| abstract |
An abrasive shaped article composed of at least 90% by weight, based on the weight of the abrasive shaped article, of silica and having a bulk density of 0.2 g/cm3 to 1.5 g/cm3, a BET specific surface area of 10 m2/g to 400 m2/g and an average particle diameter of 0.001 mum to 0.5 mum. An abrasive disc having fitted thereto at least one of the abrasive shaped article is advantageously used for polishing a material such as substrate. Preferably at least two kinds of abrasive shaped articles are fitted to the supporting auxiliary, at least one kind of which has a bulk density of 0.7 g/cm3 to 1.5 g/cm3 and at least one kind of which has a bulk density of at least 0.2 g/cm3 but smaller than 0.7 g/cm3. |