Patent ID: 9611425
Date: 2017-04-04
CPC Classifications: C09K

Claim:
1. A method for treating a Mn-activated complex fluoride phosphor comprising: heating a preliminarily-prepared red phosphor of a Mn-activated complex fluoride represented by the following formula (1): wherein M represents at least one tetravalent element selected from the group consisting of Si, Ti, Zr, Hf, Ge and Sn, A represents at least one alkali metal selected from the group consisting of Li, Na, K, Rb and Cs provided that at least Na and/or K is contained, in a substantially oxygen atom-free gas containing a fluorine atom at a temperature in a range of 50° C. to 600° C., and wherein the substantially oxygen atom-free gas containing a fluorine atom is a gas containing at least one of CF