Precision Cathodes for Electron Optics

Enhancing Stability and Brightness in Electron Microscopy

In the world of high-resolution imaging, the stability of the electron source is the foundation of data accuracy. A reliable LaB6 cathode provides higher brightness and longer service life compared to standard tungsten filaments. Telite Ceramics uses vacuum hot-pressing technology to produce a dense Lanthanum Hexaboride emitter, helping maintain a stable electron beam during long-term operation in analytical instruments.

1. Hot-Pressed Material Purity & Stability

The core of a thermionic emission source lies in its material structure. Our thermionic emission material is hot-pressed to reduce internal porosity and support cleaner vacuum use. As a SEM electron gun source, this material helps provide the low work function required for higher current density and reduced beam drift. In practical use, a LaB6 thermionic cathode is usually selected where source stability and brightness are both important.

2. Precision Tip Machining for LaB6 cathode

Achieving the required beam profile depends on tip geometry. Telite Ceramics supports machining of conical, flat-top, and other custom forms for a LaB6 cathode, TEM LaB6 filament, or related electron source part. Our process is focused on tip shape control, surface finish, and dimensional consistency so that the Lanthanum Hexaboride emitter can better match mounting and beam requirements in SEM and TEM systems.

3. Multi-Platform Compatibility and Support

Our emission sources are used in SEM, TEM, EPMA, and other electron beam systems. By choosing a LaB6 thermionic cathode from Telite, customers can order according to real equipment structure and drawing requirements. For a custom SEM electron gun source or TEM LaB6 filament, it is usually helpful to confirm base dimensions, mounting style, tip geometry, and intended instrument model in advance.