LA1406 Lanthanum Hexaboride (LaB6) Cathode

Catalog No.	LA1406
Size	Customized
Material	LaB6
Purity	98%, 99%, 99.9%
Shape	Cathode
MSDS/SDS	Download MSDS/SDS

Lanthanum Hexaboride Cathode (LaB6 cathode) is an inorganic chemical. As a leading global supplier of advanced ceramics, Stanford Advanced Materials (SAM) provides consistently high-quality Lanthanum Hexaboride Cathode (LaB6 ceramic). We're capable of supplying custom materials per any specs/drawings you provide us with.

Other shapes of LaB6 cathode product: Lanthanum Boride Sputter Target, Lanthanum Hexaboride (LaB6) Disc

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Description

Specification

Technical Data Sheet

Lanthanum Hexaboride Cathode Description

Lanthanum Hexaboride Cathode(LaB6 cathode, also called lanthanum boride cathode and LaB6 cathode) is an inorganic chemical. With a melting point of 2528 K, LaB6 cathode is a refractory ceramic material, which is insoluble in water or hydrochloric acid and very stable in a vacuum. LaB6 cathode Stoichiometric samples are colored intensely purple-violet, while boron-rich ones (above LaB6.07) are blue. Ion bombardment changes its color from purple to emerald green. LaB6 cathode is a superconductor with a relatively low transition temperature of 0.45 K.

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 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.

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Lanthanum Hexaboride Cathode 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	6.65x10⁴S/cm (20℃)
Melting Point	2528 K	Currency Density	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

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 Cathode 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
* Radiotherapy devices

Lanthanum Hexaboride Cathode Packing

SAMs’ LaB6 cathode is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.