Patent ID: 11945987
Assignee: NITERRA CO., LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  G  H | IPC C  H

Claim 0:
1. An optical wavelength conversion member comprising a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains represented by formula X3Al5O12:Ce, wherein
X of X3Al5O12:Ce is at least one element selected from the following element group:
X: lanthanoids (except for Ce), Y, and Sc; and
atoms of element X are present also in an Al2O3 crystal grain adjacent to the interface between the Al2O3 crystal grain and an X3Al5O12:Ce crystal grain, wherein said atoms of element X are present at depths of 1 nm to 20 nm as measured from the surface of the Al2O3 crystal grain adjacent to the interface.