• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>CERAMICS INTERNATIONAL >Quantitative phase analyses of biomedical pyrophosphate-bearing monetite and brushite cements by solid-state NMR and powder XRD
【24h】

Quantitative phase analyses of biomedical pyrophosphate-bearing monetite and brushite cements by solid-state NMR and powder XRD

机译：固态NMR和粉末XRD的含生物医学焦磷酸硅酸盐和石棉水泥的定量相分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present a comprehensive composition analysis of calcium phosphate cements (CPCs) incorporating increasing amounts of bioactive pyrophosphate species (up to 17 wt% P2O7). These cements comprise primarily poorly ordered monetite (CaHPO4) or brushite (CaHPO4 center dot 2H(2)O) and are investigated for enhanced osteoinductive bone/tooth implants. The specimens were characterized by magic-angle spinning (MAS) P-31 and H-1 nuclear magnetic resonance (NMR) spectroscopy along with powder X-ray diffraction (PXRD). P-31 MAS NMR was employed to quantify the major monetite/brushite constituents, the crystalline and amorphous pyrophosphates, as well as various minor orthophosphate by-products. The NMR-derived contents of the crystalline phases accorded well with those from Rietveld analyses of the corresponding PXRD data. The amounts of crystalline and amorphous pyrophosphate depended on the precise cement precursor mixture and preparation conditions, which together with their distinct structural roles may enable the design of cements with a tunable P2O74 - release into aqueous solutions.
机译：我们呈现了含有增加量的生物活性焦磷酸盐物质（最多17wt％P2O7）的磷酸钙水泥（CPC）的综合组成分析。这些水泥主要包含令人遗憾的碳酸盐（CaHPO 4）或黑铅锌（CaHPO4中心点2H（2）o），并研究增强的骨诱导骨/牙植入物。通过魔法角纺丝（MAS）P-31和H-1核磁共振（NMR）光谱以及粉末X射线衍射（PXRD）的表征样本。使用P-31 MAS NMR来定量主要的碳酸盐/石笔成分，结晶和无定形焦磷酸盐，以及各种轻质磷酸盐的副产物。结晶相的NMR衍生的含量与来自相应的PXRD数据的Rietveld分析的那些吻合良好。结晶和无定形焦磷酸磷酸的量依赖于精确的水泥前体混合物和制备条件，其与其不同的结构作用一起可以使细胞设计用可调谐的P2O74 - 释放到水溶液中。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号