Abstract
Nanowires composite materials were synthesized from rice husk ash using by two metallothermic processes. The rice husk ash and carbon charcoal were mixed with Mg and Sn metals by various ratios and heated at 700℃ and 1000℃ under atmosphere of nitrogen gas. The formed products were studied by scanning electron microscope (SEM) and X-rays diffraction (XRD) technique. SEM images showed the structures of nanowires composite materials with diameter around 50-300 nm and length of more a few 10 μm. XRD patterns indicated the crystal structures of composite materials consisting of Si, MgO, Mg2SiO4 phase and SiC, SnO2 phase.
Highlights
Rice husks are very abundant waste products soluble in the rice farm
We used rice husk ash and carbon charcoal mixed with Sn powder, ratio of 1:0.1:0.1 by weight heated at 700°C under atmosphere of nitrogen gas around 1 hr
Nanowires composite materials were synthesized from rice husk ash using by two metallothermic processes
Summary
Rice husks are very abundant waste products soluble in the rice farm. The components of rice hush contained of13-29 % inorganic materials and 87-97 % of SiO2 (silica) in an amorphous state [1,2,3,4]. The rice husk ash was used to produce useful materials such as silica, silicon carbide, and silicon nitride [1,2,3,4,5,6,7,8,9]. Silica is a group IV metal oxide with the properties of good abrasion resistance, electrical insulator and high thermal stability. It is not soluble in all acids except for hydrogen fluoride (HF). Silica from rice husk ash is used as ceramic materials both a precursor of other ceramic products and silicon materials. The producing of silicon in rice husk can be prepared from two processes, the
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