Alumina powder, alumina slurry, alumina-containing coating layer, laminated separation membrane, and secondary battery

摘要

The present invention relates to an alumina powder having a ratio (TBD / LBD) of a heavy bulk density (TBD) to a light bulk density (LBD) of 1.5 or more, and an alumina slurry containing the same, an alumina-containing coat layer, and lamination separation The present invention relates to a membrane and a secondary battery.