Abstract
The electrical conductivity of a slag consisting of a mixture with CaO-SiO2-CaF2 was measured by the four electrodes method, using several Pt crucibles of different volumes. In the case of a small crucible, the conductivity was observed to be frequency dependent; it increased with increasing frequency. In the case of a large crucible, the conductivity was almost independent of frequency in the range from 0.2 kHz to 10 kHz. The shift of phase angles existed between the current and the potential in the slag. It was shown that the slag acted not only as a resistance but also as a reactance. In the case of a small crucible, it seemed that the impedance of the slag was affected by the crucible wall and, hence, that the frequency dependence of the conductivity resulted.
