Ceramic probe for measuring the thermal conductivity of an electrically conductive liquid by the transient hot wire method

A new ceramic probe has been developed for measuring the thermal conductivity of an electrically conductive liquid by using the transient hot wire method. A wire was fabricated on a 10-mm-thick alumina substrate using a co-firing technique. To avoid leakage of the current to the liquid, the metallized wire was insulated with a 60-μm-thick alumina layer. Also developed for this probe is a method of compensating for the measurement error caused by increases in the resistance of metallized electrodes. The thermal conductivity of mercury was measured with this probe at temperatures of 300–382 K.