New insights into the crystallization process of sol-gel–derived 45S5 bioactive glass

Nawaz Q, de Pablos-Martín A, Martins de Souza e Silva J, Hurle K, Jaimes AT, Brauer DS, Boccaccini AR (2020)


Publication Type: Journal article

Publication year: 2020

Journal

DOI: 10.1111/jace.17124

Abstract

In this work the influence of thermal treatment conditions was evaluated in a sol-gel-derived 45S5 bioactive glass using DSC, XRD, TEM, EDX, and X-ray nanocomputed tomography (nano-CT). Temperature and time of the thermal treatment strongly influence the composition of the crystalline phases. At the onset of the glass transition temperature (600°C), combeite crystallizes as the main phase along with a calcium silicate-phosphate phase, which decomposes into rhenanite from 2 hours of thermal treatment at this temperature. At the crystallization temperature (700°C), combeite remains as the main crystalline phase. Additionally, Na2Ca2Si2O7 crystalline phase is formed. Our results provide a basic platform for tailoring the crystalline phases by controlling the nucleation and growth of crystalline phases via thermal treatments. Different morphologies (round particles, stacked layers, toothpick-like, and long features) were discerned by TEM as a function of temperature and time of treatment. It is the first time that bioactive glass is investigated by X-ray nanocomputed tomography (nano-CT) at laboratory scale. This novel technique enables the 3D visualization of features in the nanometer range, giving a suggestion of the distribution in the sample of the parts composing the sample.

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APA:

Nawaz, Q., de Pablos-Martín, A., Martins de Souza e Silva, J., Hurle, K., Jaimes, A.T., Brauer, D.S., & Boccaccini, A.R. (2020). New insights into the crystallization process of sol-gel–derived 45S5 bioactive glass. Journal of the American Ceramic Society. https://doi.org/10.1111/jace.17124

MLA:

Nawaz, Qaisar, et al. "New insights into the crystallization process of sol-gel–derived 45S5 bioactive glass." Journal of the American Ceramic Society (2020).

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