Processing routes to macroporous ceramics: A review
Processing routes to macroporous ceramics: A review
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DOI：
10.1111/j.1551-2916.2006.01044.x
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发表时间：
2006-06-01
影响因子：
3.9
通讯作者：
Gauckler, Ludwig J.
中科院分区：
文献类型：
--
作者：
Studart, Andre R.;Gonzenbach, Urs T.;Gauckler, Ludwig J.
孔径从400纳米到4毫米，孔隙率在20%-97%之间的大孔陶瓷已经被生产用于许多成熟和新兴的应用，如熔融金属过滤，催化，耐火材料绝缘和热气体过滤。这些应用利用了通过在固体陶瓷中掺入大孔而获得的独特性能。本文综述了可用于制备具有定制结构和化学成分的大孔陶瓷的主要工艺路线。重点是通用和简单的方法，允许一个人控制的微观结构特征，最终决定大孔材料的性质。从微观结构和可实现的机械性能方面描述和比较了复制、牺牲模板和直接发泡技术。最后，对今后大孔陶瓷的研究方向进行了展望。
Macroporous ceramics with pore sizes from 400 nm to 4 mm and porosity within the range 20%-97% have been produced for a number of well-established and emerging applications, such as molten metal filtration, catalysis, refractory insulation, and hot gas filtration. These applications take advantage of the unique properties achieved through the incorporation of macropores into solid ceramics. In this article, we review the main processing routes that can be used for the fabrication of macroporous ceramics with tailored microstructure and chemical composition. Emphasis is given to versatile and simple approaches that allow one to control the microstructural features that ultimately determine the properties of the macroporous material. Replica, sacrificial template, and direct foaming techniques are described and compared in terms of microstructures and mechanical properties that can be achieved. Finally, directions to future investigations on the processing of macroporous ceramics are proposed.