Chem. J. Chinese Universities

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Preparation and Properties of Cermets Inert Anode with Adding MnO2

ZHANG Li-Peng1,2, YU Xian-Jin2*, DONG Yun-Hui2, LI De-Gang2   

    1. School of Material Science and Metallurgical Engineering, Northeast University, Shenyang 110004, China;
    2. School of Chemical Engineering, Shandong University of Technology, Zibo 255049, China
  • Received:2007-02-24 Revised:1900-01-01 Online:2008-01-10 Published:2008-01-10
  • Contact: YU Xian-Jin

Abstract: Cermets with adding MnO2, used as the inert anode in aluminum electrolysis, were prepared. The effects of MnO2 on the properties of inert anode were researched. The inert anode on corrosion resistance properties were also studied, and determination of the conductivity of the sample in the temperature change range of 500—1000 ℃ was made. The effects of MnO2 on sintering properties of inert anode were investigated. The results indicate that MnO2 improved sintering properties, crystal of cermets with adding MnO2 grew ideally, the cermets inter anode had a high density, high anti-oxidation, corrosion resistance and high conductivity. The annual corrosion rate of cermets with adding MnO2 was 12.32 mm/a. The electric conductivity was stable and good, which belongs to the electric conductivity property of the semiconductor. The conductivity increased with temperature increasing. The conductivities of cermets with adding MnO2 was 67 S/cm at 850 ℃.

Key words: MnO2, Metal cermet, Doping, Inert anode

CLC Number: 

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