Triboluminescence and the dynamics of crystal fracture

Chandra, B. P.; Zink, Jeffrey I.

doi:10.1103/physrevb.21.816

Cited by 142 publications

(69 citation statements)

References 19 publications

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“…We have confirmed these results in two different experimental systems using different materials, different measurement methods, different fill levels, and different rates of stress. We also found in a final experiment that voltage spikes are formed as crack-like defects in powder beds are opened and closed, and we have proposed that the appearance of these signals may be analogous to voltages produced by failures in other materials (19)(20)(21)(22)(23)(24)(25)(26).…”

Section: Discussionmentioning

confidence: 96%

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Electrostatic precursors to granular slip events

Shinbrot

Kim

Thyagu

2012

Proc. Natl. Acad. Sci. U.S.A.

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It has been known for over a century that electrical signals are produced by material failure, for example during crack formation of crystals and glasses, or stick-slip motion of liquid mercury on glass. We describe here new experiments revealing that slip events in cohesive powders also produce electrical signals, and remarkably these signals can appear significantly in advance of slip events. We have confirmed this effect in two different experimental systems and using two common powdered materials, and in a third experiment we have demonstrated that similar voltage signals are produced by crack-like defects in several powdered materials.

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Section: Discussionmentioning

confidence: 96%

“…First, it has long been known (19) that solids including crystals (20), glasses (21), rocks (22), and ice (23), adhesives such as on plastic tape (24,25), and liquids, for example, mercury (26), all produce electrical signals during failure. Second, it has equally long been known (27) that granular materials must dilate before they can flow.…”

Section: Discussionmentioning

confidence: 99%

Electrostatic precursors to granular slip events

Shinbrot

Kim

Thyagu

2012

Proc. Natl. Acad. Sci. U.S.A.

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“…After switching off the light source, the scotch tape is gently rubbed with a pointed object such as a pencil. For BaSi 2 Fig. 1).…”

Section: Resultsmentioning

confidence: 99%

“…Persistent luminescence in europium doped MSi 2 O 2 N 2 (with M = Ba, Sr, Ca) has been reported recently [19]. In brief, after exposure to UV light ( exc = 280 nm), all three studied phosphors show afterglow emission, although the emission from CaSi 2 …”

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confidence: 99%

Mechanoluminescence in BaSi2O2N2:Eu

et al. 2012

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Mechanoluminescence (ML), a general term for the phenomenon in which light emission occurs during any mechanical action on a solid, can be divided roughly into two classes: destructive ML and non-destructive ML. For practical use in high-end applications (e.g. pressure sensors), materials with non-destructive ML properties are preferred. This paper reports on the strong non-destructive ML in BaSi 2 O 2 N 2 :Eu. When irradiated in advance with UV or blue light, this phosphor shows intense blue-green light emission upon mechanical stimulation such as friction or pressure. The ML has an emission band peaking at 498 nm, which is about 4 nm red-shifted compared to the steady state photoluminescence. The origin of the ML is discussed and related to the persistent luminescence of BaSi 2 O 2 N 2 :Eu. The same traps are responsible for both the phenomena.Based on the occurrence of ML in this phosphor, we were able to derive that the predominant crystallographic structure of BaSi 2 O 2 N 2 :Eu belongs to space group Cmc2 1 .

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“…In the recent past, several materials have been investigated, which emit intense ML during their elastic deformation, plastic deformation, and fracture. These materials have been reported to be useful in stress sensor [2,3], fracture sensor [4,5], damage sensor [6], and in the fusesystem for army warhead [7]. The ML has also been reported to be useful in the online monitoring of grinding in milling machines [8], and in radiation dosimetry [1].…”

Section: Introductionmentioning

confidence: 99%

Mechanoluminescence Study of Europium Doped CaZrO3 Phosphor

Tiwari¹,

Dubey

Kuraria³

2016

J Fluoresc

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Behaviour displayed by mechanoluminescence (ML) in CaZrO3:Eu(3+) doped phosphors with variable concentration of europium ions are described. When the ML is excited impulsively by the impact of a load on the phosphors the ML intensity increases with time, attains a maximum value and then it decreases. In the ML intensity versus time curve, the peak increases and shifts towards shorter time values with increasing impact velocities. Sample was synthesized by combustion synthesis method with variable concentration of Eu(3+) ions (0.1, 0.2, 0.5, 1, 1.5 mol%) and characterized by X-ray diffraction technique. The total ML intensity IT is defined as the area below the ML intensity versus time curve. Initially IT increases with impact velocity V0 of the load and then it attains a saturation value for higher values of impact velocities which follow the relation IT = IT (0) exp.(-Vc/V0) where IT (0) and Vc are constants. Total ML intensity increases linearly with the mass of the phosphors for higher impact velocities. The ML intensity Im, corresponding to the peak of ML intensity versus time curve increases linearly with the impact velocities. The time tm, is found to be linearly related to 1000/V0. The mechanoluminescence induced by impulsive excitation in europium doped CaZrO3 phosphors plays a significance role in the understanding of biological sensors and display device application.

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Triboluminescence and the dynamics of crystal fracture

Cited by 142 publications

References 19 publications

Electrostatic precursors to granular slip events

Electrostatic precursors to granular slip events

Mechanoluminescence in BaSi2O2N2:Eu

Mechanoluminescence Study of Europium Doped CaZrO3 Phosphor

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