Synthesis and Characterization of γ-Al2O3/SiO2 Composite Materials

Munasir*, Diah Hari Kusumawati, Sunaryono, Nugrahani Primary Putri, Nurul Hidayat, Ahmad Taufiq, Zainul Arifin Imam Supardi

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


This article reports the synthesis process of γ-alumina/SiO2 composite from aluminium powders and amorphous nanosilica through the means of tetra-methyl-ammonium hydroxide (TMAH) as the mixing medium which produced aluminium hydroxide Al(OH)3 in the form of white powders. The crystal structures, microstructures, and mapping of the atomic constituent of γ-Al2O3 and γ-Al2O3/SiO2 samples were respectively analyzed via X-ray diffraction (XRD), and scanning electron microscopy-energy dispersive X-ray SEM-EDX. At the calcination temperature to 300 °C, the samples still had boehmite phase, and the boehmite phase transformation to γ-alumina phase occurred at temperature of 700-900 °C. The γ-alumina phase began to form at the calcination temperature of 500-700 °C with the crystal structure of (440), (511), (400), (222), (311), and (111). The similar diffraction pattern was also shown by the γ-Al2O3/SiO2 composite for the calcination temperature of 700 °C and 900 °C. The microstructure analysis of the γ-Al2O3/SiO2 showed that SiO2 particles were smaller and round while the γ-Al2O3 particles were bigger and elongated. Additionally, the mapping results showed SiO2 and γ-Al2O3 particles were homogenously distributed.

Original languageEnglish
Article number012015
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 10 Oct 2018
Externally publishedYes
Event2017 International Conference on Mathematics, Science, and Education, ICoMSE 2017 - Malang, East Java, Indonesia
Duration: 29 Aug 201730 Aug 2017


  • Composite
  • SiO
  • calcination
  • composite
  • γ-AlO


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