Stress emission material and its manufacturing method

Details Stress emission material and its manufacturing method Stress emission material and its manufacturing method

1999-02-05

2000-12-12

Koslow, C. Melissa

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

25230145, 252961, 2504931, 116212, C09K 1108, C09K 1155, C09K 1156, C09K 1164, C09K 1100

Patent

active

06159394&

ABSTRACT:
The present invention provides a new stress emission material that is different from the other known materials and that efficiently emits light when subjected to a mechanical external force such as a frictional force, a shear force, an impact, or a pressure. This stress emission material is configured by adding an emission center comprising one or more rare earths or transition metals that emit light when electrons excited by a mechanical force return to their normal state, to a base material comprising one or more of an oxide, a sulfide, a carbide, and a nitride each having an FeS.sub.2 structure. This material has an emission intensity that depends on stress.

REFERENCES:
patent: 2630534 (1953-03-01), Heinecke et al.
patent: 4649227 (1987-03-01), Tributsch et al.

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