本文選題：鎂黃長石 + 放電等離子燒結��； 參考：《無機材料學報》2017年08期

【摘要】：鈣硅基生物陶瓷具有良好的生物活性和細胞相容性,在生物醫(yī)療領域具有廣闊的發(fā)展前景。但是其粉體燒結性能差的缺點導致很難獲得致密的陶瓷材料,阻礙了其應用的進程。本研究采用化學共沉淀法制備了純度高且燒結活性好的鎂黃長石粉體,然后采用放電等離子燒結技術(SPS)制備了鎂黃長石陶瓷材料。通過X射線衍射(XRD)和掃描電子顯微鏡(SEM)表征了樣品的組成結構和顯微形貌,并通過阿基米德法和模擬體液浸泡法分析了鎂黃長石陶瓷樣品的致密度和生物活性。研究結果表明,采用SPS技術在1170℃、70 MPa保溫5 min條件下可獲得致密度超過99%的鎂黃長石陶瓷材料。在模擬體液中浸泡3 d,陶瓷樣品表面出現(xiàn)磷酸鹽的沉積,浸泡7 d后生成了類骨羥基磷灰石,說明SPS技術制備的致密鎂黃長石生物陶瓷具有良好的誘導沉積類骨磷灰石能力。
[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，

本文編號：1986454