Tungsten

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What Is Ammonium Metatungstate? 35

Ammonium metatungstate (AMT) produced by CTIA GROUP LTD is an inorganic composite salt with the molecular formula H??N?O??W??, formed by the combination of ammonium cations and metatungstate anions. It appears as a white crystalline powder or slightly yellowish solid. At the microscopic level, its atoms are arranged in an orderly manner through specific chemical bonds, forming a stable chemical structure that endows AMT with unique chemical properties. I. Basic Properties of Ammonium Metatungstate Solubility: AMT is highly soluble in water,…

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Application of Barium-Tungsten Electrodes in the Laser Field 43

The application of barium-tungsten electrodes in the laser field is primarily attributed to their excellent electron emission performance and high-temperature stability, particularly in gas discharge lasers where they play a critical role. Below is a detailed analysis of their key applications and advantages: I. Main Application Scenarios 1. CO? Lasers Mechanism: As discharge cathodes, barium-tungsten electrodes maintain gas discharge in CO? lasers, exciting CO? molecules to generate laser output. Advantages: High-temperature resistance: The tungsten matrix withstands discharge temperatures (>1000°C), preventing…

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Application of Barium Tungsten Electrodes in Lighting 39

The application of barium tungsten electrodes in the lighting field mainly focuses on special light sources such as high-intensity discharge lamps (HID lamps), stroboscopes, and xenon flash lamps. Their unique advantages and limitations jointly shape the boundaries of application scenarios. The following analysis combines their characteristics with application scenarios: I. Core Characteristics Supporting Lighting Applications 1. Low Work Function and High Current Density The work function of barium tungsten electrodes is only 1.6 eV (compared to about 4.5 eV for…

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Applications of Barium Tungsten Electrodes in the Electronics Field 32

Barium Tungsten Electrodes have a wide range of applications in the electronics field, primarily due to their combination of barium’s low work function (which facilitates electron emission) and tungsten’s mechanical strength and heat resistance. Below are some of their key application scenarios in the electronics domain: 1. Cathode Ray Tubes (CRT) Barium tungsten electrodes are commonly used as hot cathode materials in CRT displays. Thanks to their low work function and high electron emission efficiency, they can emit a large…

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Application Fields of Barium Tungsten Electrodes 27

As a high-performance electronic material, barium tungsten electrodes demonstrate wide-ranging applications across multiple critical fields due to their low work function (1.6 eV), high current density (10 A/cm2), excellent ignition performance, and resistance to poisoning. Below are their primary application fields and technical characteristics: I. Lighting and Light Source Applications 1. High-Intensity Discharge Lamps (HID Lamps) Applications: Road lighting, industrial illumination, sports venues, and other scenarios requiring high brightness and long lifespan. Advantages: The low work function of barium tungsten…

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Application Scenarios of Barium Tungsten Electrodes 24

The Barium Tungsten Electrode is primarily used in specific industrial and technological application scenarios, particularly in fields related to electron emission and high-temperature environments. Below are its common application scenarios: 1. Thermionic Vacuum Tubes: Due to its excellent thermionic emission properties, the barium tungsten electrode is frequently used as a hot cathode material in vacuum tubes (e.g., cathode ray tubes, CRTs). It can stably emit electrons at high temperatures, making it suitable for devices requiring high current density. 2. Gas…

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Role of Barium Tungsten Electrodes 10

Barium tungsten electrodes are a tungsten electrode material improved through the addition of barium elements. Their core value lies in significantly enhancing electron emission performance, leading to widespread applications across multiple critical domains. Below is a detailed analysis of their functions: I. Strengthened Core Characteristics 1. Low Work Function and High Emission Efficiency The incorporation of barium reduces the electrode’s work function to 1.6 eV (compared to 4.5 eV for pure tungsten), allowing electrons to escape more easily from the…

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Chemical Properties of Barium Tungsten Electrode 10

Barium tungsten electrode is a functional material that combines the electron emission characteristics of barium with the high-temperature stability of tungsten. Its chemical properties can be analyzed from the following aspects: 1. Composition and Structure The role of barium: As an alkaline earth metal, barium has a low work function, which significantly improves the electron emission ability of the electrode and is often used as a cathode material. Under high temperature or electric field, barium may exist on the surface…

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Physical Properties of Barium Tungsten Electrode 13

Barium tungsten electrode is a special electrode material widely used in electronic tubes, gas discharge lamps and other equipment. Its physical properties are the key to its performance and application. The following are the main physical properties of barium tungsten electrode: 1. Electron Emission Performance Barium tungsten electrode has excellent electron emission performance, especially under high temperature conditions, it can emit electrons stably. This makes it particularly suitable for use as a thermionic emission cathode that requires high current density.…

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Production Steps of Barium Tungsten Electrode 19

Barium tungsten electrode (BaO-W electrode) is a key electrode material used in gas discharge lamps (such as high-pressure sodium lamps and metal halide lamps). Its production steps are as follows: I. Raw Material Preparation 1. Tungsten Matrix: Select high-purity (≥99.95%) tungsten rods or tungsten wires and process them into the required shape (such as tip, cylinder) through forging, drawing and other processes. The surface needs to be polished or sandblasted to increase the specific surface area. 2. Barium Source: Barium…

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