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2002•The Chinese Journal of Nonferrous MetalsRequires access

Carbonization mechanism of Mo-La_2O_3 cathode

Zuo Tie-yong

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Abstract

The carbonizing process of Mo-La 2O 3 cathode are investigated and the microstructures and phases of it's carbonized layers are studied by TEM and XRD. The carbonizing temperature, carbonizing time and the pressure of benzene (C 6H 6) are the decisive factors. In the adequate benzene vapor (1.5×10 -2 Pa), Mo-La 2O 3 cathodes carbonized at 1 723 K and for 6 min can obtain maximum carbonized ratio and coarse Mo 2C particles carbonized layers, which is beneficial to the migration of activated rareearth element to the surface of the cathode during the operating. The carbonization mechanism of Mo-La 2O 3 cathode is also discussed.

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What this paper is about

The carbonizing process of Mo-La 2O 3 cathode are investigated and the microstructures and phases of it's carbonized layers are studied by TEM and XRD. The carbonizing temperature, carbonizing time and the pressure of benzene (C 6H 6) are the decisive factors. In the adequate benzene vapor (1.5×10 -2 Pa), Mo-La 2O 3 cathodes carbonized at 1 723 K and for 6 min can obtain maximum carbonized ratio and coarse Mo 2C particles carbonized layers, which is beneficial to the migration of activated rareearth element to the surface of the cathode during the operating. The carbonization mechanism of Mo-La 2O 3 cathode is also discussed.

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Available abstract

The carbonizing process of Mo-La 2O 3 cathode are investigated and the microstructures and phases of it's carbonized layers are studied by TEM and XRD. The carbonizing temperature, carbonizing time and the pressure of benzene (C 6H 6) are the decisive factors. In the adequate benzene vapor (1.5×10 -2 Pa), Mo-La 2O 3 cathodes carbonized at 1 723 K and for 6 min can obtain maximum carbonized ratio and coarse Mo 2C particles carbonized layers, which is beneficial to the migration of activated rareearth element to the surface of the cathode during the operating. The carbonization mechanism of Mo-La 2O 3 cathode is also discussed.

Key concepts: Carbonization, Cathode, Materials science, Microstructure, Benzene, Chemical engineering, Composite material, Organic chemistry

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