Stress emission material and its manufacturing method
US6159394A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1999 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Feb 5, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S252/961
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.