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Factors Affecting the Surface Roughness of Barium Tungsten Electrodes 39

The factors affecting the surface roughness of barium tungsten electrodes involve multiple links such as material preparation, working environment, processing technology and post-treatment, and their formation mechanism is complex and interrelated. I. Influence of Material Composition and Preparation Process 1. Barium Tungsten Ratio and Emission Material Penetration Ratio Optimization: The content of barium (Ba) directly affects the electron emission performance and thermal stability of the electrode. If the barium content is too high, it may cause uneven distribution of BaO…

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Factors Affecting the Thermal Expansion Coefficient of Barium Tungsten Electrode 31

The thermal expansion coefficient of barium tungsten electrode is mainly affected by factors such as material composition (ratio of barium to tungsten, doping elements), microstructure (grain size, porosity), preparation process (sintering, pressing, heat treatment) and use environment (temperature, atmosphere). 1. Material Composition and Chemical Composition Barium Content: Barium tungsten electrode is usually composed of tungsten matrix and barium-containing compounds (such as barium calcium aluminate). The ratio of barium compound to tungsten matrix directly affects the thermal expansion coefficient. Barium compounds…

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Factors Affecting the Grain Size of Barium Tungsten Electrode 27

The grain size of barium tungsten electrode is crucial to its performance (such as electron emission ability, thermal stability and mechanical strength), and its influencing factors can be summarized as follows: 1. Raw Material Characteristics Powder Particle Size and Uniformity: The smaller and more uniformly distributed the initial tungsten powder and barium salt particle size, the easier it is to control grain growth during sintering. Nanoscale powder can promote densification and refine grains. Barium Content and Existence Form: Barium usually…

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Factors Affecting the Arc Erosion Resistance of Barium Tungsten Electrodes 25

The arc erosion resistance of barium tungsten electrodes is the core indicator of its resistance to material loss, shape change or performance degradation under the action of arc, which directly affects its service life and stability. This ability is affected by multiple factors. The following is a systematic analysis from four dimensions: material properties, manufacturing process, use conditions and environmental interaction: I. Material Composition and Microstructure 1. Barium Tungsten Ratio and Alloying Effect Barium Content: Barium significantly improves electron emission…

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Factors Affecting the Corrosion Resistance of Barium Tungsten Electrodes 24

The corrosion resistance of barium tungsten electrodes is the comprehensive result of influencing factors such as material properties, working environment and use conditions. Optimizing electrode composition, improving manufacturing process, controlling working environment (such as using inert gas protection or reducing working temperature) and surface modification are effective ways to improve corrosion resistance. 1. Material Composition and Purity Barium Content: Barium, as an active element, affects the chemical stability of the electrode. Excessive barium content may cause the electrode surface to…

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Factors Affecting the Thermal Fatigue Performance of Barium Tungsten Electrodes 28

To improve the thermal fatigue performance of barium tungsten electrodes, multi-scale coordinated optimization is required: regulating the composition from the atomic scale, designing the strengthening phase at the microscale, and optimizing the geometry at the macroscale to reduce stress concentration. The factors affecting the thermal fatigue performance of barium tungsten electrodes can be summarized into the following key aspects: 1. Material Composition and Microstructure Composition Regulation: The content of barium directly affects the electron emission performance and structural stability. Excessive…

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Factors Affecting the Conductivity of Barium Tungsten Electrode 21

The conductivity of barium tungsten electrode is the result of the combined effect of material composition, preparation process, working environment, surface state and electric field conditions. These influencing factors need to be comprehensively optimized in practical applications. I. Material composition and microstructure 1. Barium Tungsten Ratio As a low work function material, barium can significantly reduce the overall work function and improve the conductivity when combined with tungsten. However, too high or too low barium content will lead to uneven…

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Factors Affecting the Antioxidant Properties of Barium Tungsten Electrodes 8

The antioxidant properties of barium tungsten electrodes are affected by many factors, including material formula, preparation process, surface treatment, use environment, etc. The main factors affecting the antioxidant properties of barium tungsten electrodes: 1. Material Composition Barium Content: As an active element, barium can reduce the work function of the electrode and promote electron emission, but excessive barium content may cause unstable surface structure and affect antioxidant properties. Tungsten Matrix Purity: The purity and trace impurities (such as oxygen, carbon,…

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Factors Affecting the Surface Microstructure of Barium Tungsten Electrode 84

Barium tungsten electrode is an electrode material widely used in the field of electron emission, and its surface microstructure has a decisive influence on electron emission performance, thermal stability and service life. The surface microstructure mainly includes characteristics such as grain size, porosity, surface morphology and microscopic defects, which directly affect the work function, electron emission uniformity and thermal fatigue resistance of the electrode. The main factors affecting the surface microstructure of barium tungsten electrode are as follows: 1. Material…

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Factors Affecting the Thermal Stability of Barium Tungsten Electrodes 49

The thermal stability of barium tungsten electrodes, that is, their ability to maintain physical and chemical properties at high temperatures, is crucial to their performance and service life. The following are the main factors affecting the thermal stability of barium tungsten electrodes: 1. Material Composition The ratio of barium and tungsten directly affects the thermal stability of the electrode. Tungsten has an extremely high melting point (about 3422°C), which gives the electrode a high temperature resistance basis; while barium can…

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