Preparation of Nanocrystalline α-Al2O3 Using Plant Fiber
Abstract:Nanocrystalline α-Al2O3 ceramic powders have been prepared from aqueous poly vinyl alcohol (PVA)-aluminum nitrate solution and jute (plant fiber). Soluble Al-ion-PVA solution formed a uniform coating on the surface of jute once it dried completely. Slow hydrolysis of aluminum ion with ammonium hydroxide deposited aluminum hydroxide on the jute surface. Decomposition of the dried aluminum hydroxide-coated jute at high temperature (1150 °C/2hrs) resulted in the formation of single-phase, nanocrystalline α-Al2O3 with the corresponding average X-ray and TEM particle size ~50 nm. Precursor and heat-treated powders have been characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) analysis. This method can be used to produce high-temperature as well as low-temperature nanocrystalline oxides.
Document Type: Short Communication
Publication date: January 1, 2004
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