Gel preparation of lithium aluminosilicate powder(fumed silica as silica source)

Ch'ng, Bee Hoon (2010) Gel preparation of lithium aluminosilicate powder(fumed silica as silica source). Universiti Malaysia Sabah. (Unpublished)


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Fumed silica (SiO₂) was used as silica source to synthesize lithium aluminosilicate powders (LAS) in sol-gel process. The gel-powders obtained were calcined at 400 °e, 600°C, 800ºC and 1000 ºC. After calcination, the respective lithium aluminosilicate powder was subjected into Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscope (SEM) analysis. Preparation of bi-component and tri-component was done to prepare lithium aluminosilicate powders. Based on FTIR studies, Si-O-Si bonds were appeared in the region of 1083.95 cm�¹ for sample calcined at 400 °C. For sample caloned at 600°C, 800 ºC and 1000 °C, the band shifted to the right which led to the formation of Si-Q-AI bonds. By observing the four IR spectra, β-eucryptite was appeared in the region around 1005 cm�¹, 750 cm�¹ and 670 cm�¹. Based on SEM studies, the samples became denser and packed together as temperature gets higher due to the removal of water.

Item Type: Academic Exercise
Uncontrolled Keywords: silica, sol-gel process, calcination, FTIR, Scanning Electron Microscope
Subjects: T Technology > TP Chemical technology
Divisions: SCHOOL > School of Science and Technology
Depositing User: Unnamed user with email
Date Deposited: 03 Mar 2016 04:30
Last Modified: 30 Oct 2017 01:49

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