abstract |
The present invention provides a method for producing a silicate blue phosphor having a high luminance and a chromaticity (y) equal to or smaller than that of BAM: Eu. The present invention relates to a cerium oxide of the general formula aAO bEuO (Mg 1-w , Zn w ) O.cSiO 2 .dCaCl 2 wherein A is at least one selected from Sr, Ba and Ca, 2.970? A? 3.500, 1? 10? 10? Atm to 1 x 10 -10 atm, wherein the phosphor has an oxygen partial pressure of 1 x 10 < -15 > Wherein the heat treatment is performed in a gas atmosphere at 1200 占 폚 to 1400 占 폚. |