Zeolite coating on foamed stainless steel by in-situ crystallization method

H. Asakura, C. D. Madhusoodana, Y. Kameshima, A. Nakajima, K. Okada

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Faujasite-type zeolite films were prepared on foamed stainless steel by the in-situ crystallization method. Precursor solutions were prepared by dissolving water glass and NaAlO2in a NaOH solution and aged at room temperature for two days. The concentrations of the starting materials were varied from 0.29 to 2.3 M (in SiO2concentration) keeping the molar ratios of Na2O:SiO2:Al2O3fixed at 3.6:3.0:1.0. The foamed stainless steel substrate had about 90% of porosity and an average pore size of 600 μ m. It was dip-coated in the precursor solution four times, then hydrothermally treated at 80°, 110° and 150°C for 6-48 h. The XRD patterns and SEM photographs revealed that faujasite-type zeolite was formed predominantly at a SiO2concentration of 1.1 M, temperature of 110°C and duration of 24 h, with a product particle size of 2-5 μ m. At higher concentrations of the precursor solution, hydroxylsodalite becomes the major product rather than faujasite-type zeolite. The adherence strength of the zeolite grains deposited on the foamed stainless steel is higher in the in-situ crystallization method than when a conventional solution method is used. Thus, the in-situ crystallization method is concluded to be effective for preparing zeolite films even on metal substrates.

Original languageEnglish
Pages (from-to)31-36
Number of pages6
JournalJournal of Electroceramics
Issue number1
Publication statusPublished - Sept 2006
Externally publishedYes


  • Faujasite-type zeolite
  • Foamed stainless steel
  • Hydrothermal treatment
  • In situ crystallization
  • Zeolite coating

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Materials Chemistry


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