磷对白云瓷力学和降解性能的影响

被引:3
作者
张志杰
李宇琴
张晨阳
钟明峰
机构
[1] 华南理工大学材料科学与工程学院
基金
广东省科技计划; 广州市科技计划项目;
关键词
磷; 白云瓷; 玻璃相; 力学性能; 降解性能; 31P MAS-NMR;
D O I
暂无
中图分类号
TQ174.1 [基础理论];
学科分类号
0805 ; 080502 ;
摘要
通过磷的引入调控白云瓷显微结构的形成,来提高白云瓷的抗弯强度及降解性能.采用X射线衍射(XRD)Rietveld全谱拟合、拉曼光谱、傅里叶红外光谱(FT-IR)、31P魔角旋转核磁共振光谱(MAS-NMR)和扫描电子显微镜(SEM)等方法对样品的结构及性能进行表征.结果发现:掺P后白云瓷的玻璃相含量明显增加,且在玻璃相中形成了Si(Al)—O—P—O—Ca(Mg)的结构;该玻璃相的变化使得白云瓷粘结更紧密,抗弯强度从24.99 MPa提高到38.73 MPa;在酸性条件下,玻璃相中的P—O键容易水解,且P—O—Mg比P—O—Ca更优先被破坏,这加快了玻璃相的解体,使得白云瓷的降解性大幅提升.
引用
收藏
页码:140 / 146
页数:7
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