| 摘要 |
PROBLEM TO BE SOLVED: To provide a substrate of light-emitting element mounting use which enables the formation of a light-emitting element module having a high luminance in a visible light region; and a reliable light-emitting element module of high luminance.SOLUTION: A substrate 1 for light-emitting element mounting use comprises: an alumina-based sintered material including zirconia, the content of which is 3 mass% or more and 15 mass% or less to 100 mass% of all of components constituting the alumina-based sintered material in terms of ZrO. The reflectance to wavelengths in a region of 450-550 nm is 80% or more with a thickness 0.3 mm, and the total of the reflectance and transmittance is 95% or more. A light-emitting element module 10 comprises: the substrate for light-emitting element mounting use; and a light-emitting element 2 mounted on the substrate. |
