Impact of MnO on the structural, physicochemical, and dissolution properties of phosphate-based glasses

Sofiane El Barkaoui, Abdelaziz El Abiad, I. Anasser, M. A. Harech, H. Aouad, M. Mesnaoui, T. Labbilta
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Abstract

In this work, manganese was suggested to improve the durability of 50P2O5–33·33K2O–(11·11−x/2) CaO−(5·56−x/2) MgO –xMnO glasses with 0≤x≤ 2 mol%. Indeed, its effect on the glass structure, thermal properties, physicochemical properties, and in particular, dissolution behaviours have been studied. The conventional melt-quenching technique was used to produce glasses at 1000°C and they were characterised by differential thermal analysis, density and molar volume measurements, x-ray diffraction, Fourier transform infrared spectroscopy and Raman spectroscopy. Dissolution behaviours were tracked by measuring weight loss and pH. Molar volume measurements showed that phosphate glasses become more compact by incorporating MnO. Structural characterisation using Raman and infrared spectra proved that the glass network is composed mainly of metaphosphate chains. The dissolution results showed that incorporating manganese was an effective method to change the phosphate glasses’ chemical durability due to their ionic crosslinking between the nonbridging oxygen atoms of the phosphate chains, corresponding to the change in thermal properties (Tg, Tc and Tf).
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MnO对磷酸盐基玻璃结构、物理化学和溶解性能的影响
在本研究中,锰可以提高50P2O5-33·33K2O -(11·11−x/2) CaO -(5·56−x/2) MgO - xmno玻璃的耐久性,其质量分数为0≤x≤2 mol%。事实上,它对玻璃结构、热性能、物理化学性能,特别是溶解行为的影响已经被研究过。采用传统的熔融淬火技术在1000℃下生产玻璃,并通过差热分析、密度和摩尔体积测量、x射线衍射、傅里叶变换红外光谱和拉曼光谱对其进行了表征。通过测量失重和ph值来跟踪溶解行为。摩尔体积测量表明,磷酸盐玻璃在加入MnO后变得更加致密。拉曼光谱和红外光谱的结构表征表明,该玻璃网络主要由偏磷酸盐链组成。溶解结果表明,加入锰是改变磷酸盐玻璃化学耐久性的有效方法,因为磷酸盐链的非桥接氧原子之间的离子交联,对应于热性能(Tg, Tc和Tf)的变化。
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来源期刊
CiteScore
0.70
自引率
33.30%
发文量
0
审稿时长
1 months
期刊介绍: Physics and Chemistry of Glasses accepts papers of a more purely scientific interest concerned with glasses and their structure or properties. Thus the subject of a paper will normally determine the journal in which it will be published.
期刊最新文献
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