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

Elena F. Krivoshapkina, Pavel V. Krivoshapkin, Aleksey A. Vedyagin

Research output: Contribution to journalArticle

8 Citations (Scopus)

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 °C 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.

Original languageEnglish
Pages (from-to)11-19
Number of pages9
JournalJournal of Advanced Ceramics
Volume6
Issue number1
DOIs
Publication statusPublished - 1 Mar 2017

Fingerprint

Drying
Aluminum Oxide
Pore size
Gels
Talc
Kaolin
Silica sand
Kaolinite
Polymethyl Methacrylate
Sols
Raw materials
Alumina
Porosity
Coatings
cordierite

Keywords

  • aerogels
  • AlO–SiO–MgO
  • cordierite
  • hierarchical porous structure
  • sol–gel method

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Synthesis of Al2O3–SiO2–MgO ceramics with hierarchical porous structure. / Krivoshapkina, Elena F.; Krivoshapkin, Pavel V.; Vedyagin, Aleksey A.

In: Journal of Advanced Ceramics, Vol. 6, No. 1, 01.03.2017, p. 11-19.

Research output: Contribution to journalArticle

Krivoshapkina, Elena F. ; Krivoshapkin, Pavel V. ; Vedyagin, Aleksey A. / Synthesis of Al2O3–SiO2–MgO ceramics with hierarchical porous structure. In: Journal of Advanced Ceramics. 2017 ; Vol. 6, No. 1. pp. 11-19.
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