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Home / Accessories for Microscopy / Filaments / Denka M-3 LaB6 Cathodes

Denka M-3 LaB6 Cathodes

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Denka M-3 LaB6 Cathodes

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Advantages

The use of an electron beam enables not only observation of the submicron world (TEM’s SEM’s and X-ray microanalysers) but also processing with submicron precision (electron beam lithography systems).
The optimum cathode material for use in these instruments would possess the following properties:

  • Low potential barrier (work function)
  • High melting point and stability at high temperatures
  • Low vapor pressure so as to reduce evaporation loss
  • Chemical stability

The relative drawbacks of tungsten cathodes are a work function of 4.7eV, insufficient beam current, and a short service life.

LaB6 has a work function of 2.66eV – thus more easily emitting electrons – and is a relatively stable material, so it has been increasingly used as a material for cathodes instead of tungsten.

Using LaB6 cathodes with TEM’s and SEM’s, even with the electron beam narrowed down, it is possible to obtain enough beam current to achieve better resolution and clear micrographs with less noise.
The principle advantage, however, is that LaB6 can be used in a stable condition for a much longer time.

Denka manufactures the purest, highest quality LaB6 crystals for use in their cathode tips.


Applications are:

  • SEM
  • TEM
  • X-ray Beam Analysis (EPMA)
  • Electron Beam Lithography


Benefits:

High Brightness:
A LaB6 beam is 10 times brighter than tungsten, has superior resolution, and features a wide range of acceleration voltages. It provides sharp, clear pictures, down to the smallest detail.
The initial brightness of a Denka Model 3 cathode (1 x 106A/cm2.Str) is substantially better than that of competing, mini-vogel type cathodes (typically 5 x 105A/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 expected.

Stability:
Thanks to its simple and durable construction, every Denka Model 3 LaB6 Cathode offers a stability of better than 3% per hour at 1550°C.

Interchangeability:
Denka Model 3 LaB6 cathodes are designed as direct replacements for tungsten filaments when a vacuum in the 10-7 range is provided.

Comparison of Tip Configurations
Comparison of Tip Configurations Available with Denka M-3 LaB6 AEI style Cathodes
Flat Tip Standard (Round) Tip Sharp Tip
90° or 60° cone angle 20/40/60/100µm flat tip radius 90° cone angle 15µm tip radius 60° cone angle 5µm and 10µm tip radius
Brightness About 5 times that of tungsten 2-5 x 105 A/cm2 • Str About 10 times that of Tungsten 1 x 106 A/cm2 • Str Twice as bright as standard tips 2 x 106 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 (11-13µm) Small (7-10µm) Small (7-10µm)
Angular Distribution Broad 3.3-4.2 x 10-2rad Sharp 1.6 x 10-2rad Sharp 1.6 x 10-2rad
Used Temperature Low Temperature High Temperature High Temperature
Lifetime Long life (usable at low temperatures, and crystallized end changes slowly) Long life; shorter than flat tips Short
Operation Easy (thanks to its large spot size and broad adjusting range) Not so difficult Difficult (the point adjustment needed)
Stability High (invulnerable to thermal expansion or vibration) High Middle (vulnerable to thermal expansion or vibration, adjustment is sometimes necessary)
Technology Needed Ordinary High Very High
Dimensions for EM Filament Bases

Dimensions for EM Filament Bases (for Tungsten/Lab6) Filaments

Base Type Diameter of Ceramic disc in mm Diameter of Pins in mm Center Distance of Pins in mm
AEI 12.0 1.0 6.45
FEI/PHILIPS 26.0 1.0 5.0
JEOL K-type 28.0 1.2 8.0
HITACHI S-type 9.8 1.2 2.7
ZEISS (DSM & TEM) LEO (1450 & TEM) TESCAN 19.8 1.0 5.0
AMRAY (except 1200) 26.1 1.0 5.0
ISI/ABT/TOPCON 2 pins 23.3 1.2 11.9
ISI/ABT/TOPCON 23.4 1.2 12.0
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Description
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Product

Denka M-3 LaB6 Cathode for JEOL Instruments
90-15, standard tip
no. 1450

Description

Standard Denka M-3 LaB6 Cathodes

Provided with a 90 cone angle and 15 m radius round tip.

