| 摘要 |
PROBLEM TO BE SOLVED: To provide a method that allows a phosphor with a high maintenance factor of emission intensity in continuous emission to be produced without significant reduction in external quantum efficiency.SOLUTION: The present invention provides a method comprising the steps of heating a mixture of phosphor powder and ammonium fluoride at 200-600°C, and attaching an aluminum coupling agent on the surface of the heated phosphor powder before further heating at 400°C or higher.SELECTED DRAWING: None |
