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Factors Affecting the Thermal Fatigue Performance of Barium Tungsten Electrodes 26

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 19

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 6

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 82

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 47

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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Factors Affecting the Electron Emission Performance of Barium Tungsten Electrodes 50

The electron emission performance of barium tungsten electrodes is affected by a combination of factors, including temperature, surface state, composition, electric field, aging and use. These influencing factors interact with each other and jointly determine the emission efficiency and service life of the electrode. 1. Temperature Temperature is a key factor affecting thermal electron emission. High temperature provides additional kinetic energy to the electrons on the electrode surface, making it easier for them to overcome the work function (i.e., work…

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Unlocking the Crystal Structure of Ammonium Metatungstate: Detection Methods Revealed 73

Ammonium metatungstate (AMT), an important inorganic compound, holds a pivotal position in modern industry due to its unique physicochemical properties. In material preparation, AMT serves as a critical raw material for producing high-performance tungsten-based materials. Through processes like thermal decomposition, AMT can yield uniform, high-purity tungsten powder, which is essential for manufacturing tungsten-based alloys and tungsten carbide powder. In the field of chemical catalysis, AMT’s distinctive crystal structure makes it an excellent catalyst or catalyst support. In the hydrorefining process…

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What Is the Catalytic Performance of Ammonium Metatungstate? 64

Ammonium metatungstate (AMT) is a significant tungsten compound, highly valued for its catalytic properties in industrial applications. For instance, in the production of denitration catalysts, AMT-based catalysts typically use titanium dioxide as a carrier. Through specialized preparation processes, AMT is loaded onto the carrier, forming a catalyst with high activity and stability, used to adsorb pollutants like sulfur and nitrogen oxides emitted from coal-fired power plants. In petroleum refining, AMT serves as a catalyst to promote cracking reactions, hydrodesulfurization, and…

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What Is the Solubility of Ammonium Metatungstate? 60

Ammonium metatungstate (AMT), with the molecular formula H??N?O??W??, is a significant tungstate compound. Structurally, AMT consists of ammonium cations and metatungstate anions, with its unique Keggin-type polyoxoanion structure contributing to its excellent solubility—a key distinction from ammonium paratungstate. The solubility of AMT refers to its physical property of dissolving in a specific solvent, indicating the extent of its dissolving capacity. Solubility is defined as the maximum amount of a substance that can dissolve in a given solvent at chemical equilibrium,…

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What is Silver Tungsten Carbide? 64

Silver tungsten carbide (AgWC) is a high-performance composite material composed of silver (Ag) and tungsten carbide (WC), usually prepared by powder metallurgy technology. This material combines the electrical advantages of silver and the mechanical strength of tungsten carbide, and has both conductive and wear-resistant properties. It plays an indispensable role in electrical engineering and is often used to manufacture electrical contacts with excellent stability and durability. 1. Material Composition Of Silver Tungsten Carbide The core components of silver tungsten carbide…

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