Denka jeol electron microscope Denka M-3 LaB6 Cathode for JEOL Instruments
(compatible with K-type filament base)

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Art.Description Unit PriceQuantity
1450

Denka M-3 LaB6, Filament, LKS/90-15, standard tip

Each € 1.555,60
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Brand: Ted Pella

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Product

Denka M-3 LaB6 Cathode for FEI, Philips Instruments (Except XL-30)
90-15, standard tip
no. 1451

Description

Standard Denka M-3 LaB6 Cathodes

Provided with a 90 cone angle and 15 m radius round tip.

Denka M-3 LaB6 Cathode for FEI, Philips Instruments (Except XL-30)

Order

Art.Description Unit PriceQuantity
1451

Denka M-3 LaB6, Filament, PH2/90-15, standard tip

Each € 1.506,40
✓
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Brand: Ted Pella

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Description
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Product

Denka M-3 LaB6 Cathode for AMRAY Instruments
90-15, standard tip
no. 1452

Description

Standard Denka M-3 LaB6 Cathodes

Provided with a 90 cone angle and 15 m radius round tip.

Denka M-3 LaB6 Cathode for AMRAY Instruments
(except 1200 Series)

Order

Art.Description Unit PriceQuantity
1452

Denka M-3 LaB6 Filament, AM/90-15, standard tip

Each € 1.506,40
✓
spinner
Brand: Ted Pella

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Description
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Product

Denka M-3 LaB6 Cathode AEI base for Cambridge (except S2A and S4-10), Camscan, Electroscan, Leica, LEO and Zeiss (EVO) Instruments
90-15, standard tip
no. 1453

Description

Standard Denka M-3 LaB6 Cathodes

Provided with a 90 cone angle and 15 m radius round tip.

Denka M-3 LaB6 Cathode AEI base for Cambridge (except S2A and S4-10), Camscan, Electroscan, Leica, LEO and Zeiss (EVO) Instruments

Order

Art.Description Unit PriceQuantity
1453

Denka M-3 LaB6 Filament, CA/90-15, standard tip

Each € 1.467,00
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Brand: Ted Pella

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Description
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Product

Denka M-3 LaB6 Cathode for Hitachi Instruments
90-15, standard tip
no. 1454

Description

Standard Denka M-3 LaB6 Cathodes

Provided with a 90 cone angle and 15 m radius round tip.

Denka M-3 LaB6 Cathode for Hitachi Instruments

Order

Art.Description Unit PriceQuantity
1454

Denka M-3 LaB6 Filament, H2/90-15, standard tip

Each € 1.467,00
✓
spinner
Brand: Ted Pella

Product
Description
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Product

Denka M-3 LaB6 Cathode for ZEISS/LEO TEM, Zeiss DSM SEMs, or Tescan SEMs
90-15, standard tip
no. 1449

Description

Standard Denka M-3 LaB6 Cathodes

Provided with a 90 cone angle and 15 m radius round tip.

Denka M-3 LaB6 Cathode for ZEISS/LEO TEM, Zeiss DSM SEMs, or Tescan SEMs

Order

Art.Description Unit PriceQuantity
1449

Denka M-3 LaB6, Filament, Z2/90-15, standard tip

Each € 1.506,40
✓
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Brand: Ted Pella

Product
Description
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Product

Denka M-3 LaB6 Cathodes Sharp and Flat Tips, AMRAY (Except 1200 Series)
Cones: 60-5, 60-10, 60-20, 60-40, 60-60, 60-100, 90-20, 90-40, 90-60, and 90-100 - Sharp and Flat Tips
no. 1455 to 1464

Description

Denka M-3 LaB6 Cathodes Sharp and Flat Tips

AMRAY (Except 1200 Series)

