Patent ID: 9387459
Filing Date: 2016-07-12
CPC Classification: B01J,C01F,C04B

Claim Text:
1. A substrate material comprising alpha-Al 2 O 3 , wherein the alpha-Al 2 O 3 comprises from 30-90% by weight based on the sum of all inorganic components of a first alpha-Al 2 O 3 component having a primary crystal grain size of 1 to 3 μm and an agglomerate size of 3 to 5 μm, from 10 to 70% by weight based on the sum of all inorganic components of a second alpha-Al 2 O 3 component having a primary crystal grain size of 0.3 to 1 μm and an agglomerate size of 0.5 to 1 μm, wherein the substrate material is porous and wherein the alpha-Al 2 O 3 has a mechanically stable, component-penetrating framework structure comprising the alpha-Al 2 O 3 , wherein the pore diameter distribution curve thereof measured by mercury intrusion porosimetry has a relative maximum between 0.3 and 1.3 μm and another relative maximum between 3 and 6 μm.