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标题：Silicon substituted hydroxyapatite: Preparation with Solid-State Reaction, Characterization and Dissolution Properties
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作者：M. Jamil ; B. Elouatli ; H. Khallok 等
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2018
卷号：9
期号：8
页码：2322-2327
出版社：University of Mohammed Premier Oujda
摘要：Silicon substituted hydroxyapatite (Ca10(PO4)5.5(SiO4)0.5(OH)1.5; Si-HAP) andunsubstituted hydroxyapatite (Ca10(PO4)6(OH)2; HAP) are prepared by solid-solidreaction at 1100°C from intimate mixtures of tricalcium phosphate (β-Ca3(PO4)2),calcium carbonate (CaCO3) with or without silicon dioxide (SiO2). The preparedceramics were characterized by Fourier Transform Infrared spectroscopy (FTIR) and XrayDiffraction (XRD). There dissolution was carried out in a buffer solution (pH = 4.8)at 37°C. From the analysis of the XRD patterns, HAP and Si-HAP, have been identifiedas single phase. The results of FTIR and the structural refinement show and confirm theincorporation of the silicate ion in the HAP structure. The substitution of PO43- bySiO44- groups causes a reduction of the hydroxyl groups and increase the latticedistortion index (Dind = 4.682 ) compared to the pure HAP value (Dind =4.156) and thetheoretical HAP value (Dind = 3.079). This structural change increases the dissolution ofHAP which would lead to an improvement of its biological activity.
关键词：Bioceramics;Hydroxyapatite;Silicon;Solid;state reaction;Dissolution;