Process for producing zirconia yttria grinding media used for grinding magnetic coating powder

摘要

This invention discloses zirconia-containing grinding media in the preparation of magnetic disc coating and method for producing such grinding media. The grinding media essentially consists of zirconia-sintered body containing 3.6% to 8.0% by weight of yttrium oxide, the zirconia sintered body having a means grain size of less than 2 mu m and the relative theoretical density of more than 98.0%.