ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Conductivity of melts in the system CaO-FeO-Fe₂O₃-SiO₂

V. Daněk, T. Ličko, and Z. Pánek

Institute of Inorganic Chemistry, Centre for Chemical Research, Slovak Academy of Sciences, CS-842 36 Bratislava

Abstract: Conductivity of the CaO—FeO—Fe₂0₃—Si0₂ melts in the temperature range 1530 К to 1920 К and in the atmosphere of air increases with the increasing temperature and with the increasing concentration of the iron oxides. The presence of iron in two oxidation states, Fe(II) and Fe(III), results in a partial electronic conductance which is due to the jumping electron. The dependence of logarithm of the conductivity value on the reciprocal tempera­ture was described by the third order polynomial. The dependence of conduc­tivity on the composition was described by the equation x=  ∑ z_iFu_i(c_i - c_i,o) From the above equation mobilities and diffusion coefficients for Ca²⁺, Fe²⁺, and Fe³⁺ cations and for electrons at 1723 К and 1823 К were calculated by the multiple linear regression. The concentration of the electrons in the melt is proportionate to 2x(Fe₂0₃) • x(FeO). Both mobility and diffusion coefficient of the present conductive particles increase in the order u (Fe^₃₊)<u(Fe²⁺)<u(Ca²⁺)<u(е^-)

Full paper in Portable Document Format: 402a215.pdf

Chemical Papers 40 (2) 215–223 (1986)