Porous ceramics mimicking nature - Preparation and properties of microstructures with unidirectionally oriented pores

Kiyoshi Okada, Toshihiro Isobe, Ken Ichi Katsumata, Yoshikazu Kameshima, Akira Nakajima, Kenneth J D MacKenzie

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34 Citations (Scopus)


Porous ceramics with unidirectionally oriented pores have been prepared by various methods such as anodic oxidation, templating using wood, unidirectional solidification, extrusion, etc. The templating method directly replicates the porous microstructure of wood to prepare porous ceramics, whereas the extrusion method mimics the microstructures of tracheids and xylems in trees. These two methods are therefore the main focus of this review as they provide good examples of the preparation of functional porous ceramics with properties replicating nature. The well-oriented cylindrical through-hole pores prepared by the extrusion method using fibers as the pore formers provide excellent permeability together with high mechanical strength. Examples of applications of these porous ceramics are given, including their excellent capillary lift of over 1 m height which could be used to counteract urban heat island phenomena, and other interesting properties arising from anisotropic unidirectional porous structures.

Original languageEnglish
Article number064701
JournalScience and Technology of Advanced Materials
Issue number6
Publication statusPublished - Dec 2011



  • anodic oxidation
  • extrusion process
  • porous ceramics
  • templating
  • unidirectional porous microstructure
  • unidirectional solidification

ASJC Scopus subject areas

  • Materials Science(all)

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