Ice-mould freeze casting of porous ceramic components
Ice-mould freeze casting of porous ceramic components
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DOI：
10.1016/j.jeurceramsoc.2007.04.010
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发表时间：
2007-01-01
影响因子：
5.7
通讯作者：
Richter, Hans-Juergen
中科院分区：
文献类型：
--
作者：
Moritz, Tassilo;Richter, Hans-Juergen
采用冷冻铸造技术制备了多孔、中空的陶瓷构件。为此，制备了高固含量的水泥浆，该浆液可稳定地抗冻至至少零下5摄氏度。冰芯是通过在钢件上涂上冰水，然后用陶瓷悬浮液浸渍制成的。通过冷冻干燥去除冰芯和冷冻悬浮液，并进行烧结，可以获得包括钢件在内的具有高开孔率的陶瓷部件。例如，羟基磷灰石被用来展示冷冻铸造技术以及其他技术在骨替代领域的应用机会。采用圆柱形冰模冷冻浇注法制备了致密的羟基磷灰石颗粒，研究了羟基磷灰石浆料的固含量对冰晶生长的影响。(C)2007爱思唯尔有限公司。保留所有权利。
Porous, hollow ceramic components were produced by freeze casting technique. For this purpose aqueous slurries with high solid contents were prepared which were stable against freezing down to at least -5 degrees C. Ice cores were made by coating steel components with freezing water which were subsequently dip-coated with the ceramic suspensions. After freeze drying which removes both, the ice core and the frozen suspension liquid, and sintering, ceramic components with a high amount of open porosity including steel parts could be achieved. As an example hydroxyapatite was used for showing the opportunities of the freeze casting technology among others for applications in the field of bone replacement. The influence of the solid content of the hydroxyapatite slurries on the ice crystal growth has been investigated by means of compact hydroxyapatite bodies which were prepared by freeze casting using ice moulds with cylindrical cavities. (C) 2007 Elsevier Ltd. All rights reserved.