What is the sodium content of low sodium tabular alumina?

Is it necessary to use Australian alumina powder in the production of tabular alumina

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