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Research Article | Open Access

Synthesis of Al2O3–SiO2–MgO ceramics with hierarchical porous structure

Elena F. KRIVOSHAPKINAa,b, Pavel V. KRIVOSHAPKINa,b, Aleksey A. VEDYAGINc,d( )
Institute of Chemistry of Komi SC UB RAS, Syktyvkar, 167982, Russia
ITMO University, St. Petersburg, 197101, Russia
Boreskov Institute of Catalysis SB RAS, Novosibirsk, 630090, Russia
National Research Tomsk Polytechnic University, Tomsk, 634050, Russia
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Abstract

A series of asymmetric cordierite ceramics with hierarchical porous structure were prepared and characterized. The macroporous support was obtained from natural raw materials (bauxite, silica sand, kaolinite, talc, and alumina) via ceramic technology. The prepared ceramic discs were characterized by a narrow pore size distribution. The average pore size was about 9.5 µm, and the open porosity was estimated to be 30%. Coating the discs with micro/mesoporous cordierite layer was performed using the sol–gel approach. Three-component sols were obtained from organic or inorganic precursors. Corresponding gels were calcined at 1200 ℃ to form the cordierite structure. The nature of precursor was found to affect the pore volume distribution. Narrow pore volume distribution was observed when organic precursors were used. Another key factor to control the parameters of final material was the drying condition. Supercritical drying of the gels has allowed us to increase the surface area in two orders of magnitude comparing with conventional drying procedure.

Keywords

sol–gel methodaerogelscordieriteAl2O3–SiO2–MgOhierarchical porous structure

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Journal of Advanced Ceramics
Volume 6 Issue 1,
March 2017
Pages 11-19
DOI: 10.1007/s40145-016-0210-4
Cite this article:
KRIVOSHAPKINA EF, KRIVOSHAPKIN PV, VEDYAGIN AA. Synthesis of Al2O3–SiO2–MgO ceramics with hierarchical porous structure. Journal of Advanced Ceramics, 2017, 6(1): 11-19. https://doi.org/10.1007/s40145-016-0210-4

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Received: 06 January 2018
Revised: 09 September 2016
Accepted: 10 June 2016
Published: 02 March 2017
© The author(s) 2016

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons. org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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