Cerium Hexaboride Cathode, CeB6 Cathode | China Special Ceramic Parts, Inc.

Cerium Hexaboride Cathode Properties

Compound Formula	CeB6
Molecular Weight	204.98
Appearance	Purple
Melting Point	2552°C
Density	4.80-4.87 g/cm3
Solubility in water	insoluble
Crystal structure	Cubic

Cerium Hexaboride Cathode 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

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

Cerium 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
-Radio therapy devices

Packing Service

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