Order

Art.Description Unit PriceQuantity
1455

Denka LaB6 Filament, AM/60-5, Sharp Tip

Each € 1.554,70
✓
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1456

Denka LaB6 Filament, AM/60-10, Sharp Tip

Each € 1.683,60
✓
spinner
1457

Denka LaB6 Filament, AM/60-20, Flat Tip

Each € 1.630,70
✓
spinner
1458

Denka LaB6 Filament, AM/60-40, Flat Tip

Each € 1.787,60
✓
spinner
1459

Denka LaB6 Filament, AM/60-60, Flat Tip

Each € 1.943,90
✓
spinner
1460

Denka LaB6 Filament, AM/60-100, Flat Tip

Each € 2.257,10
✓
spinner
1461

Denka LaB6 Filament, AM/90-20, Flat Tip

Each € 1.407,20
✓
spinner
1462

Denka LaB6 Filament, AM/90-40, Flat Tip

Each € 1.563,50
✓
spinner
1463

Denka LaB6 Filament, AM/90-60, Flat Tip

Each € 1.719,80
✓
spinner
1464

Denka LaB6 Filament, AM/90-100, Flat Tip

Each € 2.032,40
✓
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Brand: Ted Pella

Product
Description
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Product

AEI style base for Cambridge, Leica, LEO, Zeiss (EVO), CamScan
Cones: 60-5, 60-10, 60-20, 60-40, 60-60, 60-100, 90-20, 90-40, 90-60, and 90-100 - Sharp and Flat Tips
no. 1465 to 1474

Description

AEI style base for Cambridge, Leica, LEO, Zeiss (EVO), CamScan

Order

Art.Description Unit PriceQuantity
1465

Denka LaB6 Filament, CA/60-5, Sharp Tip

Each € 1.910,00
✓
spinner
1466

Denka LaB6 Filament, CA/60-10, Sharp Tip

Each € 1.516,50
✓
spinner
1467

Denka LaB6 Filament, CA/60-20, Flat Tip

Each € 1.630,70
✓
spinner
1468

Denka LaB6 Filament, CA/60-40, Flat Tip

Each € 1.787,60
✓
spinner
1469

Denka LaB6 Filament, CA/60-60, Flat Tip

Each € 1.943,90
✓
spinner
1470

Denka LaB6 Filament, CA/60-100, Flat Tip

Each € 2.257,10
✓
spinner
1471

Denka LaB6 Filament, CA/90-20, Flat Tip

Each € 1.407,20
✓
spinner
1472

Denka LaB6 Filament, CA/90-40, Flat Tip

Each € 1.563,50
✓
spinner
1473

Denka LaB6 Filament, CA/90-60, Flat Tip

Each € 1.890,40
✓
spinner
1474

Denka LaB6 Filament, CA/90-100, Flat Tip

Each € 2.032,40
✓
spinner
Brand: Ted Pella

Product
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Product

ZEISS/LEO, Tescan
90-20, Flat Tip
no. 1448

Order

Art.Description Unit PriceQuantity
1448

Denka LaB6 Filament, Z2/90-20, Flat Tip

Each € 1.516,30
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Brand: Ted Pella

Product
Description
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Product

Hitachi
Cones: 60-5, 60-10, 60-20, 60-40, 60-60, 60-100, 90-20, 90-40, 90-60, and 90-100 - Sharp and Flat Tips
no. 1475 to 1484

