ALUMINA POWDER AND SLURRY CONTAINING THE SAME, ALUMINA POROUS FILM AND LAMINATED SEPARATOR COMPRISING THE SAME, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND PRODUCTION METHOD THEREFOR

摘要

The alumina powder of the present disclosure has an average three-dimensional particle unevenness of 3.5 or less, and has a ratio of (pyridine adsorption BET specific surface area)/ (nitrogen adsorption BET specific surface area) of 0.7 or less.