Figure 2: Variation of electrical and thermal conductivities around the phase transition point. | Nature Communications

Figure 2: Variation of electrical and thermal conductivities around the phase transition point.

From: Reversible temperature regulation of electrical and thermal conductivity using liquid–solid phase transitions

Figure 2

(a) Electrical conductivity of graphite suspensions as a function of volume fraction in the liquid state. The inset shows a logarithmic plot of σc versus (ϕ−ϕc), which indicates a percolation threshold of ϕc=0.05%. (b) Electrical conductivity of graphite suspensions as a function of temperature. The inset shows the relationship between the contrast ratio of electrical conductivity and graphite volume fraction. (c) Thermal conductivity at different graphite volume fractions as a function of temperature. The inset plot indicates the relationship between the contrast ratio of thermal conductivity and graphite volume fraction. (d) Cyclic EC (electrical conductivity) versus temperature measurement results of a 0.8% graphite/hexadecane suspension. Blue and red squares indicate the conductivity variance through the processes of freezing and melting, respectively. (e) TC (thermal conductivity) contrast after different cycles. Blue lines indicate the thermal conductivity of 0.8% graphite/hexadecane suspensions at 3 °C during different thermal cycles, whereas red lines show the thermal conductivity at 25 °C during different thermal cycles.

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