LiNbO3 films: Potential application, synthesis techniques, structure, properties

Sumets, M.; Dybov, V.; Иевлев, В. М.

doi:10.1134/s0020168517130015

Cited by 23 publications

(8 citation statements)

References 111 publications

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“…Given the great variety of physical and chemical properties that can be ascribed to lithium niobate (LiNbO 3 ; LN), it can be classified into several subclasses of materials. Ever since the pioneering work at Bell Laboratories-published in 1966 [1][2][3][4][5]-a myriad of well-known existent and potential applications of this material have been addressed, which are described elsewhere [6][7][8][9][10][11]. Interestingly enough, apart from its structure, the definition or description of LN is given in accordance with the particular property or application to be investigated.…”

Section: Introductionmentioning

confidence: 99%

Structural and Magnetic Behavior of Oxidized and Reduced Fe Doped LiNbO3 Powders

et al. 2018

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Changes in structural and magnetic properties have been systematically induced in lithium niobate (LiNbO 3) powders, Fe-doped with different concentrations and thermally treated in oxidized and reduced states. A rather strong ferromagnetic response at room temperature with a saturation magnetization of 0.96 Am 2 kg −1 was obtained for the higher utilized doping concentration, which is of the order of 1% mol. This may be considered a first report of the manifestation of ferromagnetism in nanocrystalline lithium niobate powders within the regime of very low Fe-doping concentrations. Post-thermal treatment in a controlled atmosphere is key for inducing and detecting this behavior, which can also be explained as the effective recombination of Fe impurities with oxygen vacancies in the surface of the material. Mechanochemical-calcination was employed for the synthesis of LiNbO 3 powders and after that, a diffusion process of 0.44%, 0.89%, 1.47% and 2.20% mass of Fe 2 O 3 was used in the Fe-doping. Oxidation and reduction processes were performed using a controlled atmosphere of ultra-high purity oxygen and hydrogen, respectively. X-ray diffraction and Raman spectroscopy were employed to characterize the materials. The magnetic properties were studied using Vibration Sample magnetometry and Electron Spin Resonance spectroscopy.

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Section: Introductionmentioning

confidence: 99%

Structural and Magnetic Behavior of Oxidized and Reduced Fe Doped LiNbO3 Powders

et al. 2018

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“…In this study, the Open Specy spectra that correlated better with the blue fiber spectrum were those of PbO, synthetic rhodostannite (Cu 2 FeSn3S 8 ), and lithium triniobate (LiNbO3) (Supplementary Figure S3, supplementary material). These three compounds or similar compounds (such as Cu 2 FeSnS 4 ) are associated with electronic devices production (Pugh et al, 2013;Baláž et al, 2017;Sumets et al, 2017). These are largely inappropriately disposed and end up in landfills or nature (Wong et al, 2007;Li and Achal, 2020;Patil and Ramakrishna, 2020).…”

Section: Discussionmentioning

confidence: 99%

Microplastics in sediments of the Pantanal Wetlands, Brazil

Camargo

Girard

Sanz‐Lázaro

et al. 2022

Front. Environ. Sci.

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Microplastics (<5 mm) can have negative and deleterious environmental effects. However, the scarce information on the levels of microplastics and the factors underlying their input in wetlands, limits the understating of the vulnerability of these ecosystems to microplastics. To contribute closing this important information gap, the concentration (items/m−2), size and the variables related to the distribution of microplastics in fluvial sediments of the Cuiabá River, a tributary of the Pantanal, the world largest flooded Savanna and a UNESCO World Heritage were investigated. The mean microplastic level was 576.8 ± 577.8 items/m−2 of sediments which were mainly fragments (309.0 ± 319.6 items/m−2) and fibers (267.8 ± 339.9 items/m−2). The maximum level was 1938.8 items/m−2 found in the urban stretch of the sister cities of Cuiabá and Várzea Grande, the largest urban agglomeration in the study area. Unexpectedly, the composition of the microplastic with highest average level (240.7 ± 310.4 items/m−2), a blue synthetic fiber, could not be unequivocally determined by RAMAN spectrometry. Its complex composition includes Pb, Li and Nb, suggesting it may derive from electronic waste. Polypropylene (159.2 ± 133.4 items/m−2) and Polyvinyl Chloride (104.6 ± 217.2 items/m−2) were the second and third polymers with higher average levels. The average size of microplastics particles in sampling sites ranged from 0.18 mm to 1.74 mm. Microplastic concentration was positively related to urban areas. Similarly, microplastics particles size decreased with distance from urban areas. These results suggest that urban areas along the Cuiabá River, with poor waste management, are a major source of microplastic pollution in the Pantanal floodplain and that electronic waste might contribute significantly to this contamination. This study highlights the importance of adequate waste management in cities to limit microplastic contamination in areas of ecological importance, such as the Pantanal.

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“…A detail description of crystal structure of LNO shows that it belongs to a R3c space group. 40,41 The oxide ions are arranged in nearly hexagonal close-packed planar sheets and the stacking sequence of cations in these octahedral sites is: Nb, Li, vacancy, Nb, Li, vacancy. and so on or LiO 6 , NbO 6 and VO 6 ., where V stands for vacancy.…”

Section: Electrical Propertiesmentioning

confidence: 99%

Simultaneous tuning of optical and electrical properties in a multifunctional LiNbO₃ matrix upon doping with Eu³⁺ ions

et al. 2020

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LiNbO3 films: Potential application, synthesis techniques, structure, properties

Cited by 23 publications

References 111 publications

Structural and Magnetic Behavior of Oxidized and Reduced Fe Doped LiNbO3 Powders

Structural and Magnetic Behavior of Oxidized and Reduced Fe Doped LiNbO3 Powders

Microplastics in sediments of the Pantanal Wetlands, Brazil

Simultaneous tuning of optical and electrical properties in a multifunctional LiNbO₃ matrix upon doping with Eu³⁺ ions

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LiNbO3 films: Potential application, synthesis techniques, structure, properties

Cited by 23 publications

References 111 publications

Structural and Magnetic Behavior of Oxidized and Reduced Fe Doped LiNbO3 Powders

Structural and Magnetic Behavior of Oxidized and Reduced Fe Doped LiNbO3 Powders

Microplastics in sediments of the Pantanal Wetlands, Brazil

Simultaneous tuning of optical and electrical properties in a multifunctional LiNbO3 matrix upon doping with Eu3+ ions

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Product

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Simultaneous tuning of optical and electrical properties in a multifunctional LiNbO₃ matrix upon doping with Eu³⁺ ions