Loss Mechanism of Rare-Earth Tungsten Cathode Applied to High-Temperature Electrostatic Precipitation

Abstract:

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Rare-earth tungsten thermionic emission material was used in the high-temperature electrostatic dust removal technology. A static test facility was self-designed to explore the emission characteristic. XRD, SEM and EDS were used to analyze the microstructure and element distribution. Working in high-temperature and oxidizing condition, tungsten in the thermionic emission materials is oxidized to tungsten trioxide, but the rare-earth tungstate in the grain boundary has no chemical changes. In high-temperature and oxidizing ambience, there is oxidation and volatilization on the surface of rare-earth tungsten, resulting in materials loss. The degree of loss depends on the composition of gas.

Info:

Periodical:

Advanced Materials Research (Volumes 113-116)

Edited by:

Zhenyu Du and X.B Sun

Pages:

908-912

DOI:

10.4028/www.scientific.net/AMR.113-116.908

Citation:

J. J. Xu et al., "Loss Mechanism of Rare-Earth Tungsten Cathode Applied to High-Temperature Electrostatic Precipitation", Advanced Materials Research, Vols. 113-116, pp. 908-912, 2010

Online since:

June 2010

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Price:

$35.00

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