CeB6 filament

The properties of hexaboride crystals provide a stable medium for electron beam emission. Compared with tungsten, it has lower work function and can generate higher current at lower cathode temperature. Generally, such cathodes are 10 times brighter and more than 10 times longer than tungsten cathodes. In the application of SEM, these properties translate into more beam flow at a smaller point of the sample, improving resolution and reducing the frequency of cathode replacement. CEB6 emitters at low beam energy (< It can also maintain good resolution at 5kV, which makes it more suitable for imaging samples requiring low acceleration voltage, such as biological samples.