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arrow13LaB6 Filaments / Cathodes – Denka

PDF download available aStandard Denka Model 3 LaB6 Cathodes

Lanthanum Hexaboride is the optimum cathode material for use in:

  • SEM
  • TEM
  • X-Ray Microanalysis
  • Electron Beam Lithography

Features:

  • Low potential barrier (work function)
  • High melting point and stability at high temperatures
  • Low vapor pressure – reduces evaporation lost
  • Chemical stability
  • High brightness: LaB6 beam is ten times brighter than tungsten, has superior resolution – wide range of acceleration voltages. It provides sharp and clear pictures even to the smallest details. The initial brightness of a Denka Model 3 cathode (1 x 106 A/cm2.Str) is substantially better than that of competing mini-vogel type cathodes (typically 5x105 A/cm2.Str)
  • Long life: Heat and vacuum are the final determinants of any cathode tip’s life, but at 1550°C and a vacuum of 10-7 Torr, a service life of about 500 hours can be achieved.
  • Stability: Every Denka Model 3 cathode offers a stability of better than 3% per hour at 1550°C
  • Interchangeability: Denka Model3 LaB6 cathodes are designed as direct replacement for tungsten filaments.

Standard (Round) Tips

Provided with a 90° cone and 15µ radius round tip.

Flat (Truncated) Tips

Flat tips are recommended for applications where stability and long lifetime are the prime considerations, and where some degree of brightness can be sacrificed. Flat tips are available in eight configurations:

90° Cone Angle 60° Cone Angle
20µ radius 20µ radius
40µ radius 40µ radius
60µ radius 60µ radius
100µ radius 100µ radius

Sharp Tips

Sharp tips are recommended for applications where initial brightness is the foremost consideration and where shorter lifetime can be accepted. Sharp tips are available in two configurations.

60° Cone Angle
5µ radius
10µ radius
Flat Tip Standard (round) Tip Sharp Tip
Brightness About 5 times that of tungsten, 
2-5x105 A/cm2· Str
About 10 times that of tungsten, 
1x106 A/cm2· Str
Twice as bright as standard tips 
2x106 A/cm2· Str
Saturation Mono spot at about 1,400°C Mono spot at about 1,500°C. Almost the same as standard tips
Crossover Large (11-13µ) Small (7-10µ) Small (7-10µ)
Angular distribution Broad, 3.3-4.2x10-2 rad Sharp1.6 x10-2 rad Sharp1.6 x10-2 rad
Used Temperature Low temperature Low temperature High temperature.
Lifetime Long life; usable at low temperatures and crystallized end changes slowly.  Long life but shorter than flat tips. Short
Operation Easy; thanks to its large spot size and broad adjusting range.  Not so difficult. Difficult; Point adjustment needed!
Stability High; vulnerable to thermal expansion or vibration. High Middle;. Vulnerable to the thermal expansion or vibration. Adjustment is sometimes necessary.
Technology Needed Ordinary High Very high
Amray LaB6 Cathodes
AMRAY
Phillips
Philips Instrµments
Hitachi
Hitachi
JEOL LaB6 Cathodes
JEOL
isi sem
ISI SEMs
ISI TEM LaB6 Cathodes
ISI TEMs
Cambridge LaB6 Cathodes
Cambridge
Zeiss LaB6 Cathodes
Zeiss

Ordering:

All standard Denka M-3 LaB6 Cathodes are provided with a 90° cone angle and a 15µm radius round tip. These are just the standard Denka LaB6 Cathodes that are in stock.

