SINTERED CERAMICS FOR MOUNTING LIGHT EMITTING ELEMENT

摘要

The present invention provides a sintered ceramics for mounting light-emitting element, which is capable to realize high optical reflectance over the entire region from ultraviolet radiation to visible light; the sintered ceramics for mounting light-emitting element comprising a sintered ceramics, wherein the sintered ceramics has a light-reflective face of which reflectance to light in each wavelength in the range of 250nmˆ¼750nm is 70% or more; the light-reflective face satisfies following relation (1) : | R A - R B | ‰¦ 20
when reflectance to light of 750nm is defined as R A %, and reflectance to light of 300nm is defined as R B %; and the sintered ceramics has no layer to be peeled from the light-reflective face when Tape Peeling Test is carried out to the light-reflective face in accordance with the method described in JIS H8504 (1990).