| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a polishingα-alumina composition useful as a polishing material having an excellent polishing rate, not leaving a polishing defect, and giving a good finish after the polishing, and to provide a method for producing the same. <P>SOLUTION: This polishingα-alumina composition is characterized in thatα-alumina used for a polishing composition in which theα-alumina is dispersed in water or an organic solvent as polishing particles has anα-crystal particle diameter of≤1μm, an oil absorption of≥50 mL/100 g, a 50% average particle diameter of 2 to 8μm, and a 90% particle diameter of≤20μm. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
