STRESS-LUMINESCENT MATERIAL, ITS MANUFACTURING METHOD, COMPOSITE MATERIAL COMPRISING THE SAME, AN

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PROBLEM TO BE SOLVED : To provide a stress-luminescent material that has a characteristic crystal structure and emits unprecedentedly intense light. SOLUTION : The stress-luminescent material has a basic structure where at least either one of an alkali metal ion and an alkaline earth metal ion such as a Ca ion is inserted in a space of a matrix structure formed by linkage of a plurality of molecules of SiO4 and AiO4 having a tetrahedron structure with an oxygen atom positioned at vertexes of the tetrahedron held in common and a part of the inserted ions are replaced by at least one metal ion selected from among rare earth metal ions and transition metal ions functioning as a luminescence center. COPYRIGHT : (C)2007, JPO&INPIT