CE1859 Cerium Hexaboride Sheet, CeB6 Sheet

Cerium Hexaboride Sheet Properties

Catalog No.	CE1859
Size	Min. thick. 0.1’’ or Customized
Density	4.80-4.87 g/cm3
Appearance	Purple
Melting Point	2552°C

Cerium Hexaboride Sheet Description

Cerium Boride, also called Cerium Hexaboride or CeB6, is a refractory ceramic material. The principal use of cerium hexaboride is a coating of hot cathodes, or hot cathodes made of cerium hexaboride crystals. It usually operates at temperature of 1450 °C.

Cerium hexaboride, like lanthanum hexaboride, slowly evaporates during the cathode operation. In conditions where CeB₆ cathodes are operated under 1850 K, CeB₆ should maintain its optimum shape longer and therefore last longer. While the process is about 30% slower than with lanthanum boride, the cerium boride deposits are reported to be more difficult to remove.

Cerium Hexaboride Sheet 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
-Radio therapy devices

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	uΩ-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 Cerium Hexaboride Sheet is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.