Description

Hitachi

Order

Art.Description Unit PriceQuantity
1475

Denka LaB6 Filament, H2/60-5, Sharp Tip

Each € 1.555,40
✓
spinner
1476

Denka LaB6 Filament, H2/60-10, Sharp Tip

Each € 1.516,00
✓
spinner
1477

Denka LaB6 Filament, H2/60-20, Flat Tip

Each € 1.630,70
✓
spinner
1478

Denka LaB6 Filament, H2/60-40, Flat Tip

Each € 1.787,60
✓
spinner
1479

Denka LaB6 Filament, H2/60-60, Flat Tip

Each € 1.943,90
✓
spinner
1480

Denka LaB6 Filament, H2/60-100, Flat Tip

Each € 2.257,10
✓
spinner
1481

Denka LaB6 Filament, H2/90-20, Flat Tip

Each € 1.407,20
✓
spinner
1482

Denka LaB6 Filament, H2/90-40, Flat Tip

Each € 1.563,50
✓
spinner
1483

Denka LaB6 Filament, H2/90-60, Flat Tip

Each € 1.719,80
✓
spinner
1484

Denka LaB6 Filament, H2/90-100, Flat Tip

Each € 2.019,10
✓
spinner
Brand: Ted Pella

Product
Description
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Product

ISI, ABT, Topcon
Cone: 90-20, 90-40, 60-40 - Flat Tip
no. 1492 to 1500

Description

ISI, ABT, Topcon

Order

Art.Description Unit PriceQuantity
1492

Denka LaB6 Filament, ISS/90-20, Flat Tip

Each € 1.283,00
✓
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1493

Denka LaB6 Filament, ISS/90-40, Flat Tip

Each € 1.283,00
✓
spinner
1500

Denka LaB6 Filament, ISS/60-40, Flat Tip

Each € 2.067,60
✓
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Brand: Ted Pella

Product
Description
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Product

JEOL (Compatible with K-type Filament Base)
Cone: 60-20, 60-40, 60-60, 60-100, 90-20, 90-40v, 90-60, 90-10 m and 60-5 m - Flat and sharp tip
no. 1507 to 1516

Description

JEOL (Compatible with K-type Filament Base)

Order

Art.Description Unit PriceQuantity
1507

Denka LaB6 Filament, LKS/60-20, Flat Tip

Each € 1.630,70
✓
spinner
1508

Denka LaB6 Filament, LKS/60-40, Flat Tip

Each € 2.556,40
✓
spinner
1509

Denka LaB6 Filament, LKS/60-60, Flat Tip

Each € 1.943,90
✓
spinner
1510

Denka LaB6 Filament, LKS/60-100, Flat Tip

Each € 2.257,10
✓
spinner
1511

Denka LaB6 Filament, LKS/90-20, Flat Tip

Each € 1.407,20
✓
spinner
1512

Denka LaB6 Filament, LKS/90-40v, Flat Tip

Each € 1.563,50
✓
spinner
1513

Denka LaB6 Filament, LKS/90-60, Flat Tip

Each € 1.719,80
✓
spinner
1514

Denka LaB6 Filament, LKS/90-100, Flat Tip

Each € 2.559,80
✓
spinner
1515

Denka LaB6 Filament, LKSH60, 10 m Sharp Tip, TEM only

Each € 1.634,30
✓
spinner
1516

Denka LaB6 Filament, LKSH60S, 5 m Sharp Tip, TEM only

Each € 1.722,90
✓
spinner
Brand: Ted Pella

Product
Description
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Product

FEI, Philips (Except XL-30)
ones: 60-5, 60-10, 60-20, 60-40, 60-60, 60-100, 90-20, 90-40, 90-60, and 90-100 - Sharp and Flat Tips
no. 1517 to 1526

Description

FEI, Philips (Except XL-30)

Order

Art.Description Unit PriceQuantity
1517

Denka LaB6 Filament, PH2/60-5, Sharp Tip

Each € 1.722,90
✓
spinner
1518

Denka LaB6 Filament, PH2/60-10, Sharp Tip

Each € 1.683,60
✓
spinner
1519

Denka LaB6 Filament, PH2/60-20, Flat Tip

Each € 1.630,70
✓
spinner
1520

Denka LaB6 Filament, PH2/60-40, Flat Tip

Each € 1.787,60
✓
spinner
1521

Denka LaB6 Filament, PH2/60-60, Flat Tip

Each € 1.943,90
✓
spinner
1522

Denka LaB6 Filament, PH2/60-100, Flat Tip

Each € 2.257,10
✓
spinner
1523

Denka LaB6 Filament, PH2/90-20, Flat Tip

Each € 1.595,00
✓
spinner
1524

Denka LaB6 Filament, PH2/90-40, Flat Tip

Each € 1.563,50
✓
spinner
1525

Denka LaB6 Filament, PH2/90-60, Flat Tip

Each € 1.890,40
✓
spinner
1526

Denka LaB6 Filament, PH2/90-100, Flat Tip

Each € 2.019,10
✓
spinner
Brand: Ted Pella

Contact

Van Loenen Instruments
Penningweg 69 E
1507 DE Zaandam

Tel :+31 75 614 90 40
E-mail  :info@loeneninstruments.com

BTW/VAT nr. :NL804 608 180 B01
KvK nr. :28038099

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