Sol-Gel Synthesis and Characterization of LaAlO3 Nanoparticles Using Gelatin as Organic Precursor

Abstract:

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LaAlO3 has gained attention in the last few years because of its favorable microwave dielectric properties, excellent lattice matching and a good matching for thermal expansion. Nanoparticles of LaAlO3 were produced by using gelatin as an organic precursor. The optimum temperature for the phase formation of the precursor sample is found out by TG/DTA analysis. The specific surface area of the powder was measured by the BET technique with nitrogen. X-ray diffraction (XRD) was used to determine the phases present in the calcined powders and to estimate particle size. The morphology of LaAlO3 powder was studied by transmission electron microscopy (TEM). Microwave dielectric properties were measured using a HP8722ET network analyzer. The results demonstrate that pure perovskite LaAlO3 powder formed at 800 °C for 2 h. And the crystallite size was in the range of 17-48 nm. The specimen sintered at 1450 °C for 8 h shows 97.4% of the theoretical density and gave the excellent microwave dielectric properties: εr=23.3 and Qf=32300 GHz.

Info:

Periodical:

Advanced Materials Research (Volumes 105-106)

Edited by:

Wei Pan and Jianghong Gong

Pages:

242-244

DOI:

10.4028/www.scientific.net/AMR.105-106.242

Citation:

Z. Q. Tian et al., "Sol-Gel Synthesis and Characterization of LaAlO3 Nanoparticles Using Gelatin as Organic Precursor ", Advanced Materials Research, Vols. 105-106, pp. 242-244, 2010

Online since:

April 2010

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Price:

$35.00

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