Comparison of the Electronic Conduction Mechanism in MnOx-CaO-SiO2 and FeOx-CaO-SiO2 Slag Systems

作者：Pomeroy Michael; Brown Glendon; Barati Mansoor; Coley Kenneth S^*

来源：High Temperature Materials and Processes, 2012, 31(3): 231-236.

DOI：10.1515/htmp-2012-0042

• Slags
• electronic conductivity
• transference number
• manganese

The electrical and electronic and ionic transference numbers were measured for slags in the system MnO-CaO-SiO2 using the stepped potential chronoamperometry method. Transference numbers were measured over a range of oxygen partial pressure to evaluate the effect of MnO-CaO-SiO2. The data were compared with previously measured data for the FeO-CaO-SiO2 system. Data were found to fit well, the Diffusion Assisted Hopping Model for electronic conduction previously develop in the authors%26apos; laboratory. The only adjustable parameter employed in fitting the data to this model, was, r*, the maximum spacing at which hopping can occur. A single value for this parameter was used for all manganese data. The value of r* obtained for the MnO-CaO-SiO2 system was slightly smaller than that for the FeO-CaO-SiO2 system which is in keeping with the relative magnitude of the third ionization energies for Fe and Mn.

• 出版日期2012-6