Open AccessФракто- и фотолюминесценция кварца при разрушении
Author(s) -
В.И. Веттегрень,
А.Г. Кадомцев,
И.П. Щербаков,
Р.И. Мамалимов
Publication year - 2021
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2021.08.51165.060
Subject(s) - spectral line , quartz , excited state , materials science , diamond , intensity (physics) , photoluminescence , maxima , analytical chemistry (journal) , mineralogy , composite material , optics , atomic physics , chemistry , optoelectronics , physics , chromatography , astronomy , art , performance art , art history
The fractoluminescence (FL) spectra at the destruction of the quartz surface by "micro-cutting" of diamond micro crystals and impact on its surface with a steel striker and photoluminescence (PL) spectra after "micro-cutting" are obtained. Band of 2.12 eV in the FL spectra was attributed to excited Si-O● radicals. FL consist from a set of signals whose duration was ≈ 50 ns, and their intensity varies by an order of magnitude. The time interval between the signals varies from ≈ 0.1 to several µs. Signals generated at impact contain five, and at "micro-cutting" contain four superimposed maxima. It is assumed that the FL signals appear when the barriers that prevent the movement of dislocations along the sliding planes breaks, and the smallest "primary" cracks are formatted. The rate constants of growth the cracks and fading of FL after the cracks stops are determined. The average size of the "primary" cracks surfaces after impact is ≈ 5 nm2, and after "micro-cutting" is ≈ 25 nm2. In the PL spectra after the fracture, a band of 2.4 eV was observed, which is attributed to non excited ≡Si-O- radicals on the cracks surface after their stop.