Blue-Greenish Light Emission from Stress-Activated SrCaMgSi&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;7&lt;/sub&gt;:Eu

Zhang, Hong Wu; Yamada, Hiroshi; Terasaki, Nao; Xu, Chao‐Nan

doi:10.4028/www.scientific.net/kem.368-372.359

Cited by 7 publications

(7 citation statements)

References 13 publications

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“…While offering advantages over conventional stress sensing devices, the low ML intensity of composite materials could undermine their potential to monitor the structural health of buildings and bridges during daylight hours. To date, efforts to increase the intensity of ML of materials have focused on the crystal structures and trap levels of the ML material, for example by optimizing protocols to synthesize ML particles and coatings [17,19,137,150,152,164,166,208,240,[265][266][267][268][269][270][271][272][273][274][275] that include adjusting the composition deficiency (Section 2.2) [142,150,151,173], exposing the material to SHI irradiation (Section 4.7.1) [247], by substituting host ions in the crystal [94,95,194,[265][266][267] and co-doping crystals with rare earth or transition metal ions [87,88,91,92,123,231,248,249,[268][269][270][...…”

Section: Enhancement Of ML Intensitymentioning

confidence: 99%

“…The substitution of host ions in the crystal can also increase the intensity of ML, in part by creating additional traps at energy levels associated with ML in the crystal. ML materials of this class include (Ba,Ca)TiO 3 :Pr 3+ [143], (Sr,M)MgSi 2 O 7 :Eu 2+ (M = Ba, Sr, Ca) [95,265], CaZnOS:Mn 2+ ,Li + [274], (Sr,Ca,Ba) 2 SnO 4 :Sm 3+ ,La 3+ [266] and Sr 3 (Sn,Si/Ge) 2 O 7 :Sm 3+ [267].…”

Section: Substitution Of Host Ionsmentioning

confidence: 99%

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Trap-controlled mechanoluminescent materials

Zhang

Wang

Marriott

et al. 2019

Progress in Materials Science

282

196

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Mechanoluminescence (ML) is generated during exposures of certain materials to mechanical stimuli. Many solid materials produce ML during their fracturing, however, the irreversibility of fracto-induced ML limits the practical applications of these materials. In 1999, Chao-Nan Xu discovered an intense and reproducible ML from trap-controlled materials, including ZnS:Mn 2+ and SrAl 2 O 4 :Eu 2+ , and introduced the principles and applications of hybrid inorganic/organic mechanoluminescent (ML) composites, and related sensors to visualize stress/strain in target structures. This discovery has triggered intense research interest in trap-controlled ML materials and composites over the past 2 decades. Notable achievements of this research include the development of trap-controlled materials that exhibit bright ML emission from the ultraviolet to the near infra-red, and multiscale mechano-optical sensitivities. This research has also increased our understanding of the mechanisms of ML phenomena, enabling the rational design of trap-controlled ML materials. Practical applications of ML are also being driven by the discovery that ML composites can serve as "mechano-optical sensitive skin" for structural health diagnosis, stress sensors for biomechanics, and mechanically-activated light sources. This review focuses on the design, synthesis, characterization, optimization and application of trap-controlled ML materials, and concludes with discussions on future directions of ML research and specific challenges to improve ML materials for real-world applications.

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Section: Enhancement Of ML Intensitymentioning

confidence: 99%

Section: Substitution Of Host Ionsmentioning

confidence: 99%

Trap-controlled mechanoluminescent materials

Zhang

Wang

Marriott

et al. 2019

Progress in Materials Science

282

196

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“…8, it can be seen that the linear increase of impact velocity can induce the increase of ML intensity, which shows the excellent linear relation. That is, the ML intensities of Sr 2 MgSi 2 O 7 :Eu 2+ and Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ phosphors are linear proportional to the magnitude of the impact velocity, which suggests that this phosphor can be used as a sensor to detect the stress of an object (39)(40)(41)(42). close to linearity, even at the start, which suggests that this phosphor can be used as a sensor to detect the stress of an object.…”

