Tungsten

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Factors Affecting the Electronic Work Function of Barium Tungsten Electrode 35

The electronic work function of barium tungsten electrode is its core performance indicator, which directly affects its emission efficiency, operating temperature and life as a hot cathode. The factors affecting the electronic work function of barium tungsten electrode mainly include the following aspects: 1. Material Composition The chemical composition of barium and tungsten in the electrode directly affects the electronic work function. The purity of barium and tungsten and their different ratios will cause the work function to change. For…

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Factors Affecting the Life of Barium Tungsten Electrodes 28

Barium tungsten electrodes are a cathode material widely used in electronic equipment and vacuum tubes such as displays, radars, and communications equipment. Its life is affected by a combination of factors. 1. Operating Temperature High temperature will accelerate the evaporation and ablation of barium tungsten electrode materials, resulting in a shortened electrode life. Proper control of the operating temperature is an important measure to extend the life. 2. Working Current The current directly affects the thermal load and electron emission…

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Factors Affecting Microscopic Defects of Barium Tungsten Electrodes 30

Barium tungsten electrode is a cathode material widely used in vacuum electronic devices (such as electron guns and microwave tubes). Its microscopic defects have an important influence on the electron emission performance, thermal stability and mechanical strength of the electrode. The following are the main factors affecting the microscopic defects of barium tungsten electrodes: 1. Preparation Process The preparation process is one of the key factors affecting the microscopic defects of barium tungsten electrodes, which directly determines the grain size,…

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Factors Affecting the Purity of Barium Tungsten Electrode Materials 23

The factors affecting the purity of barium tungsten electrode materials run through the entire process of its preparation, processing, storage and use, involving multiple links such as raw material selection, process control, and environmental management. I. Raw Material Purity and Quality 1.1 Tungsten Matrix Raw Materials Purity Requirements: High-purity tungsten powder must be used to reduce the introduction of impurities. Pretreatment: Tungsten powder needs to be annealed, ground and screened to remove internal stress and surface impurities to ensure the…

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Factors Affecting the Stability of High-Frequency Electric Field of Barium Tungsten Electrode 24

The stability of barium tungsten electrode (usually refers to barium tungsten cathode, a hot cathode electron emission material) in high-frequency electric field (such as microwave tube, magnetron, traveling wave tube, etc.) is its core performance indicator. The factors affecting the stability of high-frequency electric field of barium tungsten electrode mainly include the following aspects: 1. Barium Supply and Active Layer Formation 1.1 Diffusion Rate of barium: At the cathode operating temperature, barium compounds (such as BaO, BaAl?O?, BaCaAl?O?) in the…

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Factors Affecting the Pulse Discharge Performance of Barium Tungsten Electrode 15

The pulse discharge performance of barium tungsten electrode is affected by the comprehensive effect of multiple influencing factors such as material composition, microstructure, preparation process, working parameters and environmental conditions. I. Material Composition and Doping Elements 1. Barium Content and Barium Compounds The low work function of barium (about 2.1 eV) significantly reduces the electron emission energy and is the key to improving pulse discharge performance. Barium oxide (BaO) impregnation can optimize electrode performance, including reducing ignition voltage, improving luminous…

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Factors Affecting the High Temperature Performance of Barium Tungsten Electrodes 20

The performance of barium tungsten electrodes at high temperatures is affected by a variety of factors, covering aspects such as material properties, preparation process and use environment: 1. Chemical Composition The purity of barium and tungsten and their proportion in the electrode directly affect the stability and conductivity at high temperatures. High-purity materials generally have better performance, while imbalanced proportions may lead to performance degradation. 2. Structure The crystal structure and microstructure of the electrode are critical to its high-temperature…

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Factors Affecting the Adaptability of Barium Tungsten Electrodes to Vacuum Environments 16

The adaptability of barium tungsten electrodes in vacuum environments is affected by many factors. In practical applications, these factors need to be optimized according to specific working conditions to ensure the best performance and longest service life of the electrodes. Factors Affecting the Adaptability of Barium Tungsten Electrodes to Vacuum Environments 1. Temperature High temperature can significantly affect the performance and service life of barium tungsten electrodes. In a vacuum environment, if the temperature is too high, it may cause…

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Ammonium Metatungstate: the “Silent Guardian” in Flame-Retardant Fabrics 23

CTIA GROUP LTD’s Ammonium Metatungstate (AMT) is a white or pale yellow crystalline powder with high water solubility, good solution stability, and acidity, as well as high chemical stability. However, under specific conditions (e.g., high temperatures), it may decompose or undergo transformation reactions. These properties make AMT a strong candidate for applications in flame-retardant fabrics. I. Why AMT is Used in Flame-Retardant Fabrics AMT’s excellent chemical stability ensures that it maintains its structure and performance in complex chemical environments, preventing…

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Ammonium Metatungstate: The “Silent Powerhouse” in Catalysis 26

In the fascinating world of chemistry, Ammonium Metatungstate (AMT), produced by CTIA GROUP LTD, shines as a subtle yet brilliant star with its unique “personality.” It is a compound formed by the tight bonding of ammonium cations and metatungstate anions, with the molecular formula H28N6O41W12. Beyond its excellent solubility and thermochemical stability, AMT also boasts remarkable catalytic properties. Why AMT Excels in Catalysis CTIA GROUP LTD’s Ammonium Metatungstate stands out in the catalytic field due to its distinctive intrinsic properties.…

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