In order to avoid troubles for samplining, it is worthwhile to work out a simple method whereby the degree of mixing is measured immediately, non-destructively. The purpose of the present work is to develop a simple method which enables to measure the degree of mixing of binary systems having particles of different electric resistances.
In this report, the system composed of 13 spheres is treated with a particular emphasis on the edge effect (boundary effect). When the larger numbers of spheres with low electric resistances gather at the terminal position of the system, the apparent total electric resistance of the system will be increased. On the contrary, when the larger numbers of particles (spheres) with high electric resistances gather at the terminal position of the system, the apparent total electric resistance of the system will be decreased.
The amount of increase or decrease in apparent total electric resistance is proportional to the number of spheres located at the edge. An appropriate correction for the edge effect should be made, that is,
Correction factor for edge effect=(Total electric resistance of system (a) in Fig. 5)-(Total elec. res. of sys. (b) in Fig. 5)/(Number of spheres-B located at the edge of sys. (a) in Fig. 5)-(Number of spheres-B located at the edge of sys. (b) in Fig. 5)
