Fractoluminescence and Dislocation Density of Ionic Crystals after X-Ray Irradiation

Fractoluminescence and Dislocation Density of Ionic Crystals after X-Ray Irradiation

Fractoluminescence (FL) has been observed by three bending tests of KCl single crystals doped with Ca2+, the size of which is 3 × 1 × 12mm3. FL has occurred only in the vicinity of fracture surface (within 0.3mm) and FL intensity as well as dislocation density has sharply decreased with increasing d...

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Veröffentlicht in:Journal of the Society of Materials Science, Japan Japan, 2008, Vol.57(2), pp.154-158
Hauptverfasser: TANIO, Hiroki, NAKAMURA, Shoichi, OHGAKU, Tomiyasu
Format: Artikel
Sprache:eng ; jpn
Schlagworte:
Dislocation
Fractoluminescence
Ionic crystal
X-ray irradiation
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Zusammenfassung:Fractoluminescence (FL) has been observed by three bending tests of KCl single crystals doped with Ca2+, the size of which is 3 × 1 × 12mm3. FL has occurred only in the vicinity of fracture surface (within 0.3mm) and FL intensity as well as dislocation density has sharply decreased with increasing distance from fracture surface. And the dislocation density has approached to the initial one. Collecting data from many samples, it has been found that the FL intensity is proportional to the three-half power of the dislocation density. The relation between FL intensity and dislocation density has been explained by dislocation intersection.
ISSN:0514-5163
1880-7488
DOI:10.2472/jsms.57.154