High temperature Brillouin scattering study on elastic properties of lithium cesium borate glasses, crystals and melts

Aramomi, Shunsuke; Matsuda, Yu; Kojima, Seiji

doi:10.1016/j.jnoncrysol.2014.03.017

Cited by 9 publications

(5 citation statements)

References 23 publications

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“…The negative deviation was observed from a linear dependence of the L in Figure 7c. A similar negative deviation was also observed in the mixed-cesium lithium borate glasses, 0.25{(1−y)Cs 2 O−yLi 2 O}−0.75B 2 O 3 [31]. These deviations show the enhancement of the change from the M + BØ 4 − to M + BOØ 2 − units caused by the appearance of dissimilar (CsLi) 2+ pairs.…”

Section: Poisson's Ratiosupporting

confidence: 72%

Mixed-Alkali Effect in Borate Glasses: Thermal, Elastic, and Vibrational Properties

Kojima¹

2020

Solids

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When oxide glasses are modified by dissimilar alkali ions, a maximum in the electric resistivity or the expansion coefficient appears, called the mixed-alkali effect (MAE). This paper reviews the MAE on the thermal, elastic, and vibrational properties of the mixed-cesium lithium borate glasses, x{(1−y)Cs2O-yLi2O}-(1−x)B2O3. For the single-alkali borate glasses, xM2O(1−x)-B2O3 (M = Li, Na, K, Rb, and Cs), the glass transition temperature, Tg = 270 °C, of a borate glass monotonically increases as the alkali content x increases. However, for the mixed-cesium lithium borate glasses the Tg shows the minimum against the lithium fraction y. The dependences of the elastic properties on the lithium fraction y were discussed regarding the longitudinal modulus, Poisson’s ratio, and Cauchy-type relation. The internal vibrational bands related to the boron-oxide structural groups and the splitting of a boson peak were discussed based on Raman scattering spectroscopy. The MAE on various physical properties are discussed on the basis of the changes in the coordination number of the borons and the nonbridging oxygens caused by the dissimilar alkali ions.

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Section: Poisson's Ratiosupporting

confidence: 72%

Mixed-Alkali Effect in Borate Glasses: Thermal, Elastic, and Vibrational Properties

Kojima¹

2020

Solids

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“…In contrast, those for the LB glasses were estimated from a fitting curve based on the experimental data found in INTERGLAD, 45 as shown in Figure S2 of SI. The original references of the data are [51, 53, 61, 73, 79, 83, 85, 97–128, 129–138].…”

Section: Methodsmentioning

confidence: 99%

Development of a force field for modeling lithium borosilicate glasses

Urata

Miyajima

Kayaba

et al. 2022

Int J of Appl Glass Sci

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A force field (FF) with a Buckingham function was developed for modeling lithium borosilicate (LBS) glasses using molecular dynamics (MD) simulations. The parameter set of the FF for two-body interaction between Li and O (Li-O) was optimized to reproduce both theoretically calculated force and energy using the density functional theory (DFT) and experimental properties, such as density and mechanical moduli. Bayesian optimization based on a machinelearning technique was employed to efficiently find the best parameter set in a wide parameter space. The accuracy of the MD simulation using the optimized FF of Li-O together with the previously reported FFs for Si-O, B-O, and O-O pairs was examined by comparing with experimentally measured boron coordination numbers (𝑁 𝐵 ) in a variety of LBS glasses. Consequently, it was found that the combination of the FFs is not accurate enough to reproduce the boron coordination change with varying glass compositions. Therefore, the parameter set of the B-O pair was extended to be composition-dependent to reproduce the experimental data on the N 𝐵 . It was confirmed that the empirical parameter correction as a function of 𝐾 = [SiO 2 ]/[B 2 O 3 ] and 𝑅 = [Li 2 O]/[B 2 O 3 ] ratios enables modeling LBS glass consistently with experimental NMR data.

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“…The scattered light is collimated and focused on the input pinhole of a Sandercock-type 3 + 3 pass tandem multi-pass FPI and detected by a photon-counting system. A compact IR furnace is connected to measure a sample at high temperatures [ 48 ]. For the measurements at low temperatures, a heating/cooling stage [ 49 ] or cryostat [ 50 ] is used.…”

Section: Brillouin Scattering Spectroscopy In Materials Sciencementioning

confidence: 99%

“… Experimental setup of micro-Brillouin scattering using a tandem multi-pass Fabry-Perot interferometer [ 48 ]. …”

Section: Figurementioning

confidence: 99%

100th Anniversary of Brillouin Scattering: Impact on Materials Science

Kojima

2022

Materials

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L. Brillouin predicted inelastic light scattering by thermally excited sound waves in 1922. Brillouin scattering is a non-contact and non-destructive method to measure sound velocity and attenuation. It is possible to investigate the elastic properties of gases, liquids, glasses, and crystals. Various kinds of phase transitions, i.e., liquid–glass transitions, crystallization, polymorphism, and denaturation have been studied by changing the temperature, pressure, time, and external fields such as the electric, magnetic, and stress fields. Nowadays, Brillouin scattering is extensively used to measure various elementary excitations and quasi-elastic scattering in the gigahertz range between 0.1 and 1000 GHz. A brief history, spectroscopic methods, and Brillouin scattering studies in materials science on ferroelectric materials, glasses, and proteins are reviewed.

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High temperature Brillouin scattering study on elastic properties of lithium cesium borate glasses, crystals and melts

Cited by 9 publications

References 23 publications

Mixed-Alkali Effect in Borate Glasses: Thermal, Elastic, and Vibrational Properties

Mixed-Alkali Effect in Borate Glasses: Thermal, Elastic, and Vibrational Properties

Development of a force field for modeling lithium borosilicate glasses

100th Anniversary of Brillouin Scattering: Impact on Materials Science

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