Does T60 T64 refer to tabular alumina?

Is the lower the porosity of tabular corundum, the better?

sintered corundum tabular alumina 0-0.2mm 0.2-0.5mm 0.5-1mm

sintered corundum tabular alumina 0-1mm 1-3mm 3-5mm

what’s property modified tabular alumina sinterd corundum

what’s microporous sintered corundum sintered tabular alumina