| 简介 |
PURPOSE : A wavelength converting member is provided to produces light of more uniform color with a minimized loss thereof since the light transmitting through the wavelength converting member is scattered at the interface between the garnet phase and the perovskite, monoclinic or silicate phase.
CONSTITUTION : A wavelength converting member comprising a polycrystalline sintered ceramic comprises : (A) a garnet phase having chemical formula (1) : (A1-xBx)3C5O12; and (B) at least one phase selected from the group consisting of perovskite, monoclinic and silicate phases, wherein fine grains of phase (B) are included and dispersed in phase (A). In chemical formula, A is at least one rare earth element selected from the group consisting of Y, Gd, and Lu, B is at least one rare earth element selected from the group consisting of Ce, Nd, and Tb, C is at least one element selected from the group consisting of Al and Ga, and x is a number from 0.002 to 0.2.
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