Composite-phase fluorescent ceramic as well as preparation method and application thereof

The invention discloses a composite-phase fluorescent ceramic as well as a preparation method and an application thereof. The composite-phase fluorescent ceramic comprises a blocky ceramic substrate and a second phase distributed in the ceramic substrate; the ceramic substrate is selected from any one of substances with the chemical formula represented as the formula I; the formula I is R(3-x1)Cex1AlyGa(5-y)O12; the second phase is selected from any one of substances with the chemical formula represented as the formula II; and the formula II is Ca2Ce(2-x2)Al2SIO7. According to the composite-phase fluorescent ceramic, the problems that light attenuation is caused and spectral stability is not ideal enough due to aging of an encapsulating material containing organic components and luminous efficiency of fluorescent powder is reduced with increase of LED temperature in white light LED development currently are effectively solved. 本申请公开了一种复合相荧光陶瓷以及制备方法和应用。该复合相荧光陶瓷包括块状的陶瓷基体和分布在陶瓷基体中的第二相；陶瓷基体选自具有式Ⅰ所示化学式的物质中的任一种；RCe