Thermal and crystallization kinetics of yttrium-doped phosphate-based glasses

Arafat, Abul; Samad, Sabrin A.; Wadge, Matthew D.; Islam, Md Towhidul; Lewis, Andrew L.; Barney, Emma R.; Ahmed, Ifty

Abstract

© 2019 The American Ceramic Society and Wiley Periodicals, Inc Yttrium-doped glasses have been utilized for biomedical applications such as radiotherapy, especially for liver cancer treatment. In this paper, the crystallization behavior of phosphate-based glasses doped with yttrium (in the system 45P2O5–(30 − x) Na2O–25CaO–xY2O3—where x = 0, 1, 3 and 5) have been investigated via Differential Scanning Calorimetry (DSC) using nonisothermal technique at different heating rates (5°C, 10°C, 15°C and 20°C/min). The glass compositions were characterized via EDX, XRD, Density and Molar volume analysis. The Moynihan and Kissinger methods were used for the determination of glass transition activation energy (Eg) which decreased from 192 to 118 kJ/mol (Moynihan) and 183 to 113 kJ/mol (Kissinger) with increasing yttrium oxide content. Incorporation of 0 to 5 mol% Y2O3 revealed an approximate decrease of 71 kJ/mol (Ozawa and Augis) for onset crystallization (Ex) and 26 kJ/mol (Kissinger) for crystallization peak activation energies (Ec). Avrami index (n) value analyzed via Matusita–Sakka equation suggested a one-dimensional crystal growth for the glasses investigated. SEM analysis explored the crystalline morphologies and revealed one-dimensional needle-like crystals. Overall, it was found that these glass formulations remained amorphous with up to 5 mol% Y2O3 addition with further increases in Y2O3 content resulting in significant crystallization.

Citation

Arafat, A., Samad, S. A., Wadge, M. D., Islam, M. T., Lewis, A. L., Barney, E. R., & Ahmed, I. (2020). Thermal and crystallization kinetics of yttrium-doped phosphate-based glasses. International Journal of Applied Glass Science, 11(1), 120-133. https://doi.org/10.1111/ijag.14163

• Journal Article Type: Article
• Acceptance Date: Nov 4, 2019
• Online Publication Date: Nov 27, 2019
• Publication Date: Jan 1, 2020
• Deposit Date: Nov 30, 2020
• Publicly Available Date: Nov 30, 2020
• Journal: International Journal of Applied Glass Science
• Print ISSN: 2041-1286
• Electronic ISSN: 2041-1294
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 11
• Issue: 1
• Pages: 120-133
• DOI: https://doi.org/10.1111/ijag.14163
• Keywords: crystal growth, crystallization kinetics, DSC, yttrium phosphate glass
• Public URL: https://nottingham-repository.worktribe.com/output/5091892
• Publisher URL: https://ceramics.onlinelibrary.wiley.com/doi/10.1111/ijag.14163
• Additional Information: This is the peer reviewed version of the following article: Arafat, A, Samad, SA, Wadge, MD, et al. Thermal and crystallization kinetics of yttrium‐doped phosphate‐based glasses. Int J Appl Glass Sci. 2020; 11: 120– 133. https://doi.org/10.1111/ijag.14163, which has been published in final form at https://doi.org/10.1111/ijag.14163. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.