公开(公告)号：WO2019115476A1

公开(公告)日：2019-06-20

申请号：PCT/EP2018/084234

申请日：2018-12-10

Applicant: IMERTECH SAS

Inventor： SAHIN, Ertan

IPC: C09K3/14 ,  B24D3/14 ,  C04B18/02 ,  C04B28/24 ,  C04B35/111

Abstract: The present invention relates to an agglomerate abrasive grain made up of a plurality of individual abrasive grains which are bonded into an inorganic or organic binder matrix, wherein, based on the total weight of the agglomerate abrasive grain, at least 8% by weight of the abrasive grains which are bonded into the matrix are fused alumina-based polycrystalline alumina abrasive grains with a percentage of more than 97% by weight of alpha-alumina, and wherein the polycrystalline alumina abrasive grains, in turn, are made up of a plurality of AI 2 O 3 primary crystals with a crystal size of between 20 μm and 100 μm. The agglomerate abrasive grain has a closed macroporosity with a pore volume of between 5% by volume and 30% by volume, wherein the average pore diameter of the closed macropores is between 10 μm and 100 μm and their maximum pore diameter is in the range of approx. 120 μm.

公开(公告)号：EP3724294A1

公开(公告)日：2020-10-21

申请号：EP18829235.3

申请日：2018-12-10

Applicant: ImerTech SAS

Inventor： SAHIN, Ertan

IPC: C09K3/14 ,  B24D3/14 ,  C04B18/02 ,  C04B28/24 ,  C04B35/111