| 摘要 |
PROBLEM TO BE SOLVED: To provide a stress luminescence material different from those previously known, which efficiently emits light by mechanical external force such as friction force, shear force, impact force, pressure, etc. SOLUTION: The objective material is prepared by adding one or more luminescence center, which is a rare-earth or transition metal which emits light when an electron excited by mechanical energy reverts to the ground state, to a mother material comprising one or more from an oxide, sulfide, carbide or nitride of an FeS2 structure. This stress luminescence material exerts a stress-dependent luminescence strength.
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