The operating temperature range of barium tungsten cathodes can vary depending on the application, but generally perform better at lower operating temperatures. Generally speaking, it is more common for barium tungsten cathodes to work in the range from room temperature to several hundred degrees Celsius. The specific operating temperature range may depend on the cathode design, application, and desired electron emission properties.
In electronic devices, such as X-ray tubes, microwave amplifiers, etc., barium tungsten cathodes usually work at relatively low temperatures to maintain stable electron emission performance. The high temperature environment may lead to instability of electron emission characteristics, thereby affecting device performance.
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