Tungsten

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Factors Affecting the Burnout Rate of Barium Tungsten Electrodes 92

Barium tungsten electrodes are mainly used for certain specific applications, such as plasma welding or discharge machining, and their burnout rate (the loss rate of electrode materials caused by high temperature, arc or other factors during operation) is affected by many factors. The following are the main factors affecting the burnout rate of barium tungsten electrodes: 1. Electrode Material Composition The Role of Barium Additives: Barium is added to the tungsten matrix as a low work function material, which can…

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Factors Affecting the Emission Efficiency of Barium Tungsten Electrodes 34

The emission efficiency of barium tungsten electrodes is the result of the coupling of multiple influencing factors, mainly involving material properties, preparation process, working conditions and environment, etc. 1. Material Composition and Structure Tungsten Matrix Characteristics: The porosity and pore size distribution of the porous tungsten matrix affect the storage and diffusion of barium. Higher porosity can store more active substances, but the structural strength needs to be balanced. Impregnation Composition: For example, the ratio of BaO-Al?O?-CaO affects the release…

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Factors Affecting the Surface Roughness of Barium Tungsten Electrodes 43

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 36

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 32

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 30

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 29

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 34

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 26

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 11

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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