NDLI: Preparation of porous alumina ceramic with ultra-high porosity and long straight pores by freeze casting

Content Provider	Springer Nature Link
Author	Li, Duanyang Li, Meishuan
Copyright Year	2011
Abstract	Porous alumina ceramic was prepared by freeze casting method using tert-butyl alcohol as the solvent. The as–prepared porous alumina ceramic possessed long straight porous structure. The non-dendrite pore feature was quite distinguished from that prepared based on common solvents such as water and camphene. The porosity of the ceramic could be regulated through the solid loading. When the solid loading in the slurry was 20 vol%, the porosity of the alumina ceramic was 65%. With decreasing the solid loading, the porosity of the alumina ceramic increased linearly. The relationship between the total porosity (P) and initial solid loading (X) can be expressed as P = 98.8−1.7X. The ultra-high porosity of 82% could be achieved when the solid loading was 10 vol%. Moreover, the density of the porous alumina ceramic with the porosity of 82% was even lower than water’s. The compressive strength of the porous alumina ceramic with the porosity of 63 and 82% was determined to be 37.0 and 2.6 MPa, respectively.
Starting Page	345
Ending Page	349
Page Count	5
File Format	PDF
ISSN	13802224
Journal	Journal of Porous Materials
Volume Number	19
Issue Number	3
e-ISSN	15734854
Language	English
Publisher	Springer US
Publisher Date	2011-06-17
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Porosity Al$_{2}$O$_{3}$ Freeze casting Porous ceramic Tert-butyl alcohol Characterization and Evaluation of Materials Catalysis Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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