| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a wavelength conversion member having inorganic phosphor powder dispersed in a glass matrix, which is excellent in mechanical strength while having a desired chromaticity range.SOLUTION: The wavelength conversion member contains inorganic phosphor powder dispersed in a glass matrix comprising a glass powder sintered body, and has an ion-exchange layer as a glass matrix surface layer. It is preferable that, in the ion-exchange layer, the concentration of an alkali metal ion or an alkaline earth metal ion having a relatively large ion radius decreases inward from the surface of the glass matrix and that the concentration of an alkali metal ion or alkaline earth metal ion having a relatively small ion radius increases inward from the surface of the glass matrix.</p> |
