Phase-inversion tape casting and synchrotron-radiation computed tomography analysis of porous alumina

Hong Fang, Chunlei Ren, Yaoge Liu, Detang Lu, Aloysius J.A. Winnubst, Chusheng Chen

Research output: Contribution to journalArticleAcademicpeer-review

21 Citations (Scopus)

Abstract

A variant of tape casting based on the phase inversion phenomenon was adopted for fabrication of porous ceramic wafer. A slurry was prepared by dispersing alumina powder in an N-methyl-2-pyrrolidone (NMP) solution of the polymers polyethersulfone (PES) and polyvinylpyrrolidone (PVP). The slurry was cast using a doctor blade, and immersed in water to solidify the polymer solution via phase inversion. The green tape was dried and sintered at 1500 ◦C. The as-prepared ceramic wafer was characterized using synchrotron-radiation computed tomography (SR-CT). It was revealed that the ceramic wafer contained typical finger-like macrovoids, and the porosity resulting from these macrovoids was ∼30%. The overall porosity of the wafer was 59%, as derived from the density data measured by Archimedes method in mercury. It is concluded that the phase inversion tape casting is a simple and effective method for preparation of porous ceramics.
Original languageEnglish
Pages (from-to)2049-2051
JournalJournal of the European Ceramic Society
Volume33
Issue number10
DOIs
Publication statusPublished - 2013

Keywords

  • IR-87829
  • METIS-296805

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