| abstract |
In the following formula (I) A2MF6: Mn (I) (wherein M is one or two or more kinds of tetravalent elements selected from Si, Ti, Zr, Hf, Ge, and Sn, and A is Li, Na, K, Rb, and Cs are selected and contain at least one or two or more alkali metals of Na and/or K. In the production of the Mn-activated complex fluoride red phosphor, the various components which are raw materials are sequentially dissolved in water, and the red phosphor is finally precipitated in the solution from the obtained aqueous solution to be a special complex fluoride. According to the present invention, since the raw materials can be sequentially added in one reaction container, the re-fluorinated phosphor can be produced with reasonable and high productivity. |