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LaB6 Cathodes
The rare earth hexaboride compounds exhibit an excellent combination of low work function and low volatility. In fact, lanthanum hexaboride (LaB6) is in wide-spread everyday use in a variety of fine-focused electron beam instruments. LaB6 cathodes are ideal for many small spot size applications such as SEM, TEM, sterilization, surface analysis and metrology, and for high current applications such as lithography, x-ray sources, and even electron-beam welders.
The work function of LaB6 is very dependent upon the purity and the exact composition of this binary material. Our floating zone refining technique has been perfected over the years to produce some of the purest material available. This coupled with our stringent and exacting composition requirements produces both the purest and the lowest work function LaB6 available anywhere in the world.
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