Improvement in Mechanoluminescence Intensity of Ca[sub 2]Al[sub 2]SiO[sub 7]:Ce by the Statistical Approach

Akiyama, Morito; Xu, Chao‐Nan; Nonaka, Kazuhiro

doi:10.1149/1.1566418

Cited by 12 publications

(8 citation statements)

References 20 publications

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“…Element deficiency can be controlled through the judicious choice of component materials, and the condition used to volatize the element. Sr vacancies in SrAl 2 O 4 :Eu 2+ are created using a Sr non-stoichiometric approach [16] and, relatedly, in Ca 2 Al 2 SiO 7 :Ce 3+ by manipulating the compositions of Ca and Si [150]. Several studies have shown that the conditions of volatilization and reaction of elements during the heat-treatment process generate materials with a higher ML intensity, including those harboring oxygen vacancies, sulfide vacancies, zinc vacancies and calcium vacancies [84,85,100,102,151].…”

Section: Trap Formationmentioning

confidence: 99%

“…Piezoelectricity, as it relates to ML, may arise directly from the non-centrosymmetric crystal structure of host materials, or indirectly from a change in the local crystal structure near a defect or impurity [83,97,101,102,112,150,186,194,207,[255][256][257][261][262][263]. Relationships between specific structural properties of the material and the differentiated piezoelectricity that generate ML are unknown.…”

Section: Materials Exploitation Based On Piezoelectricity and Carrier mentioning

confidence: 99%

“…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%

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Trap-controlled mechanoluminescent materials

Zhang

Wang

Marriott

et al. 2019

Progress in Materials Science

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255

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: Trap Formationmentioning

confidence: 99%

Section: Materials Exploitation Based On Piezoelectricity and Carrier mentioning

confidence: 99%

Section: Enhancement Of ML Intensitymentioning

confidence: 99%

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Trap-controlled mechanoluminescent materials

Zhang

Wang

Marriott

et al. 2019

Progress in Materials Science

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255

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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“…In the literature, for the Sr 2 Al 2 SiO 7 structure, cations are found on three kinds of site: the large eight‐fold coordinated site occupied by the Sr 2+ and Al 3+ took up two types of tetrahedral sites, and Si 4+ occupied the other type of this tetrahedral site. [8,21–23] In addition, since Sr 2+ and Mg 2+ are alkaline‐earth metal elements and have similar physical and chemical characteristics, the crystalline structure will remain constant when Mg 2+ ions are substituted for Sr 2+ ions, meaning that the crystalline structure and diffraction patterns in SrMgAl 2 SiO 7 are similar to those of Sr 2 Al 2 SiO 7 . It is worth mentioning that the diffraction pattern for the sample calcinated at 1200°C for 4 h was found to be exactly the same as that of Sr 2 Al 2 SiO 7 reported on JCPDS Card no.…”

Section: Resultsmentioning

confidence: 99%

Sol–gel synthesis, characterization and luminescence properties of SrMgAl₂SiO₇:Eu²⁺ as a novel nanocrystalline phosphor

et al. 2010

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In this research, a new SrMgAl(2) SiO(7):Eu(2+) phosphor was synthesized via the sol-gel method. The phase-forming processes were studied by thermogravimetric-differential thermal analysis and X-ray diffraction technique. Scanning electron microscopy showed that there is uniform morphology and microstructure owing to the sol-gel route. Spectrophotometry and colorimetry analyses illustrated that, under short ultraviolet excitation, the main emission peak occurred at 421 nm and also a relatively pure blue color was observed that was ascribed to the 4f(6) 5d(1) ((2) D) → 4f(7) ((8) S(7/2)) transition of Eu(2+) with color coordination of x = 0.187, y = 0.077. Finally, it was found that the color and phase purity of the synthesized powder increased as calcinations time increased.

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Improvement in Mechanoluminescence Intensity of Ca[sub 2]Al[sub 2]SiO[sub 7]:Ce by the Statistical Approach

Cited by 12 publications

References 20 publications

Trap-controlled mechanoluminescent materials

Trap-controlled mechanoluminescent materials

Survey of the literature on mechanoluminescence from 1605 to 2013

Sol–gel synthesis, characterization and luminescence properties of SrMgAl₂SiO₇:Eu²⁺ as a novel nanocrystalline phosphor

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Improvement in Mechanoluminescence Intensity of Ca[sub 2]Al[sub 2]SiO[sub 7]:Ce by the Statistical Approach

Cited by 12 publications

References 20 publications

Trap-controlled mechanoluminescent materials

Trap-controlled mechanoluminescent materials

Survey of the literature on mechanoluminescence from 1605 to 2013

Sol–gel synthesis, characterization and luminescence properties of SrMgAl2SiO7:Eu2+ as a novel nanocrystalline phosphor

Contact Info

Product

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Sol–gel synthesis, characterization and luminescence properties of SrMgAl₂SiO₇:Eu²⁺ as a novel nanocrystalline phosphor