The influence of gadolinium on the thermal properties of bioactive glasses

Q1 Materials Science

Biomedical Glasses Pub Date : 2019-01-01 DOI:10.1515/bglass-2019-0016

R. Borges, Natália Del Rey Menezes, J. Marchi

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引用次数: 7

Abstract

Abstract Rare Earth (RE)-containing bioactive glasses has recently gained more relevance in the field of biomaterials due to the unique optical, electronic, and chemical properties of the RE elements. In this work, the influence of gadolinium in the thermal properties of bioactive glasses based on the SiO2-Na2O-CaO-P2O5 containing different Na/Ca ratio was studied. The glasses were obtained by melting-quenching, and their properties were evaluated by differential thermal analysis, X-ray diffraction, and scanning electron microscopy. The results evidenced that Gd tends to increase the working temperature (Tc-Tg) in Ca-rich glasses, which leads to a less tendency to devitrification. On the other hand, in Na-rich glasses, Gd did not play an essential role in crystallization, and the thermal properties of Gd-containing Na-rich glasses were similar to their counterparts. In conclusion, we suggested that it is possible to control the influence of Gd in the glass devitrification by changing the Na/Ca ratio in the glass composition. These results may be interesting for further works to which crystallization may be either a desired or undesired phenomena.

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钆对生物活性玻璃热性能的影响

摘要含稀土(RE)生物活性玻璃由于其独特的光学、电子和化学性质，近年来在生物材料领域获得了越来越多的关注。本文研究了钆对不同Na/Ca比的sio2 - na20 - cao - p2o5生物活性玻璃热性能的影响。通过熔融淬火法制备了玻璃，并通过差热分析、x射线衍射和扫描电镜对其性能进行了评价。结果表明，Gd会使富钙玻璃的工作温度(Tc-Tg)升高，从而使玻璃的反玻璃化倾向减小。另一方面，在富na玻璃中，Gd在结晶过程中没有发挥重要作用，含Gd富na玻璃的热性能与同类玻璃相似。综上所述，我们认为可以通过改变玻璃组成中的Na/Ca比来控制Gd对玻璃脱氮的影响。这些结果对于结晶可能是一种期望或不希望的现象的进一步工作可能是有趣的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biomedical Glasses Materials Science-Surfaces, Coatings and Films

自引率

0.00%

发文量

审稿时长

17 weeks

期刊介绍： Biomedical Glasses is an international Open Access-only journal covering the field of glasses for biomedical applications. The scope of the journal covers the science and technology of glasses and glass-based materials intended for applications in medicine and dentistry. It includes: Chemistry, physics, structure, design and characterization of biomedical glasses Surface science and interactions of biomedical glasses with aqueous and biological media Modeling structure and reactivity of biomedical glasses and their interfaces Biocompatibility of biomedical glasses Processing of biomedical glasses to achieve specific forms and functionality Biomedical glass coatings and composites In vitro and in vivo evaluation of biomedical glasses Glasses and glass-ceramics in engineered regeneration of tissues and organs Glass-based devices for medical and dental applications Application of glasses and glass-ceramics in healthcare.