An X-ray absorption spectroscopy study of the local environment of iron in degradable iron-phosphate glasses

Qiu D; Moss RM; Pickup DM; Ahmed I; Knowles JC; Newport RJ

首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >An X-ray absorption spectroscopy study of the local environment of iron in degradable iron-phosphate glasses

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An X-ray absorption spectroscopy study of the local environment of iron in degradable iron-phosphate glasses

机译：X射线吸收光谱法研究可降解磷酸铁玻璃中铁的局部环境

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Degradable iron-phosphate glasses with the composition of (CaO)(0.30)-(Na2O)(0.20-x)-(Fe2O3)(x)-(P2O5)(0.50), x = 0.01-0.05, were studied by Fe K-edge X-ray absorption spectroscopy (both near-edge, XANES, and extended, EXAFS). The addition of up to 5 mol% iron oxide is known to enhance the durability of the phosphate glass while maintaining biocompatibility. The results from the two techniques used here both show that iron is in the Fe(III) oxidation state and has octahedral coordination. This suggests that Fe is cross-linking the phosphate chains and therefore strengthening the network structure, resulting improved chemical durability of the glasses.

机译：用Fe K研究了组成为（CaO）（0.30）-（Na2O）（0.20-x）-（Fe2O3）（x）-（P2O5）（0.50），x = 0.01-0.05的可降解磷酸铁玻璃。边缘X射线吸收光谱（近边缘XANES和扩展EXAFS）。已知添加至多5mol％的氧化铁可增强磷酸盐玻璃的耐久性，同时保持生物相容性。此处使用的两种技术的结果均表明铁处于Fe（III）氧化态并具有八面体配位。这表明Fe正在交联磷酸酯链，因此加强了网络结构，从而提高了玻璃的化学耐久性。

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《Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites》 |2008年第54期|共5页
作者
Qiu D; Moss RM; Pickup DM; Ahmed I; Knowles JC; Newport RJ;
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正文语种 eng
中图分类 549LB002;
关键词
Biomedical glass; Phosphates; X-ray absorption;

机译：生物医用玻璃;磷酸盐;X射线吸收;

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1. An X-ray absorption spectroscopy study of the local environment of iron in degradable iron-phosphate glasses [J] . Qiu D, Moss RM, Pickup DM, Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites . 2008,第52a54期

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An X-ray absorption spectroscopy study of the local environment of iron in degradable iron-phosphate glasses

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