Section: Mechanoluminescence (Ml)mentioning

confidence: 99%

Enhancement of the photoluminescence and long afterglow properties of Sr₂MgSi₂O₇:Eu²⁺ phosphor by Dy³⁺ co‐doping

et al. 2015

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Sr2MgSi2O7:Eu(2+) and Sr2MgSi2O7:Eu(2+),Dy(3+) long afterglow phosphors were synthesized under a weak reducing atmosphere by the traditional high temperature solid state reaction method. The synthesized phosphors were characterized by powder X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), and photo-, thermo- and mechanoluminescence spectroscopic techniques. The phase structure of the sintered phosphor was an akermanite type structure, which belongs to tetragonal crystallography. The thermoluminescence properties of these phosphors were investigated and compared. Under ultraviolet light excitation, the emission spectra of both prepared phosphors were composed of a broad emission band peaking at 470 nm. When the Sr2MgSi2O7:Eu(2+) phosphor was co-doped with Dy(3+), the photoluminescence (PL), afterglow and mechanoluminescence (ML) intensity were strongly enhanced. The decay graph indicated that both the sintered phosphors contained fast decay and slow decay processes. The ML intensities of Sr2MgSi2O7:Eu(2+) and Sr2MgSi2O7:Eu(2+),Dy(3+) phosphors were increased proportionally with increasing impact velocity, a finding that suggests that these phosphors could be used as sensors to detect the stress of an object.

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“…[1][2][3] Thus, so far, ML materials, which are repeatedly usable in elastically deformed region, have been vigorously investigated, and achieved various types of emission colors from UV to infra-red, sizes from 10 nm through 100 µm, and shapes such as sphere, rod, and sheet. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] In addition, interestingly, when dispersedly coated onto a structure, each particle acts as a sensitive mechanical sensor, while a twodimensional (2D) emission pattern of the whole assembly reflects the dynamical strain=stress distribution, 2,3,[19][20][21][22][23][24] as shown in Fig. 1(a).…”

Section: Introductionmentioning

confidence: 99%

Mechanoluminescence assisting agile optimization of processing design on surgical epiphysis plates

Terasaki

Toyomasu

Sonohata

2018

Jpn. J. Appl. Phys.

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We propose a novel method for agile optimization of processing design by visualization of mechanoluminescence. To demonstrate the effect of the new method, epiphysis plates were processed to form dots (diameters: 1 and 1.5 mm) and the mechanical information was evaluated. As a result, the appearance of new strain concentration was successfully visualized on the basis of mechanoluminescence, and complex mechanical information was instinctively understood by surgeons as the designers. In addition, it was clarified by mechanoluminescence analysis that small dots do not have serious mechanical effects such as strength reduction. Such detail mechanical information evaluated on the basis of mechanoluminescence was successfully applied to the judgement of the validity of the processing design. This clearly proves the effectiveness of the new methodology using mechanoluminescence for assisting agile optimization of the processing design.

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Blue-Greenish Light Emission from Stress-Activated SrCaMgSi<sub>2</sub>O<sub>7</sub>:Eu

Cited by 7 publications

References 13 publications

Trap-controlled mechanoluminescent materials

Trap-controlled mechanoluminescent materials

Enhancement of the photoluminescence and long afterglow properties of Sr₂MgSi₂O₇:Eu²⁺ phosphor by Dy³⁺ co‐doping

Mechanoluminescence assisting agile optimization of processing design on surgical epiphysis plates

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Blue-Greenish Light Emission from Stress-Activated SrCaMgSi<sub>2</sub>O<sub>7</sub>:Eu

Cited by 7 publications

References 13 publications

Trap-controlled mechanoluminescent materials

Trap-controlled mechanoluminescent materials

Enhancement of the photoluminescence and long afterglow properties of Sr2MgSi2O7:Eu2+ phosphor by Dy3+ co‐doping

Mechanoluminescence assisting agile optimization of processing design on surgical epiphysis plates

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Enhancement of the photoluminescence and long afterglow properties of Sr₂MgSi₂O₇:Eu²⁺ phosphor by Dy³⁺ co‐doping