SPS烧结制备生物活性镁黄长石陶瓷

发布时间：2018-06-06 12:03

  本文选题：镁黄长石 + 放电等离子烧结　； 参考：《无机材料学报》2017年08期

【摘要】：钙硅基生物陶瓷具有良好的生物活性和细胞相容性,在生物医疗领域具有广阔的发展前景。但是其粉体烧结性能差的缺点导致很难获得致密的陶瓷材料,阻碍了其应用的进程。本研究采用化学共沉淀法制备了纯度高且烧结活性好的镁黄长石粉体,然后采用放电等离子烧结技术(SPS)制备了镁黄长石陶瓷材料。通过X射线衍射(XRD)和扫描电子显微镜(SEM)表征了样品的组成结构和显微形貌,并通过阿基米德法和模拟体液浸泡法分析了镁黄长石陶瓷样品的致密度和生物活性。研究结果表明,采用SPS技术在1170℃、70 MPa保温5 min条件下可获得致密度超过99%的镁黄长石陶瓷材料。在模拟体液中浸泡3 d,陶瓷样品表面出现磷酸盐的沉积,浸泡7 d后生成了类骨羟基磷灰石,说明SPS技术制备的致密镁黄长石生物陶瓷具有良好的诱导沉积类骨磷灰石能力。
[Abstract]:Calcium-silicon-based bioceramics have good bioactivity and cytocompatibility, and have a broad prospect in the field of biomedicine. However, it is difficult to obtain dense ceramic materials due to its poor sintering performance, which hinders the process of its application. In this study, magnesium-yellow feldspar powders with high purity and good sintering activity were prepared by chemical coprecipitation method, and then magnesium-yellow feldspar ceramics were prepared by spark plasma sintering (SPS) technique. The composition and morphology of the samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The density and bioactivity of the samples were analyzed by Archimedes method and simulated body fluid immersion method. The results show that more than 99% magnesium-yellow feldspar ceramics can be obtained by using SPS technology at 1170 鈩，

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