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Satatistical Model of Mechanoluminescence in Crtstals
Author(s) -
Chandra B. P.,
Rahangdale Yuvaraj,
Ramrakhiani Meera,
Aansari M. H.,
Sharma Y. K.
Publication year - 1992
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170270425
Subject(s) - mechanoluminescence , materials science , intensity (physics) , emission intensity , stress (linguistics) , photoluminescence , quenching (fluorescence) , analytical chemistry (journal) , composite material , phosphor , optics , chemistry , fluorescence , physics , optoelectronics , chromatography , philosophy , linguistics
The present paper reports on a statistical model of the mechanoluminescence (ML) excitation in crystals where attempts have been made to explain stress, temperature‐, strain rate‐, activator concentration dependence and several other aspects of ML. It is found that ML emission should take place only during the period at which stress will change with time. The total ML intensity should be directly proportional to the square of the stress and there should be phase difference between the ML pulse and the applied stress pulse. It is found that the ML intensity should decrease faster with temperature as compared to the corresponding photoluminescence intensity. within the limit of concentration quenching the ML intensity should increase directly with the defect centre concentration. The ML intensity should increase with the stress rate or strain rate of the solids. Furthermore, the concept of mechanoluminescent and non‐mechanoluminescent materials is explored.