Insights into the mechanism and kinetics of dissolution of aluminoborosilicate glasses in acidic media: Impact of high ionic field strength cations

Qin, Qianhui; Stone-Weiss, Nicholas; Zhao, Tongyao; Mukherjee, Pinaki; Ren, Jinjun; Mauro, John C.; Goel, Ashutosh

doi:10.1016/j.actamat.2022.118468

Cited by 9 publications

(3 citation statements)

References 156 publications

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“…If we generalize Ca 2+ as a high field strength cation (in league with La 3+ , Zr 4+ , Nb 5+ , etc. ), one should expect a decrease in N 4 fraction with the addition of CaO to the glasses in Ca-x series, as has been reported by Qin et al [75] In the present study, the glass Ca-0 is metaluminous [(Na+Ca)/Al =1] in nature. Therefore, we do not expect any BO 4 units in the glass structure as Na + is entirely consumed by charge compensating the AlO 4 units.…”

Section: Implications Of the Study On Our Understanding Of The Struct...supporting

confidence: 83%

“…Further, in terms of mixing/de-mixing of network-forming moieties with the introduction of Ca 2+ to the investigated glass systems, though it is challenging to zero down on the exact reason for the trends observed in D-HMQC NMR studies, based on the results of 1D MAS NMR spectroscopy, MD simulations, and literature [81][82][83], it can be hypothesized that the following structural descriptors play an essential role in dictating the observed trends: (1) Na/Al and R; (2) the ionic field strength of Ca 2+ ; (3) which cation -Na + or Ca 2+ -is charge-compensating AlO 4 − units. The abovementioned structural descriptors will be instrumental in deciding the (1) short-range ordering in the glass structure, i.e., silicate, borate, and aluminate speciation, (2) concentration and stabilization of Al-O-Al linkages [68], (3) concentration of ring/non-ring BO 3 units and their connectivity with SiO 4 or BO 4 units [75], and (4) chemical environment around the aluminosilicate network, thus, defining the mixing/de-mixing of network forming units in the glass structure.…”

Section: Implications Of the Study On Our Understanding Of The Struct...mentioning

confidence: 99%

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Decoding Crystallization Behavior of Aluminoborosilicate Glasses: From Structural Descriptors to Quantitative Structure – Property Relationship (Qspr) Based Predictive Models

Zhang

Bertani

Pedone

et al. 2023

Preprint

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Section: Implications Of the Study On Our Understanding Of The Struct...supporting

confidence: 83%

Section: Implications Of the Study On Our Understanding Of The Struct...mentioning

confidence: 99%

Decoding Crystallization Behavior of Aluminoborosilicate Glasses: From Structural Descriptors to Quantitative Structure – Property Relationship (Qspr) Based Predictive Models

Zhang

Bertani

Pedone

et al. 2023

Preprint

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“…The ionic field strength (F) represents the force acting on oxygen at a distance of rc (rc = ri + r0, ri is the cation ionic radius and r0 is the oxygen ionic radius) from the cation of each added element. It was determined using the equation F = Zi/rc 2 (Zi is the ionic charge), and the various properties of each element were predicted to contribute to the changes in the glass properties [23,24]. Figure 2 shows the measurement results of the density and dielectric constant of LAS and RLAS glass samples.…”

Section: Resultsmentioning

confidence: 99%

Enhancing the Plasma-Resistance Properties of Li2O–Al2O3–SiO2 Glasses for the Semiconductor Etch Process via Alkaline Earth Oxide Incorporation

Kim¹,

Lee²,

Jun³

et al. 2023

Materials

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To develop plasma-resistant glass materials suitable for semiconductor etching processes, we introduced alkaline earth oxides (ROs) into a Li2O–Al2O3–SiO2 (LAS) glass. Analysis of glass properties with respect to the additives revealed that among the analyzed materials, the LAS material in which Li2O was partially replaced by MgO (MLAS) exhibited the most favorable characteristics, including a low dielectric constant (6.3) and thermal expansion coefficient (2.302 × 10−6/°C). The high performance of MLAS is attributed to the high ionic field strength of Mg2+ ions, which restricts the movement of Li+ ions under the influence of electric fields and thermal vibrations at elevated temperatures. When exposed to CF4/O2/Ar plasma, the etching speed of RO-doped glasses decreased compared with that of quartz and LAS glass, primarily owing to the generation of a high-sublimation-point fluoride layer on the surface. Herein, MLAS demonstrated the slowest etching speed, indicating exceptional plasma resistance. X-ray photoelectron spectroscopy analysis conducted immediately after plasma etching revealed that the oxidation-to-fluorination ratio of Li was the lowest for MLAS. This observation suggests that the presence of Mg2+ ions in the plasma discharge inhibits the migration of Li+ ions toward the surface, thereby contributing to the excellent plasma resistance of MLAS.

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Dissolution of Bioactive Glass S53P4 in Continuous Flows of Tris Buffer and Lactic Acid

Siekkinen,

Engblom,

Karlström

et al. 2023

Biomedical Materials & Devices

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In vitro dynamic dissolution of bioactive glass S53P4 particles was studied in a cascade of three reactors. Tris buffer (pH 7.40) and lactic acid (pH 2.00) with flow rates of 0.2 and 0.04 ml/min were fed through the reactors for 24 h. The increased ion concentrations in Tris inflows to the second and third reactors decreased the dissolution of the particles. However, the normalised surface-specific mass loss rate decreased from the first to the third reactor and with decreasing flow rate. No distinct differences were observed in the reaction layers on the particles in the three consecutive reactors. This implied that the ions released in the previous reactors contributed to the reaction layers formed in the following reactors. Highly incongruent dissolution with similar dissolution rates of sodium, calcium, and phosphorus occurred with the two flow rates in lactic acid. Although a thick silica-rich layer formed on the particles, the low pH prevented calcium phosphate layer precipitation. The results imply that S53P4 particles in an implant react at different rates depending on their location but form similar reaction layer morphologies independent of their location in physiological solutions (pH 7.4). On the other hand, S53P4 particles exposed to acidic solutions with a pH < 5 likely dissolve incongruently, leaving a slowly dissolving Si-rich layer. In such an environment, the dissolution rates of Na, Ca, and P are independent of the location of the S53P4 particle in the implant. Thus, the pH and fluid flow are critical factors for the dissolution of S53P4 bioactive glass particles.

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Insights into the mechanism and kinetics of dissolution of aluminoborosilicate glasses in acidic media: Impact of high ionic field strength cations

Cited by 9 publications

References 156 publications

Decoding Crystallization Behavior of Aluminoborosilicate Glasses: From Structural Descriptors to Quantitative Structure – Property Relationship (Qspr) Based Predictive Models

Decoding Crystallization Behavior of Aluminoborosilicate Glasses: From Structural Descriptors to Quantitative Structure – Property Relationship (Qspr) Based Predictive Models

Enhancing the Plasma-Resistance Properties of Li2O–Al2O3–SiO2 Glasses for the Semiconductor Etch Process via Alkaline Earth Oxide Incorporation

Dissolution of Bioactive Glass S53P4 in Continuous Flows of Tris Buffer and Lactic Acid

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