Agc Inc.

Tokyo University of Science Foundation

Atsuo Yasumori

Kei Maeda

Naoko Matsui

Tetsuo Kishi

The present invention pertains to glass containing, in terms of mass % on an oxide basis, 40-80% of SiO, 1-30% of AlO, and 1-40% of CaO, the glass having dmisteinbergite as the crystalline phase. Such glass makes it difficult for cracks to progress and has exceptional crack resistance.

Glass having exceptional crack resistance

Provided is a light-emitting glass which is applicable to, e.g., white illuminators including a light-emitting diode as a light source, and which emits light of a warm white color when irradiated with near ultraviolet light and combines long-term weatherability with high heat resistance; a light-emitting device containing same and a process for producing same. The light-emitting glass includes, as the base glass, borosilicate or silicate glass having a separated-phase structure, whereby the base glass is efficiently doped with, for example, transition metal ion clusters which emit light of a warm white color upon irradiation with near ultraviolet light. With this glass, it is possible to attain increases in excitation wavelength and emission wavelength. The glass thus emits, based on a multiple scattering effect, high-intensity light of a warm white color upon irradiation with near ultraviolet light.

Growing community of inventors

Tokyo, Japan

Atsuo Yasumori