Hydrothermal transformation of magnetically orientation-controlled seed layer into orientation-retained dense, continuous film in clear reaction solution

Chika Matsunaga, Tetsuo Uchikoshi, Tohru S. Suzuki, Yoshio Sakka, Motohide Matsuda

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1 Citation (Scopus)

Abstract

Randomly-oriented and b-axis oriented mordenite seed layers, which were pre-fabricated out of and in a strong 12T magnetic field, were hydrothermally treated in clear reaction solutions with molar ratios of 6Na2O: Al2O3:30SiO2:xH2O (x = 1500, and 10000). Crystal growth of the seed particles only slightly occurred in the solution of x = 10000, but occurred in the solutions of x = 1500 and 3500, giving rise to densified films. However, the films treated with x = 1500 were composed of two layers with different morphologies; i.e., the precipitation of crystals from the solution was considered to induce the upper layer in the bilayered films. Homogenized films were formed in the solutions of x = 3500. The initial orientation of the seed layer was retained in the continuous films treated at x = 3500. Thus, dense, continuous mordenite films with random and b-axis orientations were successfully fabricated from random and b-axis oriented seed layers by hydrothermal treatment in the clear reaction solutions at the molar ratio of 6Na2O:Al2O3:30SiO 2:3500H2O.

Original languageEnglish
Pages (from-to)550-554
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume121
Issue number1415
DOIs
Publication statusPublished - 2013 Jul

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Keywords

  • Dense film
  • Mordenite
  • Orientation
  • Secondary growth
  • Seed layer

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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