80900 Denka M-3 LaB6 Standard for JEOL each 907.00 Add to Cart
80900-5 Denka M-3 LaB6 for JEOL 60-5 µm each 967.00 Add to Cart
80900-10 Denka M-3 LaB6 for JEOL 60-10 µm each 943.00 Add to Cart
80900-20 Denka M-3 LaB6 for JEOL 60-20 µm each 1,013.00 Add to Cart
80900-40 Denka M-3 LaB6 for JEOL 60-40 µm each 1,111.00 Add to Cart
80900-60 Denka M-3 LaB6 for JEOL 60-60 µm each 1,208.00 Add to Cart
80900-80 Denka M-3 LaB6 for JEOL 60-80 µm each 1,305.00 Add to Cart
80900-100 Denka M-3 LaB6 for JEOL 60-100 µm each 1,402.00 Add to Cart
80900-11 Denka M-3 LaB6 for JEOL 90-20 µm each 875.00 Add to Cart
80900-21 Denka M-3 LaB6 for JEOL 90-40 µm each 971.00 Add to Cart
80900-41 Denka M-3 LaB6 for JEOL 90-60 µm each 1,069.00 Add to Cart
80900-61 Denka M-3 LaB6 for JEOL 90-80 µm each 1,166.00 Add to Cart
80900-101 Denka M-3 LaB6 for JEOL 90-100 µm each 1,263.00 Add to Cart
80902 Denka M-3 LaB6 Standard for Philips each 950.00 Add to Cart
80904 Denka M-3 LaB6 Standard for AMRAY each 966.00 Add to Cart
80904-5 Denka M-3 LaB6 for KF sharp 60-5 µm each 966.00 Add to Cart
80904-10 Denka M-3 LaB6 for KF sharp 60-10 µm each 1,088.00 Add to Cart
80904-20 Denka M-3 LaB6 for KF flat 60-20 µm each 1,111.00 Add to Cart
80904-40 Denka M-3 LaB6 for KF flat 60-40 µm each 1,208.00 Add to Cart
80904-60 Denka M-3 LaB6 for KF flat 60-60 µm each 1,305.00 Add to Cart
80904-80 Denka M-3 LaB6 for KF flat 60-80 µm each 1,402.00 Add to Cart
80904-100 Denka M-3 LaB6 for KF flat 60-100 µm each 1,000.00 Add to Cart
80904-21 Denka M-3 LaB6 for KF flat 90-20 µm each 971.00 Add to Cart
80904-41 Denka M-3 LaB6 for KF flat 90-40 µm each 1,088.00 Add to Cart
80904-61 Denka M-3 LaB6 for KF flat 90-60 µm each 1,166.00 Add to Cart
80904-81 Denka M-3 LaB6 for KF flat 90-80 each 1,263.00 Add to Cart
80904-101 Denka M-3 LaB6 for KF flat 90-100 each 1,295.00 Add to Cart
80906 Denka M-3 LaB6 Standard for Cambridge each 814.00 Add to Cart
80906-5 Denka M-3 LaB6/Cambridge 60-5 µm each 967.00 Add to Cart
80906-10 Denka M-3 LaB6/Cambridge 60-10 µm each 945.00 Add to Cart
80906-20 Denka M-3 LaB6/Cambridge 60-20 µm each 1,013.00 Add to Cart
80906-40 Denka M-3 LaB6/Cambridge 60-40 µm each 1,111.00 Add to Cart
80906-60 Denka M-3 LaB6/Cambridge 60-60 µm each 1,208.00 Add to Cart
80906-80 Denka M-3 LaB6/Cambridge 60-80 µm each 1,305.00 Add to Cart
80906-100 Denka M-3 LaB6/Cambridge 60-100µm each 1,425.00 Add to Cart
80906-11 Denka M-3 LaB6/Cambridge 90-20 µm each 874.00 Add to Cart
80906-21 Denka M-3 LaB6/Cambridge 90-40 µm each 972.00 Add to Cart
80906-41 Denka M-3 LaB6/Cambridge 90-60 µm each 1,069.00 Add to Cart
80906-61 Denka M-3 LaB6/Cambridge 90-80 µm each 1,166.00 Add to Cart
80906-81 Denka M-3 LaB6/Cambridge 90-100 µm each 1,374.00 Add to Cart
80908 Denka M-3 LaB6 Standard for Hitachi 90-15 each 813.00 Add to Cart
80908-5 Denka M3-H2 LaB6 for Hitachi 60-5 µm each 975.00 Add to Cart
80908-10 Denka M3-H2 LaB6 for Hitachi 60-10 µm each 942.00 Add to Cart
80908-20 Denka M3-H2 LaB6 for Hitachi 60-20 µm each 1,013.00 Add to Cart
80908-40 Denka M3-H2 LaB6 for Hitachi 60-40 µm each 1,111.00 Add to Cart
80908-60 Denka M3-H2 LaB6 for Hitachi 60-60 µm each 1,208.00 Add to Cart
80908-80 Denka M3-H2 LaB6 for Hitachi 60-80 µm each 1,305.00 Add to Cart
80908-100 Denka M3-H2 LaB6 for Hitachi 60-100 µm each 1,374.00 Add to Cart
80908-11 Denka M3-H2 LaB6 for Hitachi 90-20 µm each 875.00 Add to Cart
80908-21 Denka M3-H2 LaB6 for Hitachi 90-40 µm each 971.00 Add to Cart
80908-41 Denka M3-H2 LaB6 for Hitachi 90-60 µm each 1,069.00 Add to Cart
80908-61 Denka M3-H2 LaB6 for Hitachi 90-80 µm each 1,200.00 Add to Cart
80908-81 Denka M3-H2 LaB6 for Hitachi 90-100 each 1,263.00 Add to Cart
80910 Denka M-3 LaB6 Standard for ISI SEM each 850.00 Add to Cart
80912 Denka M-3 LaB6 Standard for ISI TEM each 814.00 Add to Cart
80914 Denka LaB6, Carl Zeiss 90-15 Round each 814.00 Add to Cart
80914-20 Denka LaB6, Carl Zeiss 90-20 Flat each 950.00 Add to Cart

For all other LaB6 filaments in Flat Tip and Sharp tip just tell us what you require and we shall price it for you. The complete line of Denka Lab6 filaments is available through us.

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