| abstract |
(57) Abstract: A method for producing a rare earth phosphate phosphor capable of effectively improving lamp characteristics is provided. SOLUTION: The general formula (La 1-xy Ce x Tb y ) PO 4 (However, x> 0, Y> 0, 0.1 ≦ x + y ≦ 0.8) In the method for producing a rare earth phosphate phosphor shown by, A rare earth phosphate produced by a reaction by mixing a solution containing a rare earth element and a solution containing a phosphoric acid compound in an acidic solution having a pH value of 3 or less or a solution containing a hydroxide of a rare earth element. A method for producing a rare earth phosphate phosphor, which comprises separating and purifying the phosphor. |