Core Advantages of Barium Tungsten Electrodes

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 tungsten electrodes increase the brightness by 15%, and can be started at a voltage lower than 10% of the mains voltage.

2. Fast start-up and high-frequency response

The electron emission response speed is extremely fast, supporting a repetition frequency of 1-40 times/second, suitable for high-frequency equipment such as strobe lights and lasers.

II. Excellent Chemical Stability and Life

1. Anti-poisoning and environmental resistance

The tungsten sponge structure protects the active substance and can be repeatedly exposed to the atmosphere for 5-6 times and still remain stable, suitable for complex working conditions.

The life of the reserve cathode exceeds 5 million times (high-frequency flash), which is much higher than that of ordinary electrodes.

2. High temperature resistance and low loss

The operating temperature is 100-150℃ lower than similar cathodes, reducing heat loss and extending equipment life.

III. Wide Range of Application Scenarios

1. Lighting field

HID lamp: the first choice for road/industrial lighting, providing stable and high-brightness light source.

Strobe lamp/xenon lamp: excellent performance in stage and film and television equipment, supporting ultra-long life and instantaneous high brightness.

2. Electrovacuum and laser technology

Electrovacuum devices: such as microwave tube cathodes, with a current density of 30 A/cm² (at 1100℃) and a life of more than 18,408 hours.

Laser mercury: improve laser stability and efficiency.

3. Special application scenarios

Medical beauty (skin rejuvenation lamp), solar energy detection, industrial counters and other fields that require high-reliability light sources.

IV. Cost-Effectiveness Advantage

1. Long-term cost advantage

Although the preparation process is complicated (such as the impregnation method requires tungsten sponge and aluminate sintering), the long life reduces the replacement frequency. For example, the microwave tube cathode design saves more than 2 million yuan.

2. Convenient maintenance

Surface oxidation can be restored through hydrogen burning treatment to reduce the scrap rate.

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