Preparation and Characterization of LaAlO₃ via Sol-Gel Process

Abstract:

Lanthanum aluminate powders were synthesized by sol-gel process with metal nitrates as raw materials, 2-methoxyethanol/water as solvent and citric acid as chelating agent. The influence of this techniques (the amount of citric acid, pH value, calcination temperature and the ratio of 2-methoxyethanol/water) on the lanthanum aluminate powders were studied. The XRD shows pure LaAlO3 powders could be obtained after calcining at 600-900 °C. The SEM analysis indicates that the LaAlO3 particles are uniform and nanosized with a range of about 40-70 nm, which is slightly larger than the estimated particle size using Scherrer formula.

• Periodical: Advanced Materials Research (Volume 624)
• Pages: 26-29
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.624.26
• Online since: December 2012
• Authors: Xiao Yan Zhang, Teng Zhang, Xi Wei Qi, Jian Quan Qi, Gui Fang Sun, Huan Huan Chen, Rui Xia Zhong
• Keywords: LaAIO₃ Powder, Sol-Gel Process

References

[1] S. Y. Cho, I. T. Kim, K. S. Hong, Microwave dielectric properties and applications of rare-earth aluminates, J. Mater. Res. 14 (1999), 114-119.

DOI: 10.1557/jmr.1999.0018

[2] R. W. Simon, C. E. Platt, A. E. Lee, et al., Low-loss substrate for epitaxial growth of high-temperature superconductor thin films, Appl. Phys. Lett. 53 (1988), 2677-2679.

DOI: 10.1063/1.100543

[3] R. Spinicci, P. Marini, S. D. Rossi, et al., Oxidative coupling of methane on LaAlO3 perovskites partially substituted with alkali or alkali-earth ions, J. Mol. Catal. A: Chem. 176 (2001), 253-265.

DOI: 10.1016/s1381-1169(01)00265-5

[4] G. Y. Sung, K. Y. Kang, S. C. Park, et al., Synthesis and preparation of lanthanum aluminate target for radio-frequency magnetron sputtering J. Am.Ceram. Soc. 74 (1991), 437-439.

DOI: 10.1111/j.1151-2916.1991.tb06904.x

[5] Q. Zhang, F. Saito, Mechanochemical Synthesis of Lanthanum Aluminate by Grinding Lanthanum Oxide with Transition Alumina, J. Am. Ceram. Soc. 83 (2000), 439-441.

DOI: 10.1111/j.1151-2916.2000.tb01215.x

[6] A. Barrera, S. Fuentes, M. Viniegra, M. Avalos-Borja, N. Bogdan Chikova, J. C. Molina, Structural properties of Al2O3-La2O3 binary oxides prepared by sol-gel. Materials Research Bulletin 42 (2007), 640-648.

DOI: 10.1016/j.materresbull.2006.08.001

[7] W. Li, M. W. Shi, J. L. Zhou, Synthesizing nano LaAlO3 powders via co-precipitation method. Materials Letters 58 (2004), 365-368.

DOI: 10.1016/s0167-577x(03)00502-0

[8] S. Li, B. Bergman, Z. Zhao, Synthesis and characterization of lanthanum aluminate powders via a polymer complexing plus combustion route, Materials Chemistry and Physics 132 (2012), 309-315.

DOI: 10.1016/j.matchemphys.2011.11.019

[9] Z. Q. Tian, H. T. Yu, Z. L Wang, Combustion synthesis and characterization of nanocrystalline LaAlO3 powders, Materials Chemistry and Physics 106 (2007), 126-129.

DOI: 10.1016/j.matchemphys.2007.05.027

[10] J. Chandradass, K. H. Kim, Synthesis and characterization of LaAlO3 nanopowders by emulsion combustion method, Journal of Alloys and Compounds 481 (2009), L31-L34.

DOI: 10.1016/j.jallcom.2009.03.072

[11] E. Mendoza-Mendoza, K. P. Padmasree, S. M. Montemayor, A. F. Fuentes, Molten salts synthesis and electrical properties of Sr- and/or Mg-doped perovskite-type LaAlO3 powders, J Mater Sci. 47 (2012), 6076-6085.

DOI: 10.1007/s10853-012-6520-1

[12] J. Chandradass, Y. J. Cha, K. H. Kim, Effect of Alumina Precursor on the Synthesis of LaAlO3 Nanopowders by Reverse Micelle Processing, Met. Mater. Int. 15 (2009), 1045-1048.

DOI: 10.1007/s12540-009-1045-0