PREPARATION OF MULLITE POWDER BY CALCINATION OF THE PRODUCTS HYDROTHERMALLY TREATED FROM MIXED ALKOXIDE OR MIXED SOL.

Matsuo Suzuki, Sun ichi Hiraishi, Masahiro Yoshimura, Shigeyuki Somiya

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Abstract

Mullite powders were obtained by calcination of the products hydrothermally treated from mixed alkoxide or mixed sol, containing Al//2O//3:SiO//2 equals 3:2 (molar ratio). Pseudoboehmite-like phase, which contained both Al and Si components, was obtained by the hydrothermal treatment of mixed alkoxide or mixed sol, under 50 MPa at 300-400 degree C for 2 h. The pseudoboehmite-like phase particles from alkoxide were finer and more homogeneous than those from sol. The reaction among Al//2O//3, SiO//2 and H//2O was promoted to form aluminosilicates by the hydrothermal treatment under 50 MPa at 500-600 degree C for 2 h, using sol as a starting material.

Original languageEnglish
Pages (from-to)320-327
Number of pages8
JournalYogyo Kyokai Shi/Journal of the Ceramic Society of Japan
Volume92
Issue number6
Publication statusPublished - 1984 Dec 1

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

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