摘要:
The present invention relates to a phosphor comprising a nitride or an oxynitride, comprising an X-ray powder diffraction pattern comprising at least one Region having at least one peak with an intensity ratio I of 8% or less, the X-ray powder diffraction pattern measured in the 2θ range from 10° to 60° using a CuKα line (1.54184 {acute over (Å)}), wherein the Region is the 2θ range from 41.5° to 47°, the intensity of each peak is a value obtained after background correction, and the intensity ratio I is defined by the formula (Ip×100)/Imax (%), where Imax represents the height of the most intense peak present in the 2θ range from 34° to 37° and Ip represents the height of each peak.
摘要:
Disclosed is a phosphor raw material which enables the production of phosphors with excellent characteristics and only small amounts of impurities. Specifically disclosed is a phosphor raw material that is in the form of an alloy and contains at least Si and one or more metal elements other than Si. Also disclosed is a method for producing an alloy for phosphor precursor that contains tetravalent metal elements M4 including at least Si and one or more alkaline earth metal elements as divalent metal elements M2. This method for producing an alloy for phosphor precursor is characterized in that a step of melting Si and/or an alloy containing Si is performed before a step of melting alkaline earth metals.