Carbonation effect on the synthesis of highly crystalline γ-alumina nanopowders

M. Sasani Ghamsari, Muhammad Azmi Abdul Hamid, Shahidan Radiman, A. H. Sasani Ghamsari, Sh Rahmani

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The sol-gel method has been used for preparation of highly crystalline γ-alumina with cubic structure. Aluminum chloride, ethanol, and water were selected as starting materials. CO2 gas was used to control the chemical pathway of γ-alumina production to occur with a desirable microstructure. The phase transformation from boehmite to γ-alumina has been evaluated by annealing the prepared sample at different temperatures. FTIR and X-ray diffraction were used to identify the organic compounds of prepared sol and the crystalline phase of synthesized powders. Transmission electron microscopy (TEM) study was carried out to show the size and morphology of prepared powders. Experimental results confirmed that the phase transformation from γ- to α-alumina shifted to lower temperatures (<1200 C) and a new transformation sequence of alumina was observed.

Original languageEnglish
Pages (from-to)439-442
Number of pages4
JournalMaterials Letters
Volume106
DOIs
Publication statusPublished - 2013

Fingerprint

Carbonation
Aluminum Oxide
Alumina
aluminum oxides
Crystalline materials
synthesis
Powders
phase transformations
Phase transitions
aluminum chlorides
Aluminum chloride
Polymethyl Methacrylate
Sols
organic compounds
Organic compounds
Sol-gel process
Ethanol
ethyl alcohol
Gases
gels

Keywords

  • γ-alumina
  • Carbonation process
  • Nanocrystalline materials
  • Sol-gel preparation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Carbonation effect on the synthesis of highly crystalline γ-alumina nanopowders. / Sasani Ghamsari, M.; Abdul Hamid, Muhammad Azmi; Radiman, Shahidan; Sasani Ghamsari, A. H.; Rahmani, Sh.

In: Materials Letters, Vol. 106, 2013, p. 439-442.

Research output: Contribution to journalArticle

Sasani Ghamsari, M. ; Abdul Hamid, Muhammad Azmi ; Radiman, Shahidan ; Sasani Ghamsari, A. H. ; Rahmani, Sh. / Carbonation effect on the synthesis of highly crystalline γ-alumina nanopowders. In: Materials Letters. 2013 ; Vol. 106. pp. 439-442.
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