What is the use of white fused alumina powder?

What is the use of white fused alumina powder?
The micropowders of white fused alumina are as follows:
Thermal grease / thermal conductivity
grinding, polishing
Ceramic products/ceramic membrane
Grinding wheel gauze sandpaper
Ceramic glaze, floor coating, pipe coating, polishing paint, etc.
Manufacture of sharpening stones, grinding stones, whetstones, etc.
Production of polishing wax, polishing liquid, polishing paste, etc.
Buttons, mobile phone cases and other polishing slurry, abrasives and other abrasive media
Wear-resistant floors, wear-resistant layers such as fiberglass wear-resistant linings, etc.
Cosmetics in the cosmetic industry, manufacturing of beauty handicrafts, microdermabrasion, etc.
Grinding wheel
Nail Stick/Metal Stick
Polishing Wheel/Nylon Wheel/Line Polishing Wheel/Glass Grinding Wheel
Ceramic filter plate
adhesive
Cutting Disc/Metal Grinding Disc/Carborundum Cutting Disc
jade polishing