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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Glass-ceramic foams and reticulated scaffolds by sinter-crystallization of a hardystonite glass
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Glass-ceramic foams and reticulated scaffolds by sinter-crystallization of a hardystonite glass

机译：通过烧结结晶玻璃陶瓷泡沫和特殊的支架玻璃结晶

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摘要

In the present investigation, we focused on a glass-based route to hardystonite ceramics, which represent one of the most promising classes of biomaterials, in the form of highly porous scaffolds. A glass corresponding to the stoichiometry of a hardystonite solid solution (Ca(2)ZN(0.85)MS(0.15)Si(2)o(7)) was first synthesized and reduced in the form of fine powders (<40 pm). Highly crystallized samples were obtained by sinter-crystallization, in air, at 1000-1200 degrees C, starting from highly porous green bodies (porosity >70 vol%), obtained by direct foaming or stereolithography of specifically formulated suspensions. More precisely, foams were obtained by intensive mechanical stirring (with the help of a surfactant) of suspensions undergoing gelation, in weakly alkaline aqueous solutions. Reticulated structures with complex non-stochastic geometry, on the other hand, were obtained by digital light processing of glass powders suspended in a photosensitive organic binder. The intensive crystallization caused an excellent retention of the shapes generated at room temperature. The uniform microstructures, all comprising quite dense struts, favored the mechanical properties (with crushing strength well exceeding 2 MPa, with open porosity above 65 vol%).
机译：在目前的调查中，我们专注于玻璃途径到Hardystonite陶瓷，其代表了最有前途的生物材料类别，以高度多孔的支架。对应于硬质硅酸根固溶体的化学计量（Ca（2）Zn（0.85）MS（0.15）Si（2）O（2）O（7））的玻璃首先合成并以细粉末（<40μm）的形式还原。通过从高度多孔的生坯（孔隙率> 70Vol％）开始，通过直接配制悬浮液的直接发泡或立体化学获得，通过在1000-1200℃下，在1000-1200c℃下的烧结结晶获得高度结晶的样品。更精确地，在弱碱性水溶液中，通过强化机械搅拌（借助于表面活性剂的表面活性剂）获得泡沫，在弱碱性水溶液中得到粘附的悬浮液。另一方面，具有复杂非随机几何形状的网状结构通过悬浮在光敏有机粘合剂中的玻璃粉末的数字光处理获得。强化结晶引起了在室温下产生的形状的优异保留。均匀的微观结构，均包含相当密集的支柱，有利于机械性能（具有碎强度超过2MPa的强度，开孔高于65体积％）。

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