Comparison of low and high pressure infiltration regimes on the density and highly porous microstructure of ceria ecoceramics made from sustainable cork templates
authors Novais, RM; Pullar, RC
nationality International
journal JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
author keywords Cork; Ecoceramics; Ceria; Biomorphic; Porous
keywords WOOD; CERAMICS; OXIDE; TEMPERATURE; BEHAVIOR; WASTE; CEO2
abstract Cork templates were used to produce lightweight bulk biomimetic ecoceramic (environmentally conscious ceramic) monoliths. Bulk/monolithic ceramics are vital for many applications, i.e. energy materials and fuel cells. Using simple and flexible, aqueous green-chemistry procedures, for the first time the influence of infiltration regime, number of infiltration cycles and sintering temperature on ecoceramic density and microstructure was studied. This lightweight three-dimensionally ordered macroporous (3DOM) CeO2 preserved the hexagonal cellular structure of cork, but unlike the wood, the rear cell walls were open, greatly increasing open porosity. Higher sintering temperatures (1600 instead of 1000 degrees C) were required to produce cm size monolithic ecoceramics mechanically strong enough to be handled. The infiltration regime and number of infiltration cycles affected density and porosity. Lower infiltration pressure led to higher porosity ecoceramics (3.3-5.7%), which may favour catalytic performance, showing the possibility of tailoring porosity and specific surface area by modifying the number of infiltration cycles.
publisher ELSEVIER SCI LTD
issn 0955-2219
year published 2019
volume 39
issue 4
beginning page 1287
ending page 1296
digital object identifier (doi) 10.1016/j.jeurceramsoc.2018.11.050
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000457819600075
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 3.794
5 year journal impact factor 3.536
category normalized journal impact factor percentile 98.148
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg