Global Cathode Producer

      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.


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

View Cathodes

R&D Partnerships

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