Recovery phenomenon of mechanoluminescence from Ca2Al2SiO7:Ce by irradiation with ultraviolet light

We have investigated the mechanoluminescence (ML) from Ca2Al2SiO7:Ce. The ML is clearly visible to the naked eye in the atmosphere. The luminescence integrated intensity is about 400 times as high as that of crystal sugar. The ML center has been identified as the Ce3+ ion from spectra of the ML and also from the photoluminescence studies of Ca2Al2SiO7:Ce. The ML intensity decreases on repetitive application of stress but is completely recovered by irradiation with ultraviolet light. It is suggested that the ML mechanism arises from the movement of dislocations and recombination between electrodes and holes released from these traps which are associated with the Ce3+ centers.

[1]  A. Walton,et al.  Triboluminescence of glasses and quartz , 1983 .

[2]  Hiroaki Yanagida,et al.  Self-Diagnosis of Fracture in CFGFRP Composites and CFGFRP-Reinforced Concrete , 1992 .

[3]  G. Reynolds.  Piezoluminescence from a ferroelectric polymer and quartz , 1997 .

[4]  Chao-Nan Xu,et al.  Artificial skin to sense mechanical stress by visible light emission , 1999 .

[5]  L. Girifalco,et al.  STRESS ACTIVATED LUMINESCENCE IN X-IRRADIATED ALKALI HALIDE CRYSTALS , 1957 .

[6]  A. Kruglov,et al.  ON THE LUMINESCENCE OF $gamma$-IRRADIATED KCl CRYSTALS INDUCED BY PLASTIC DEFORMATION. , 1966 .

[7]  B. T. Brady,et al.  Laboratory investigation of the electrodynamics of rock fracture , 1986, Nature.

[8]  B. P. Chandra,et al.  Theory of Mechanoluminescence Kinetics in Coloured Alkali Halide Crystals , 1992 .

[9]  B. P. Chandra.  Luminescence induced by moving dislocations in crystals , 1996 .

[10]  K. Nonaka,et al.  Intense visible light emission from Sr3Al2O6:Eu,Dy , 1998 .

[11]  G. Alzetta,et al.  Excitation of triboluminescence by deformation of single crystals , 1970 .

[12]  Chao-Nan Xu,et al.  Direct view of stress distribution in solid by mechanoluminescence , 1999 .

[13]  Measurements of transient electric current associated with indentation fracture and deformation of brittle solids , 1996 .

[14]  Kawaguchi.  Time-resolved fractoluminescence spectra of silica glass in a vacuum and nitrogen atmosphere. , 1995, Physical review. B, Condensed matter.

[15]  C. T. Butler.  Room-Temperature Deformation Luminescence in Alkali Halides , 1966 .

[16]  A. Walton,et al.  Triboluminescence of fluorites , 1983 .

[17]  Katsuhisa Tanaka,et al.  Full color triboluminescence of rare-earth-doped hexacelsian (BaAl2Si2O8) , 1998 .