Synthesis and nonlinear optical characterization of nanocrystalline γ-alumina produced by in-flight thermal plasma route
Department of Physics, Tarbiat Moallem University, 1571914911, Tehran, Iran
2 Department of Physics, Qom Branch, Islamic Azad University Qom, 3714668669, Qom, Iran
Corresponding author: email@example.com
Accepted: 6 December 2010
Published online: 22 February 2011
Using a plasma spray torch, nanocrystalline γ-alumina powder has been synthesized in a reactor through oxidation of micron-size aluminum metal powder by in-flight thermal plasma processing. The synthesized particles were characterized by X-ray diffraction (XRD) and field emission transmission electron microscopy (FE-TEM). The particle size was in the range of ~7 to ~56 nm and spherical in shape. Furthermore the nonlinear refractive and absorptive indices of the sample under various intensities using Z-scan and moiré deflectometry techniques by a CW He-Ne laser at 632.8 nm wavelength were measured.
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