A Novel Blue-Violet Emitting Mechanoluminescent Material with Calcium Aluminosilicate

Zhang, Lin; Li, Chen Shu; Yamada, Hiroshi; Xu, Chao‐Nan

doi:10.4028/www.scientific.net/kem.388.277

Cited by 4 publications

(5 citation statements)

References 6 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%

“…Examples of co-doped ML materials include SrAl 2 O 4 :Eu 2+ (Dy 3+ /Dy 3+ ,Nd 3+ ) [123,231,268], ZnS:Mn 2+ (Te 2+ ) [87,88] [128] and LiN-bO 3 :Pr 3+ (Gd 3+ ) [275]. Co-doping increases the ML intensity by increasing the number of traps in these materials [87,88,91,92,248,267,269,270,275]. Co-doping strategies to increase the ML of a material depend critically on the co-dopants.…”

Section: Ion Co-dopingmentioning

confidence: 99%

“…Effective co-dopants can also be paired by screening libraries of materials that are co-doped with specific ions. Exhaustive screens of this type have identified the following ML materials: CaAl 2 Si 2 O 8 :Eu 2+ (RE), where RE = La, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu [270] and (Ba,Ca)TiO 3 :Pr 3+ (RE), where RE = Y, La, Ce, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu [248]. Here, we summarize findings of a study conducted by Zhang et al who explored the effects of co-dopants on the ML of (Ba,Ca)TiO 3 :Pr 3+ (RE) [248].…”

Section: Ion Co-dopingmentioning

confidence: 99%

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Trap-controlled mechanoluminescent materials

Zhang

Wang

Marriott

et al. 2019

Progress in Materials Science

263

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: Ion Co-dopingmentioning

confidence: 99%

Section: Ion Co-dopingmentioning

confidence: 99%

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Trap-controlled mechanoluminescent materials

Zhang

Wang

Marriott

et al. 2019

Progress in Materials Science

263

196

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“…Only few papers are related to the investigation of EML and PML. The papers related to the studies of EML and PML are: .…”

mentioning

confidence: 99%

Survey of the literature on mechanoluminescence from 1605 to 2013

2014

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Mechanoluminescence (ML) is a type of luminescence induced by any mechanical action on solids. The light emissions induced by elastic deformation, plastic deformation and fracture of solids are called elastico ML (EML), plastico ML (PML) and fracto ML (FML), respectively. Whereas nearly 50% of all organic molecular solids and inorganic salts exhibit FML, only a few solids exhibit EML and PML. The EML and FML of certain solids are so intense that they can be seen during daylight with the naked eye. Mechanolumnescence has a great potential for use in different types of mechano-optical devices such as stress sensors, damage sensors, impact sensors, fracture sensors and safety management monitoring systems. This article reports a survey of the literature from 1605 to 2013. Mechanoluminescence is studied by physicists, chemists, material scientists, geologists, medical scientists, engineers and technologists, among others and researchers will certainly benefit from the literature survey on ML given here. In addition, the field of mechanoluminescence may attract the interest of many new researchers.

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“…Therefore, it is essential to develop novel ML materials with a short-wavelength emission and superior stability. CaAl 2 Si 2 O 8 :Eu 2+ , which was successfully developed in our most recent studies, 7,8 satisfies both requirements because the material has a short-wavelength emission peak of 428 nm and exhibits superior stability to water. However, the ML intensity of CaAl 2 Si 2 O 8 :Eu 2+ is insufficient for practical use.…”

mentioning

confidence: 99%

Enhancement of Mechanoluminescence in CaAl[sub 2]Si[sub 2]O[sub 8]:Eu[sup 2+] by Partial Sr[sup 2+] Substitution for Ca[sup 2+]

Zhang

Yamada

et al. 2010

J. Electrochem. Soc.

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Mechanoluminescence ͑ML͒ in a CaAl 2 Si 2 O 8 :Eu 2+ phosphor was greatly enhanced by partial Sr 2+ substitution for Ca 2+ ; ML intensity reached a maximum at Sr 2+ content of 40 mol %. Moreover, ML was not observed at Sr 2+ content of 80 mol % or higher. To investigate the relationship between ML and the crystal structure, Rietveld refinement of the crystal structures was performed, the results of which suggest that the observed ML enhancement and quenching phenomenon were associated with changes in the crystal lattice and crystal symmetry. Furthermore, the effects of partial Sr 2+ substitution on the structure and photoluminescence characteristics were also investigated, and the emission peak was blueshifted from 428 to 403 nm due to the decrease in the crystal field intensity around Eu 2+ . Based on electroluminescence measurements and the structural properties of the material, a possible mechanism for the enhancement in ML intensity is proposed.Mechanoluminescence ͑ML͒ is an intriguing luminescence phenomenon in which light emission is induced by various mechanical stimuli such as compression, friction, impact, and fracture. 1 The ML phenomenon has been known since the 16th century when it was discovered that crystalline sugar and certain minerals emit light when crushed. A considerable amount of research has focused on the fundamental features of the ML phenomenon. However, practical applications were not investigated until a decade ago, as ML was considered to be a fracture phenomenon and thus only a one-off event.The recently developed ML material SrAl 2 O 4 :Eu 2+ , which exhibits a strong green emission that can be repeatedly induced by weak elastic deformation, was developed by Xu and co-workers a decade ago. 2 This type of ML material has attracted considerable attention due to its potential applications as a stress sensor 3 and excitation source, 4 and many researchers have investigated these new ML materials.To date, several materials exhibiting ML in the elastic deformation region have been successfully developed, including SrAl 2 O 4 :Eu 2+ ͑green͒, 2 ZnS:Mn 2+ ͑yellow͒, 5 and BaTiO 3 -CaTiO 3 :Pr 3+ ͑red͒. 6 Although these phosphors exhibit a strong ML intensity, their luminescence spectra are limited to long wavelengths from green to red. For use as an excitation source, ML materials with a short-wavelength emission are highly desirable for many practical applications. Furthermore, these ML materials still have several problems, for example, the poor water resistance of SrAl 2 O 4 :Eu 2+ and the poor stability of ZnS:Mn 2+ and BaTiO 3 -CaTiO 3 :Pr 3+ . Therefore, it is essential to develop novel ML materials with a short-wavelength emission and superior stability. CaAl 2 Si 2 O 8 :Eu 2+ , which was successfully developed in our most recent studies, 7,8 satisfies both requirements because the material has a short-wavelength emission peak of 428 nm and exhibits superior stability to water. However, the ML intensity of CaAl 2 Si 2 O 8 :Eu 2+ is insufficient for practical use. The purpose of the pr...

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A Novel Blue-Violet Emitting Mechanoluminescent Material with Calcium Aluminosilicate

Cited by 4 publications

References 6 publications

Trap-controlled mechanoluminescent materials

Trap-controlled mechanoluminescent materials

Survey of the literature on mechanoluminescence from 1605 to 2013

Enhancement of Mechanoluminescence in CaAl[sub 2]Si[sub 2]O[sub 8]:Eu[sup 2+] by Partial Sr[sup 2+] Substitution for Ca[sup 2+]

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