抄録
A new device for measuring the size distribution of fine powders has been developed based on the principle of the balancing machine reported previously by one of the authors. The new balancing machine has two cells which are set symmetrically to the rotor axis. One of them is filled with powder suspension, while the other contains only the suspension medium having the same weight as that of the suspension in another cell.
The balancing machine detects the movement of the center of mass caused by the centrifugal sedimentation of the particles. The particle size distribution is determined from this movement of the center of mass by using the computer analysis.
The size distributions of various powders were measured with this new device and the results were compared with those measured by other methods. It should be noted that the size distribution of the powders having a wide range of the particle size can be measured with this device by changing the speed of rotation during one measuring procedure.
