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Prices are current as of Thursday, 26/11/2020.
Prices shown are in AUD and GST exclusive. Tax is added at checkout.

AU $1,499.00
Availability: Backorder

Please choose carefully. Returns of this item are subject to approval.

Product Code: M68F-9015

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Lanthanum hexaboride (LaB6) is one of the best thermionic emission materials, because of its low work function and high melting point. DENKA LaB6 Cathode has been highly reputed as an electron source for electron microscopes and electron beam lithograph apparatus.

Single crystal of high purity and quality, grown by floating zone technique, provides stable emission characteristics. Sophisticated machining covers various cone angles and dimensions. It is the only DENKA that can provide the hemispherical shape tip.


  • Low potential barrier (work function)
  • High melting point and stability at high temperatures
  • Low vapour 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 deg. 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 deg. C
  • Interchangeability: Denka Model3 LaB6 cathodes are designed as direct replacement for tungsten filaments.


Operating temperature ≤ 1600 deg. C however operation ≤ 1550 deg. C strongly recommended
Operating pressure ≤ 2.7x10-4Pa (2x10-6Torr) however operation ≤ 2.7x10-5Pa (2x10-7Torr) strongly recommended
Heating electrical power Power consumption ≤ 8.0W at 1550 deg. C
Typical life 500hr (depending on operating condition and circumstance)
LaB6 tip shape 90 deg. 15MicrometreR (standard type), 90 deg. 20Micrometreφ (long lifetime)

The cathodes that are marked in stock can be dispatched immediately and are normally received within 1-2 day/s of ordering (please advise at the time of ordering that you require expedited shipping). If out of stock, cathodes may take 4-5 weeks to be delivered.

Please note that one base type suits LEO/ Zeiss/ CAMSCAN/ Cameca and TESCAN


Orders with items in stock are packed within 24 hours. We ship with our best choice of courier, depending on goods ordered and shipping address provided.


Standard delivery

Express delivery


Next day



2-3 business days



4-10 business days

2-3 business days


6-14 business days

2-3 business days



5-14 business days

*Note: Delivery times are as provided by our carriers and are estimates only. Delays may occur during peak periods, and due to factors outside the carriers' control.

Standard shipping is $15 in Australia (free on orders over $200). Add $5 to ship Express (under 2kg only)


Order online and collect from our warehouse in Townsville.


Freight Charge

Ready for collection

11 Carlton Street, Kirwan


Once invoice has been emailed
(Less than 1 business day)

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