Applied Physics Technologies, Inc. specializes in thermionic and field emission cathodes. APTech is a specialty producer and supplier of CeBix® cathodes (cerium hexaboride), LaB6 cathodes (lanthanum hexaboride), HfC cathodes (hafnium carbide), CFE and ESE sources. Our cathodes have been used in many different applications: microscopy, microanalysis, additive manufacturing, and other industries that use electron sources in their products and work.

Global Cathode Producer


APTech partners with many end-users, OEMs and government research agencies in various projects involving thermal emission, cold field emission, and refractory metals.

R&D Partnerships

Check out our new cathode page that displays all our products and navigates you through the process of selecting a cathode.


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