Abstract
We have investigated the mechanoluminescence (ML) of Eu,Dy co-doped strontium aluminates. The SrAl 2O 4 and Sr 3Al 2O 6 indicate high ML intensity, which is clearly visible to the naked eye in the air. SrAl 2O 4:Eu,Dy shows the highest ML intensity and has many filled traps, high quantum efficiency and moderate stiffness. On the other hand, Sr 3Al 2O 6:Eu,Dy does not have many filled traps and high relative quantum efficiency, but Sr 3Al 2O 6:Eu,Dy shows relatively high ML intensity. Sr 3Al 2O 6:Eu,Dy indicates low stiffness. SrAl 4O 7:Eu,Dy has many filled traps and high relative quantum efficiency, but SrAl 4O 7:Eu,Dy shows very small ml intensity. SrAl 4O 7:Eu,Dy indicates high stiffness. This suggests that the stiffness is an important factor for the ML intensity of the Eu,Dy co-doped strontium aluminate system.
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