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http://dx.doi.org/10.4150/KPMI.2015.22.6.438

Fabrication of Porous Al2O3 Film by Freeze Tape Casting  

Shin, Ran-Hee (Engineering Ceramic Team, Korea Institute of Ceramic Engineering and Technology)
Koo, Jun-Mo (Engineering Ceramic Team, Korea Institute of Ceramic Engineering and Technology)
Kim, Young-Do (Division of Materials Science and Engineering, Hanyang University)
Han, Yoon-Soo (Engineering Ceramic Team, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of Powder Materials / v.22, no.6, 2015 , pp. 438-442 More about this Journal
Abstract
Porous thick film of alumina which is fabricated by freeze tape casting using a camphene-camphor-acrylate vehicle. Alumina slurry is mixed above the melting point of the camphene-camphor solvent. Upon cooling, the camphene-camphor crystallizes from the solution as particle-free dendrites, with the $Al_2O_3$ powder and acrylate liquid in the interdendritic spaces. Subsequently, the acrylate liquid is solidified by photopolymerization to offer mechanical properties for handling. The microstructure of the porous alumina film is characterized for systems with different cooling rate around the melting temperature of camphor-camphene. The structure of the dendritic porosity is compared as a function of ratio of camphene-camphor solvent and acrylate content, and $Al_2O_3$ powder volume fraction in acrylate in terms of the dendrite arm width.
Keywords
Porous; Freeze tape casting; Camphene; Camphor; Photopolymerization;
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