The majority of the literature on glass corrosion focuses understanding dissolution kinetics and mechanisms silicate chemistries in neutral-to-alkaline aqueous regime owing to its relevance fields nuclear waste immobilization biomaterials. However, silicate-based over a broad composition space acidic pH is essential for packaging touch screen electronic display industries. A thorough review this topic reveals only handful studies that discuss acid glasses their derivatives-these include...

In this work, bulk Czochralski-grown single crystals of 10 mol. % Al2O3 alloyed B-Ga2O3 - monoclinic 10% AGO or B-(Al0.1Ga0.9)2O3 are obtained, which show +0.20 eV increase in the bandgap compared with unintentionally doped B-Ga2O3. Further, growths 33% B-(Al0.33Ga0.67)2O3 and 50% B-(Al0.5Ga0.5)2O3 B-AlGaO3 produce polycrystalline single-phase material (B-AGO). All three compositions investigated by x-ray diffraction, Raman spectroscopy, optical absorption, 27Al nuclear magnetic resonance...

Abstract Borates and borosilicates are potential candidates for the design development of glass formulations with important industrial technological applications. A major challenge that retards pace borate/borosilicate based glasses using predictive modeling is lack reliable computational models to predict structure‐property relationships in these over a wide compositional space. hindrance this pursuit has been complexity boron‐oxygen bonding due which it difficult develop adequate B–O...

Fluorine incorporation into silicate glasses is important for technical fields as diverse geophysics, extractive metallurgy, reconstructive dentistry, optical devices, and radioactive waste management. In this study, we explored the structural role of fluorine in alkaline alumino-borosilicate glass, with increasing amounts up to 25 mol % F while maintaining glass composition. Glasses were characterized by X-ray diffraction (XRD), 27Al 19F magic angle spinning nuclear magnetic resonance (MAS...

Transitioning beyond a trial-and-error based approach for the compositional design of next-generation borosilicate-based bioactive glasses requires fundamental understanding underlying and structural drivers controlling their degradation ion release in vitro vivo. Accordingly, present work combines magic-angle spinning (MAS) NMR techniques, MD simulations, DFT calculations on GIPAW PAW algorithms, to build comprehensive model describing short-to-medium-range structure potentially...

Owing to their fast but tunable degradation kinetics (in comparison silicates) and excellent bioactivity, the past decade has witnessed an upsurge in research interest of borate/borosilicate-based bioactive glasses for potential use a wide range soft tissue regeneration applications. Nevertheless, most these have been developed using trial-and-error approaches wherein SiO2 gradually replaced by B2O3. One major reason this empirical approach is complexity short-to-intermediate structures...

Borosilicate glass dissolution behavior in Tris-based buffer solutions was observed to be unimpacted by the acid identity, have an optimal Tris concentration of ∼0.1 M, and form Tris–boron complexes with temperature-dependent stability.

The overarching goal of the present multiscale investigation is to unearth kinetics and mechanisms corrosion borosilicate glasses in hyper-alkaline (pH = 13) environments as a function their chemical composition. Accordingly, series 3- 6-component have been designed starting from Na2O–B2O3–SiO2 ternary, wherein compositional complexity has added systematic tiered approach, finally resulting composition well-known international simple glass (ISG). Tetramethylammonium hydroxide (TMAH), one...

This paper presents an insight into the structural rearrangements induced by Fe2O3 and P2O5 in glasses designed Na2O–Al2O3–B2O3–SiO2 quaternary system. A suite of state-of-the-art characterization techniques, including magic angle spinning-nuclear magnetic resonance (MAS NMR) (on both iron-free iron-containing glasses), Raman, Mössbauer spectroscopies, have been employed to study evolution as a function Fe2O3/Al2O3 ratio content over broad composition space. It has shown that while tends...

• Bauxite residue accumulation is ongoing environmental remediation problem Low temperature process may facilitate conversion of desilication product minerals Resulting amorphous materials exhibit similar structure and properties to allophane Water sorption proto-clay aluminosilicates be useful as soil builder Highly alkaline wastes known bauxite are the abundant byproducts refining into alumina through Bayer process, worldwide estimates these stockpiles exceed 3 billion tons, with hundreds...

Abstract One major factor impeding the design of nuclear waste glasses with enhanced loadings is our insufficient understanding their composition–structure–durability relationships, specifically in environments form expected to encounter a geological repository. In particular, high field‐strength cations (HFSCs) are an integral component most streams. However, impact on long‐term performance glassy remains mostly undeciphered. this context, present study aims understand some HFSCs (i.e., Nb...

Achieving thinner and higher performance display/substrate glasses transparent glass-ceramics with tunable properties requires a precise control of acid-etching process, thus necessitating comprehensive understanding glass composition–structure–dissolution behavior relationships in acidic medium. Unfortunately, the literature on this subject has been focused only narrow set chemistries. Therefore, consensus mechanisms that govern dissolution multicomponent silicate over broad compositional...

Borosilicate compositions were designed to explore effects of a fixed amount Cr, as Cr2O3 or Na2CrO4, and the impact Al2O3, on sulfur solubility by progressively adding elemental S. The series with Al2O3 has higher SO3 ~3.5 mol% while without ~2 mol%. Crystalline formed only when both present. At highest S addition, salt phase always forms, identified Na2(S,Cr)O4 via spectroscopy, diffraction, thermal analysis. Magnetic resonance no change in B coordination either is added, suggesting that...