| 摘要 |
PROBLEM TO BE SOLVED: To provide: a method for polishing the surface of a sapphire in high quality at a high polishing speed; composite abrasive grains used for polishing; and a polishing device.SOLUTION: Abrasive grains for wet-polishing a sapphire are composite abrasive grains obtained by directly bonding a mixture of a first particulate abrasive 12 having a Mohs hardness of 7 or more and 9 or less, a second particulate abrasive 13 having mechanochemical action to the sapphire and a particulate frictional heat reactive agent 14 insoluble to pure water used for slurry and consisting of alkaline metal salt or alkaline earth metal salt by a mechanical alloy method and integrating the resultant mixture in a particulate shape. |
