition of barium is usually used to enhance the electron emission performance of the electrode. In high-power laser applications, the electrodes need to withstand extreme conditions, including high temperatures, electrical stress, and…

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Optimization of Electron Emission Uniformity of Barium Tungsten Electrode 33

Barium tungsten electrode is a hot cathode material widely used in vacuum electronic devices, known for its high electron emission ability and stability. The uniformity of electron emission is crucial to improving device performance, optimizing current distribution and extending service life. 1. Factors Affecting Electron Emission Uniformity The uniformity of electron emission is affected by many factors, the following are some of the main aspects: (1) Matrix structure: The pore structure and pore size distribution of the tungsten matrix play…

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Relationship Between the Micromorphology and Performance of Barium Tungsten Electrode 29

There is a close relationship between the micromorphology of barium tungsten electrode and its performance. The micromorphology mainly includes characteristics such as grain size, porosity, surface roughness, etc. These characteristics directly affect the working performance of the electrode under high temperature and high current density environment. 1. Electron Emission Performance Electron emission performance is the core characteristic of barium tungsten electrode. It is widely used in equipment such as electron tubes and gas discharge lamps due to its excellent electron…

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Application of Barium Tungsten Electrode in Photomultiplier Tube 32

Barium tungsten electrode plays an important role as cathode material in photomultiplier tube. Photomultiplier tube is a highly sensitive photodetector, which is widely used in particle physics, nuclear physics, astrophysics and other fields to detect weak light signals. Its working principle is to use the photoelectric effect to convert light signal into electronic signal, and then amplify the electronic signal through the electron multiplication mechanism, and finally output the electrical signal. 1. The Role of Barium Tungsten Electrode The cathode…

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High Temperature Oxidation Resistance Mechanism of Barium Tungsten Electrode 13

Barium tungsten electrode (W-Ba electrode) is often used in discharge lamps, vacuum tubes and other devices in high temperature environment due to its excellent high temperature oxidation resistance. Its high temperature oxidation resistance mechanism is mainly closely related to the chemical properties of barium and its role in the tungsten matrix. 1. Low work function and electron emission ability of barium: Barium (Ba) is an alkaline earth metal with a low work function, which can significantly reduce the surface work…

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Effect of Heat Treatment on Barium Tungsten Electrode Performance 10

The optimization of the performance of barium tungsten electrode by heat treatment is a complex process, involving a comprehensive balance of microstructure, emission performance, mechanical properties and chemical stability. By precisely controlling heat treatment parameters (such as temperature, time, atmosphere and cooling rate), the electron emission efficiency, mechanical strength and service life of barium tungsten electrode can be significantly improved. The specific process needs to be customized according to the application scenario of the electrode (such as high temperature environment…

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Analysis of the Anti-Ablation Performance of Barium Tungsten Electrode 11

Barium tungsten electrode is widely used in high-intensity gas discharge lamps, electron tubes and other fields due to its excellent electron emission performance and high stability. Its anti-ablation performance, that is, the ability to resist material loss under extreme conditions such as high temperature and high current, is a key indicator for evaluating its service life and stability. Ablation refers to the phenomenon that the surface material of the electrode is lost due to physical or chemical processes under harsh…

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Electron Emission Mechanism of Barium Tungsten Electrode 13

Barium tungsten electrode is a high-performance thermal electron emission cathode widely used in vacuum electronic devices (such as high-power microwave tubes, X-ray tubes, etc.). Its electron emission mechanism involves complex physical and chemical processes, and the core lies in the single atomic layer coverage of barium (Ba) atoms on the surface of porous tungsten substrate. 1. Basic Structure and Preparation of Barium Tungsten Electrode Porous tungsten substrate: a porous structure formed by sintering tungsten powder. Impregnation of active substances: impregnation…

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Thermionic Emission Characteristics of Barium Tungsten Electrode 15

Barium tungsten electrode is an electron emission material composed of tungsten (W) and barium (Ba) compounds. Its thermal electron emission characteristics have important applications in vacuum electronic devices, light sources, medical and industrial fields. 1. Composite Structure Advantages of Barium Tungsten Electrode The tungsten porous matrix provides high melting point and mechanical strength to ensure the stability of the electrode at high temperature. Active substances such as barium compounds are added through the impregnation process to significantly reduce the work…

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The Role of Barium Tungsten Electrode in High-Resolution Microscopy 12

Barium tungsten electrode plays a vital role in high-resolution microscopy, mainly used as an electron source, providing a high-quality electron beam to achieve high-resolution imaging. 1. Basic Composition of Barium Tungsten Electrode Barium tungsten electrode is usually made of tungsten porous matrix impregnated with barium salt. This combination of materials makes it a commonly used cathode in electron microscopes for generating electron beams, with high stability, long life and other characteristics. 2. Working Principle of Barium Tungsten Electrode Barium tungsten…

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