Microstructure, cytocompatibility, and chemical durability of chemically strengthened LAS (Li2O-Al2O3-SiO2) glass-ceramic materials

Zhang, Yaming; Li, Bingbing; Li, Ding; Yao, Jia; Lyu, Xigeng; Zhou, Ming; Zhang, Zhenzhen; Meng, Meng; Wang, Fu

doi:10.1016/j.jeurceramsoc.2022.06.063

Cited by 18 publications

(3 citation statements)

References 34 publications

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“…29 Si MAS NMR spectra of 5–20 M CSp are shown in Figure 2 a–d. All the spectra featured broad and asymmetric bands covering the chemical shifts of the Q 2 , Q 3 , and Q 4 units [ 38 , 39 ]. Here, Q denotes silicon bonded to four oxygen atoms, and 2–4 represent the amount of bridging oxygen around the silicon atoms [ 40 ].…”

Section: Resultsmentioning

confidence: 99%

Porous Lithium Disilicate Glass–Ceramics Prepared by Cold Sintering Process Associated with Post-Annealing Technique

Lyu,

Seo,

Han

et al. 2024

Materials

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Using melt-derived LD glass powders and 5–20 M NaOH solutions, porous lithium disilicate (Li2Si2O5, LD) glass–ceramics were prepared by the cold sintering process (CSP) associated with the post-annealing technique. In this novel technique, H2O vapor originating from condensation reactions between residual Si–OH groups in cold-sintered LD glasses played the role of a foaming agent. With the increasing concentration of NaOH solutions, many more residual Si–OH groups appeared, and then rising trends in number as well as size were found for spherical pores formed in the resultant porous LD glass–ceramics. Correspondingly, the total porosities and average pore sizes varied from 25.6 ± 1.3% to 48.6 ± 1.9% and from 1.89 ± 0.68 μm to 13.40 ± 10.27 μm, respectively. Meanwhile, both the volume fractions and average aspect ratios of precipitated LD crystals within their pore walls presented progressively increasing tendencies, ranging from 55.75% to 76.85% and from 4.18 to 6.53, respectively. Young’s modulus and the hardness of pore walls for resultant porous LD glass–ceramics presented remarkable enhancement from 56.9 ± 2.5 GPa to 79.1 ± 2.1 GPa and from 4.6 ± 0.9 GPa to 8.1 ± 0.8 GPa, whereas their biaxial flexural strengths dropped from 152.0 ± 6.8 MPa to 77.4 ± 5.4 MPa. Using H2O vapor as a foaming agent, this work reveals that CSP associated with the post-annealing technique is a feasible and eco-friendly methodology by which to prepare porous glass–ceramics.

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Section: Resultsmentioning

confidence: 99%

Porous Lithium Disilicate Glass–Ceramics Prepared by Cold Sintering Process Associated with Post-Annealing Technique

Lyu,

Seo,

Han

et al. 2024

Materials

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“…The content of K + is the highest at the surface of the glass, which is attributed to the large K + concentration gradient between glass surface and molten salt, and minor obstruction of the glass network, making exchanges of K + and Na + relatively convenient. With treatment time protracting, K + migrates to the inside of glass, blocking the ion‐exchange channels, difficulties of diffusion continue to enhance, so the amount of K + drops inside the glass 25,26 . Conversely, the concentration of Na + at the surface is comparatively low, multiplies with depth increasing, and finally tends to be stable.…”

Section: Resultsmentioning

confidence: 99%

“…With treatment time protracting, K + migrates to the inside of glass, blocking the ion-exchange channels, difficulties of diffusion continue to enhance, so the amount of K + drops inside the glass. 25,26 Conversely, the concentration of Na + at the surface is comparatively low, multiplies with depth increasing, and finally tends to be stable. At equilibrium, it should be equivalent to the Na + ion concentration in the parent glass.…”

Section: 12mentioning

confidence: 99%

Enhancing bending performance of ultrathin flexible glass through chemical strengthening

Mao,

Yuan,

Guo

et al. 2024

Int J of Appl Glass Sci

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Flexible glass with high bending strength is a remarkable component of flexible electronic displays. However, as a brittle material, its bending properties often do not meet requirements of application. To address this challenge, the application of chemical strengthening stands out as a viable approach to significantly bolster scratch resistance and bending strength in flexible glass. This study focuses on a conventional one‐step chemical strengthening method, employing molten potassium nitrate, to reinforce ultrathin aluminosilicate glass produced through the secondary down‐drawing thermoforming process. Effects of ion‐exchange temperature and time on mechanical properties of strengthened 110 µm flexible glass were investigated, and moreover, properties of strengthened ultrathin flexible glass with various thicknesses were compared. The results indicate that, after chemical strengthening at 380°C for 1 h, the compressive stress (CS) of 110 µm glass reaches 864.60 MPa, and the depth of layer is 15.86 µm, at which time the glass has the best bending performance and scratch resistance, and half of the faceplate spacing during glass breakage can be enhanced from 38.02 ± 2.7 to 8.40 ± 0.62 mm. For ultrathin flexible glass from 40 to 110 µm, after treatment at 380°C for 1 h, the CS of thick glass is higher than that of thin glass, and the enhancement of bending performance is better.

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Improved mechanical performance and forming accuracy of fluorapatite glass-ceramics manufactured using vat photopolymerization with the addition of zirconia

Wang

Shen

et al. 2023

Additive Manufacturing

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Microstructure, cytocompatibility, and chemical durability of chemically strengthened LAS (Li2O-Al2O3-SiO2) glass-ceramic materials

Cited by 18 publications

References 34 publications

Porous Lithium Disilicate Glass–Ceramics Prepared by Cold Sintering Process Associated with Post-Annealing Technique

Porous Lithium Disilicate Glass–Ceramics Prepared by Cold Sintering Process Associated with Post-Annealing Technique

Enhancing bending performance of ultrathin flexible glass through chemical strengthening

Improved mechanical performance and forming accuracy of fluorapatite glass-ceramics manufactured using vat photopolymerization with the addition of zirconia

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