Do you have any questions? Email Us [email protected]

LA1408 Lanthanum Hexaboride (LaB6) Ceramic Part

Lanthanum Hexaboride Ceramic Part Properties

Catalog No. CE1850
Density 4.8g/cm3
Melting Point 2552℃
Molecular Formula CeB6
Crystal Structure Cubic

 

Boron-Nitride-sds

Download Lanthanum Hexaboride SDS 

 

Lanthanum Hexaboride Ceramic Part Description

Lanthanum Hexaboride Ceramic Parts

Lanthanum Hexaboride, also called LaB6 cathode, is an inorganic chemical of rare earths. With melting point 2528 K, LaB6 cathode is a refractory ceramic material, which is insoluble in water or hydrochloric acid and very stable in vacuum.

The unique properties of lanthanum hexaboride crystals provide stable electron emitting media with work functions near 2.70 eV. The low work function yields higher currents at lower cathode temperatures than tungsten, which means greater brightness, or current at the beam focus, and longer LaB6 cathode life. Typically, LaB6 cathodes exhibit 10 times the brightness and 50 times the service life of tungsten cathodes. In electron microscope applications, these characteristics translate to more beam current in a smaller spot at the sample, improved resolution, and less frequent cathode replacement.

Lanthanum Hexaboride Ceramic Part Specification

Product

Lanthanum Hexaboride

Structure

Polycrystalline

Symbol

LaB6

Thermal Conductive

47 W/mK (20℃)

Cas No.

12008-21-8

Thermal Expansion  

6.2 10-6K-1 (20-900℃)

Atomic Mass

203.78 g/mol

Electrical Resistance 

ca.15 μΩ cm (20℃)

Density

4.72 g/cm3

Electrical Conductive

6.65×104  S/cm (20℃)

Melting Point

2528 K

Currenty Denstiy

150 A/cm2 (1950℃)

Hardness

87.5 RA

Electron Emissivity

2.6 eV

Flexure Strength (σ)

200 Mpa

Fracture toughness (Kic)

3.0 MN/m3/2

 

Lanthanum Hexaboride Chemical Composition

LaB6 (% min.)

99.9%

B(% min.)

31%

Rare Earth Impurities

Non-RE Impurities

Ce

<120ppm>

Fe

<250ppm>

Pr

<150ppm>

Si

<100ppm>

Nd

<180ppm>

Ca

<90ppm>

Sm

<112ppm>

C

<300ppm>

Y

<250ppm>

Mg

<100ppm>

 

 

Ti

<100ppm>

 

Lanthanum Hexaboride Ceramic Part Applications 

– Thermionic emission (cathode)
– Plasma source for plasma enhanced coating(PECVD)
– Vacuum electron beam welding machine
– Electron beam surface reforming device
– Electron beam lithography device
– Transmission electron microscope
– Scanning electron microscope
– Surface analysis device

Material Data for LaB6 and CeB6

Parameter
Units LaB6 CeB6
Stoichiometry
N/A
~6
Metal Impurities
ppm by wt.
<30>
Density
g/cm3
4.72
4.80
Coefficient of Thermal Expansion
α x 106
5.6
6.2
Electrical Resistivity
µΩ-cm
~50
~65
Effective Work Function (100) at 1800 K
eV
2.70
2.65
Spectral Emissivity at 0.65 microns
N/A
0.765
0.779
Evaporation rate at 1800 K (UHV)
g/cm2/s
2.2 x 10-9
1.6 x 10-9
Orientation limit for specific orientation
degrees
<2>
Pyrolitic block mount resistance @ 1800 K
Ohms
1.45

  

Packing Service

ACM’s Lanthanum Hexaboride Ceramic Part is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.

REQUEST A QUOTE












  I would like to join the mailing list to receive updates from Advanced Ceramic Materials .

Related Products

Submit your review
1
2
3
4
5
Submit
     
Cancel

Create your own review
Lanthanum Hexaboride (LaB6) Ceramic Part
Average rating:  
 0 reviews