Patent ID: 11965123
Assignee: STELLA CHEMIFA CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 5:
6. A method for producing red phosphor, which comprises a step of bringing a treatment liquid containing bismuth into contact with a Mn-activated complex fluoride particulate represented by the following general formula (1) and producing a red phosphor consisting of a coated particulate Mn-activated complex fluoride at least partially coated with a coating layer containing bismuth:

A2MF6:Mn4+  (1), wherein A represents at least one alkali metal element selected from the group consisting of lithium, sodium, potassium, rubidium and cesium, and M represents at least one tetravalent element selected from the group consisting of silicon, germanium, tin, titanium, zirconium and hafnium.