Fabrication of fine mullite powders by α-Al(OH) 3 -SiO 2 core-shell structure precursors

Yue Feng Tang, Yi Nong Lü, Ai Dong Li, Xiao Yun Li, Shu Zhe Shi, Zhi Da Ling

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

In order to obtain fine mullite powders by a simple and inexpensive process, alpha aluminum hydroxide (α-Al(OH) 3 ) was used as raw material, and heterogeneous nucleation-and-growth process was chosen for the preparation of powders. Composite coating particles consisting of α-Al(OH) 3 cores with outer amorphous silica shell were prepared by heterogeneous nucleation-and-growth process in the ethanol suspension containing ammonia, tetraethylorthosilicate (TEOS) and α-Al(OH) 3 . Fine mullite powders (average particle size 0.67 μm) were fabricated by calcined composite coating particles at 1500 °C for 2 h.

Original languageEnglish
Pages (from-to)211-217
Number of pages7
JournalApplied Surface Science
Volume202
Issue number3-4
DOIs
StatePublished - 30 Dec 2002

Keywords

  • Composite coating particles
  • Core-shell structures
  • Fine mullite powders
  • Heterogeneous nucleation-and-growth process
  • Mullite stoichiometric ratio

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