Electrical conductance, density, and the liquidus temperature of the KCl–PbCl 2 equimolar mixture with lead oxide additives

The influence of the PbO additive (up to 8.1 mol %) on the physicochemical properties of the KCl–PbCl 2 molten system is investigated. The primary crystallization temperatures of selected electrolyte compositions are determined. The temperature and PbO-content dependences of the conductance of electrolytes in cells with parallel electrodes are found by the impedance measurement method. The temperature dependence of density of the KCl–PbCl 2 equimolar melt containing up to 8.1 mol % lead oxide is measured by the Archimedean method, and the molar volumes are calculated. It is shown that the concentration dependence of the molar volume has an extreme form.