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LA1408 Lanthanum Hexaboride Ceramic Part, LaB6 Parts

Lanthanum Hexaboride Ceramic Part Properties

Catalog No. LA1408
Size Customized
Purity 98%, 99%, 99.9%
Molecular Formula LaB6
Crystal Structure Cubic

Boron-Nitride-sds

Download Lanthanum Hexaboride SDS 

 

Lanthanum Hexaboride Ceramic Part Description

Lanthanum Hexaboride Ceramic PartsLanthanum 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 cathode 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 Current 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

  CeB6 LaB6
Brightness (A/cm2-sr) 107 107
Short-term beam current stability % RMS <1> <1>
Typical service life (hr) 1,500+ 1000+
Operating vacuum (torr) 10-7 10-7
Work function (eV) ~2.65 ~2.70
Evaporation rate (g/cm2-sec) 1.6 x 10-9 2.2 x 10-9

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.

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