Transparent spinel sintered body, optical member and method for producing transparent spinel sintered body

摘要

A spinel sintered body comprising a Mg-Al spinel powder having an Al / Mg ratio of 1.97 to 2.03 or a mixed powder of Mg oxide and Al oxide, wherein the total content of metal impurities other than Al and Mg is less than 100 ppm, A transparent spinel sintered body capable of being used as a medium for transmitting light from an ultraviolet light emitting element having a total light transmittance of 80% or more in a wavelength range from 190 nm to 400 nm in the present invention.