Alumina sintered body precursor, alumina sintered body manufacturing method, grinding stone particle manufacturing method and alumina sintered body

摘要

As a precursor of an alumina sintered body comprising aluminum, yttrium, and at least one metal selected from the group consisting of aluminum, zinc, cobalt, manganese, copper, niobium, antimony, tungsten, silver and gallium, the content of the aluminum is In 100 mass % of the precursor of the alumina sintered body, 98.0 mass % or more in terms of oxide (Al 2 O 3 ), the content of the yttrium relative to 100 parts by mass of the content of aluminum in terms of oxide, oxide (Y 2 O 3 ) 0.01 to 1.35 parts by mass in terms of the total content of the metal selected from the group is 0.02 to 1.55 parts by mass in terms of oxide with respect to 100 parts by mass of the content of aluminum in terms of oxide, and containing the aluminum as α alumina Precursor of alumina sintered body.