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首页> 外文期刊>Acta biomaterialia >Biomimetic apatite sintered at very low temperature by spark plasma sintering: physico-chemistry and microstructure aspects.
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Biomimetic apatite sintered at very low temperature by spark plasma sintering: physico-chemistry and microstructure aspects.

机译：仿生磷灰石通过火花等离子体烧结在非常低的温度下烧结：物理化学和微观结构方面。

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摘要

Nanocrystalline apatites analogous to bone mineral are very promising materials for the preparation of highly bioactive ceramics due to their unique intrinsic physico-chemical characteristics. Their surface reactivity is indeed linked to the presence of a metastable hydrated layer on the surface of the nanocrystals. Yet the sintering of such apatites by conventional techniques, at high temperature, strongly alters their physico-chemical characteristics and biological properties, which points out the need for "softer" sintering processes limiting such alterations. In the present work a non-conventional technique, spark plasma sintering, was used to consolidate such nanocrystalline apatites at non-conventional, very low temperatures (T<300 degrees C) so as to preserve the surface hydrated layer present on the nanocrystals. The bioceramics obtained were then thoroughly characterized by way of complementary techniques. In particular, microstructural, nanostructural and other major physico-chemical features were investigated and commented on. This work adds to the current international concern aiming at improving the capacities of present bioceramics, in view of elaborating a new generation of resorbable and highly bioactive ceramics for bone tissue engineering.
机译：类似于骨矿物质的纳米晶磷灰石由于其独特的内在物理化学特性，是制备高生物活性陶瓷的非常有前途的材料。实际上，它们的表面反应性与纳米晶体表面上亚稳水合层的存在有关。然而，通过常规技术在高温下对这种磷灰石的烧结强烈地改变了它们的物理化学特性和生物学特性，这表明需要“较软”的烧结过程来限制这种改变。在本工作中，使用非常规技术（火花等离子体烧结）在非常规的非常低的温度（T <300摄氏度）下固结此类纳米晶磷灰石，以保留存在于纳米晶体上的表面水合层。然后通过补充技术彻底表征获得的生物陶瓷。尤其是对微观结构，纳米结构和其他主要物理化学特征进行了研究和评论。鉴于为骨组织工程开发了新一代可吸收和高生物活性的陶瓷，这项工作增加了当前国际关注的目标，旨在提高目前的生物陶瓷的能力。

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