Denka LaB6 Cathodes
The Denka M-3 LaB6 filaments are the industry standard, high quality LaB6 cathodes. The standard cathode with the 15µm round tip has a 90° tip angle, which provides a high brightness source coupled with excellent stability. Special version with sharper 60° tip angle and smaller 5µm/10µm round tipst are available for TEMs. Denka uses the purest , high qulaity LaB6 crystals for the Denal LaB6 cathodes. The Denka LaB6 tip provides a 10x higher brightness as the standard tungsten source, resulting in better resolution with clear images and less noise. The lifetime of the LaB6 cathode is much longer than a tungsten source providing a stable source over a longer period. See electron source performance table for more details. The Denka LaB6 cathodes improve results when used for:- SEM for low voltage and long term mapping applications
- TEM imaging and analysis
- Electron probe micro analyzers (EPMA or Microprobe)
- E-beam lithography
Design and features of the Denka M-3 LaB6 EM cathodes
The Denka LaB6 EM cathode construction is similar to the tungsten cathodes. It uses the same base with tungsten wires attached to the contact pins. Instead of a full tungsten loop, the LaB6 crystal forms the tip with the tungsten wires cemented against the LaB6 crystal. In this design the LaB6 crystal is directly heated by the filament current through the tungsten wires and the LaB6 crystal. This unique construction has the a number of features and benefits:
- Interchangeability: Denka M-3 LaB6 cathodes are designed as direct replacement for tungsten filaments
- Suitable for SEM and TEM
- Direct heating design with tungsten wired cemented at the high purity LaB6 crystal
- High brightness; about 10x higher than tungsten filaments (even 20x for the sharpere tips)
- Stable sources; due to its durable and simple construction, the standard Denka M3 LaB6 comprises a stability of better than 3%/hour at 1550°C
- Long life; at 10-7mbar vacuum and 1550°C operating temperature, 500-2000 hours lifetime can be expected for the standard M3 LaB6 cathode
- Low vapour pressure; reduced evaporation loss
- High melting point and stability at operating temperatures
- Low work fubction of 2.66ev (compared to 4.7ev for tungsten)
Specifications of the Denka M-3 LaB6 EM cathodes
Please consult the following table for the correct type of LaB6 source for your SEM, TEM or Microprobe. The Denka LaB6 EM cathodes are available for FEI, Hitachi, JEOL, Amray, CamScan, Philips, Tescan, Zeiss, LEO, Leica, Cambridge Instruments and Leica electron microscopes..
Type | Stand tip | Sharp tip |
Tip shape | 90°cone angle with 15µm round tip | 60°cone angle with 5µm round tip 60°cone angle with 10µm round tip |
Brightness Value | 10x times than tungsten tip 1 x 106 A/cm2.Str | 2x times than standard tip 2 x 106 A/cm2.Str |
Saturation | Mono spot at around 1500°C | Mono spot at around 1500°C |
Crossover | Small; 7-10µm | Small; 7-10µm |
Angular distribution | Sharp; 1.6 x 10-2 rad | Sharp; 1.6 x 10-2 rad |
Lifetime | Approx. 500 - 2000 hrs | Shorter than standard tip |
Ease of operation | Moderate | Difficult due to spot adjustment |
Stability | High, better than 3%/hr | Lower, due to smaller spot |
Vacuum | 10-7 mbar or better | 10-7 mbar or better |
Work function | 2.66 ev | 2.66 ev |
Products
Showing all 9 results
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Denka M3 LaB6 cathode, AEI Base, 90 degrees/15µm round tip for Zeiss EVO, LEO, Leica, CamScan, Cambridge Instruments and Philips XL-30 SEMs
$1,164.29 Add to cart View Product -
Denka M3 LaB6 cathode, AmRay base, 90 degrees/15µm round tip for all AMR Leitz/AMR and AmRay SEMs, except AMR 1200 serie
$1,235.98 Add to cart View Product -
Denka M3 LaB6 cathode, FEI/Philips base, 90 degrees/15µm round tip for FEI TEM/SEM and Philips EM200 TEM & PSEM 500 and later (except XL-30)
$1,235.98 Add to cart View Product -
Denka M3 LaB6 cathode, Hitachi S-Type base, 90 degrees/15µm round tip for Hitachi S-, SU, H- and X-Series SEM and TEM
$1,164.29 Add to cart View Product -
Denka M3 LaB6 cathode, Tescan base, 90 degrees/15µm round tip for Tescan SEMs
$1,209.48 Add to cart View Product -
Denka M3 LaB6 cathode, Zeiss Base, 90degrees/15μm round tip for DSM series SEMs, TEMs, LEO TEMs and LEO 1450 SEM
$1,209.48 Add to cart View Product -
Sharp Denka M3-LKSH60 LaB6 cathode, JEOL K-type Base with metal ring, 60 degrees/10µm round tip for JEOL TEMs
$2,050.71 Add to cart View Product -
Sharp Denka M3-LKSH60S LaB6 cathode, JEOL K-type Base with metal ring, 60 degrees/5µm round tip for JEOL TEMs
$2,059.29 Add to cart View Product -
Standard Denka M3-LKS LaB6 cathode JEOL K-Type base with metal ring, 90 degrees/15µm round tip for SEMs
$1,350.04 Add to cart View Product