Factors Affecting the Life of Barium Tungsten Electrodes

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 characteristics of the electrode. Excessive current will cause the electrode to overheat, accelerate material loss, and thus shorten the service life.

3. Ambient Gas

The type and pressure of the ambient gas in which the electrode is located have a significant impact on its life. For example, oxidizing gases such as oxygen may react chemically with the electrode material, resulting in performance degradation and shortened life.

4. Purity of Electrode Materials

The higher the purity of the electrode material, the more stable its performance. The presence of impurities may cause unstable performance and accelerate the aging process of the electrode.

5. Electrode Structure

The geometry and structural design of the electrode will affect the heat dissipation performance and electron emission efficiency. Reasonable structural design can effectively improve the durability of the electrode and extend its life.

6. Working Mode

The working mode of the electrode (such as continuous operation or pulse operation) has different effects on the life. In pulse mode, the electrode may be subjected to greater heat load and mechanical stress, which will affect the life.

7. Surface Treatment

Through surface treatment methods such as oxidation or coating, the electron emission characteristics and heat resistance of the electrode can be improved, effectively extending its service life.

8. Power Supply Stability

Voltage fluctuations or unstable current of the power supply will cause unstable working state of the electrode and accelerate the aging process. A stable power supply is essential to extend the life.

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