PURPOSE: To obtain remarkably excellent wear resistance by making a material of a pin of a disk with pins of sialon or silicon nitride. ;CONSTITUTION: The agitation disk 1 used in a wet type disperser in which the particles are pulverized by a wet type and dispersed, uses the disk 1b with pins 1a. At that time, since wear of the pin 1a of the disk 1b with pins 1a is severe, the material of the pin 1a is made of sialon or silicon nitride. Thus, since remarkably excellent wear resistance is obtained, the agitation disk of the wet disperser is improved.;COPYRIGHT: (C)1994,JPO&Japio
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