Elastico-mechanoluminescence properties of Pr3+-doped BaTiO3–CaTiO3 diphase ceramics with water resistance behavior

The mechanoluminescence (ML) properties of Pr3+-doped BaTiO3–CaTiO3 diphase ceramics in different stressed conditions have been investigated. The results indicate that this ML belongs to elastico-ML (EML) and possesses the advantages of intense emission, non-destruction, repeatability of luminescence, and linear relation between the luminescence intensity and the stress. This EML is considered to have a piezoelectric origin. Furthermore, this material shows superior water resistance property.