Denka LaB6 Cathodes
The Denka LaB6 Cathodes are widely considered the industry standard electron source for scanning electron microscopes (SEM) and transmission electron microscopes (TEM).
The Lab6 Cathodes uses a high-purity single crystal of lanthanum hexaboride (LaB6) to provide roughly 10 times the brightness and significantly longer operational life than traditional tungsten filaments.
Performance Specifications:
- Work Function: 2.66 eV (compared to 4.7 eV for tungsten), allowing for easier electron emission.
- Operating Vacuum: Requires a high vacuum of \(10^{-7}\) mbar or better to prevent crystal degradation.
- Operating Temperature: Recommended below 1550°C for maximum stability, though it can operate up to 1600°C.
- Emission Stability: Better than 3% per hour at the recommended operating temperature.
- Lifespan: Typically ranges from 500 to 2,000 hours, depending on vacuum quality and operating temperature.
The broad range of Denka LaB6 Cathodes are available at economic pricing.
Especially use for Scanning Electron Microscopes (SEM) and Transmitted Electron Microscpes (TEM)
