| 摘要 |
A practical novel phosphor material composed of an �-type silicon nitride, i.e., an �-type silicon nitride phosphor containing a fluorescence-emittable element throughout an �-type silicon nitride particle from the surface to the inside, is provided. Portions having a high emittable element concentration are preferably present like islands, and the fluorescence-emittable element is preferably a lanthanide metal. A powder composed of a fluorescence-emittable element is added to silicon diimide (Si(NH) 2 ) or an amorphous silicon nitride powder obtained by thermally decomposing silicon diimide (Si(NH) 2 ), the powders are mixed, and the mixture is fired in a non-oxidizing atmosphere, whereby the phosphor material is obtained. |
