Freeze-drying to prepare a powder and alumina powder - Nanoporous ultrafine alpha

摘要

A nanoporous α- alumina powder, the present invention provides nano comprising a powder comprising primary particles α- Alumina interconnected less than about 100 nm average particle size, and interpenetration rows of pores or voids I will provide a porous α- alumina powder. The present invention, nanosized α- alumina powder containing less than about 100 nm average particle size α- alumina particles, and a slurry containing nanosized α- alumina powder of the present invention, there is provided an aqueous slurry, for example. Furthermore, the manufacturing method of the nano-sized alumina powder and α- nanoporous α- alumina powder of the present invention, and the present invention provides a polishing method using the slurry of the present invention.