Figure 4.
The horizontal axis gives temperature T from about 290 to 360 kelvin. The vertical axis gives current density J in amperes per square metre on a logarithmic scale. Conditions are 0.6 megapascals and 2 per cent relative humidity. Measurement series represent electric field strengths of 4, 6, 10, 16, and 18 kilovolts per millimetre. Each series contains values near 293, 313, and 353 kelvin and increases with temperature. The 4 and 6 kilovolts per millimetre series remain below 10 to the power of negative 10 amperes per square metre. The 10 kilovolts per millimetre series rises from about 4 times 10 to the power of negative 11 to about 2 times 10 to the power of negative 10 amperes per square metre. The 16 and 18 kilovolts per millimetre series remain several orders of magnitude higher and increase from approximately 10 to the power of negative 8 towards several times 10 to the power of negative 8 amperes per square metre.Comparison of the measurement data of the current density in SF6 from Zavattoni, (2014) with the electrical conductivity model (12) multiplied with (see values in the figure) to obtain the resulting current density with respect to the temperature T
Source: Authors’ own work