Tungsten

Information
Application Fields of Barium Tungsten Electrodes 24

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…

Information
Application Scenarios of Barium Tungsten Electrodes 21

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…

Information
Role of Barium Tungsten Electrodes 8

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…

Information
Chemical Properties of Barium Tungsten Electrode 7

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…

Information
Physical Properties of Barium Tungsten Electrode 9

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.…

Information
Production Steps of Barium Tungsten Electrode 15

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…

Information
Manufacturing Process of Barium Tungsten Electrode 12

Barium tungsten electrode is a material widely used in electron tube cathodes, and is valued for its good emission performance and stability. The manufacturing process of barium tungsten electrode is mainly based on the impregnation method, which can effectively avoid the problems of barium volatilization and uneven distribution that may be caused by direct mixed sintering. It is a relatively mature and commonly used process. The preparation of barium tungsten electrode usually includes the following main steps: 1. Preparation of…

Information
Preparation of Barium Tungsten Electrode by Impregnation Method 8

The preparation of barium tungsten electrode by impregnation is a process commonly used in electron emission materials (such as hot cathodes). By impregnating active barium compounds into porous tungsten substrates, composite electrodes with high-efficiency electron emission performance are formed. The following is a detailed preparation process and key points: 1. Preparation of Porous Tungsten Substrate Method: Powder metallurgy technology is used. Raw materials: High-purity tungsten powder (particle size is selected according to pore requirements). Molding: Form a porous preform by…

Information
Preparation Process of Barium Tungsten Electrode 8

The key preparation processes of barium tungsten electrode include porous tungsten matrix, barium impregnation reduction, etc. The following is its main process flow: I. Preparation of Porous Tungsten Matrix 1. Raw material selection: high-purity tungsten powder (more than 99.95%), the particle size is usually 1-5 μm. 2. Molding and pre-sintering: Molding or cold isostatic pressing, pressure 100-300 MPa, to form a porous green body. Pre-sintering (800-1200℃) in hydrogen or vacuum environment, initially remove impurities and enhance the strength of the…

Information
Core Advantages of Barium Tungsten Electrodes 8

As a high-performance electrode material, the core advantages of barium tungsten electrode are reflected in the following four aspects: I. Excellent Electron Emission Performance 1. Low work function and high current density The work function is only 1.6 eV (much lower than 4.5 eV of pure tungsten), and electrons are easier to leave the surface, achieving low-temperature and efficient emission. The current density is above 10 A/cm2, which significantly improves the energy output efficiency. For example, in HID lamps, barium…

1 … 5 6 7 8 9 … 331