Publisher DOI: 10.1016/j.jeurceramsoc.2015.06.003
Title: High temperature behavior of monodisperse porosity in alumina films
Language: English
Authors: Pasquarelli, Robert M. 
Rosário, Jefferson J. do 
Rath, Lars 
Schneider, Gerold A. 
Janßen, Rolf 
Keywords: Alumina;Pore/porosity;Porous materials;Sintering
Issue Date: 10-Jul-2015
Publisher: Elsevier Science
Source: Journal of the European Ceramic Society 14 (35): 3917-3926 (2015)
Journal or Series Name: Journal of the European Ceramic Society 
Abstract (english): Understanding the sintering behavior of tailored porosity in thin-film ceramics is essential for applications in photonics, thermal coatings, catalysis, and electrodes. Alumina films exhibiting a random distribution of templated pores with monodisperse size were produced by spin coating from suspensions of alumina powder and polystyrene microspheres. The microstructural evolution, grain size, pore size, and their respective distributions were determined as a function of the initial volume fraction of templated pores, sintering temperature, and time. The behavior between grains and pores at the surface and in the bulk was evaluated and compared to other disordered and ordered porous alumina systems. Above a pore fraction threshold of ~9 vol%, increasing pore fractions retarded grain growth, with smaller grains observed between close pores. While the average bulk pore size did not change with sintering temperature, time, or pore fraction, it did produce a broader pore size distribution with different pore geometries.
ISSN: 0955-2219
Institute: Keramische Hochleistungswerkstoffe M-9 
Type: (wissenschaftlicher) Artikel
Funded by: Financial support from the German Research Foundation (DFG) via SFB 986 “M3“, projects C4 and C5.
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