Highly porous α-Al2O3 ceramics obtained by sintering atomic layer deposited inverse opals

Furlan KP, Pasquarelli RM, Krekeler T, Ritter M, Zierold R, Nielsch K, Schneider GA, Janssen R (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Ceramics International Elsevier

Book Volume: 43

Pages Range: 11260-11264

Journal Issue: 14

DOI: 10.1016/j.ceramint.2017.05.176

Abstract

A process for generating highly porous α-Al2O3 ceramics has been developed. In this paper, a combination of self-assembly and atomic layer deposition is demonstrated as a means to fabricate inverse alumina opals, which have their structures transformed via sintering. The resulting highly porous structure is stable even after a 4 h dwell time at 1400 °C, in contrast to structures generated by conventional powder metallurgy, sol-gel or colloidal powder suspension infiltration methods. TEM analysis reveals that the structure consists of single grain domains of up to 3 µm, each containing a randomly interconnected network of alumina ligaments that share a common crystalline orientation, suggesting a different mechanism of grain boundary migration during sintering. These highly porous α-alumina ceramics are considered to be ideal for filtration or catalysis applications.

Involved external institutions

Technische Universität Hamburg-Harburg (TUHH) DE Germany (DE) Universität Hamburg (UHH) DE Germany (DE)

How to cite

APA:

Furlan, K.P., Pasquarelli, R.M., Krekeler, T., Ritter, M., Zierold, R., Nielsch, K.,... Janssen, R. (2017). Highly porous α-Al2O3 ceramics obtained by sintering atomic layer deposited inverse opals. Ceramics International, 43(14), 11260-11264. https://doi.org/10.1016/j.ceramint.2017.05.176

MLA:

Furlan, Kaline P., et al. "Highly porous α-Al2O3 ceramics obtained by sintering atomic layer deposited inverse opals." Ceramics International 43.14 (2017): 11260-11264.

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