Synthesis of LaFeO₃ Nano-Powders by Self-Propagating Combustion Method of Sol-Gel

Abstract:

Nanocrystalline LaFeO₃ with particle size of about 50 nm was directly synthesized by sol–gel auto-combustion method at room temperature. The overall process involves three steps: formation of homogeneous sol; formation of dried gel; and combustion of the dried gel. Single phase nanocrystalline LaFeO₃ powders were successfully synthesized by the sol–gel self-propagation combustion method using glycin (C₂H₅NO₂) as the chelating agent. Discuss the synthesis products by DTA/TG, XRD and SEM. The experiment results show that the LaFeO₃ nano-powder was got from dried gel of G/M=1:1 at 300°C ignition temperature and then holding 2h at 800°C.The LaFeO₃ nano-powder is about 50nm with excellent dispersibility. The hysteretic loop show LaFeO₃ nanopowders have the character of ferromagnetism, the coercivity of the nanocrystalline LaFeO₃ is 99G, while the saturation is only 2.8 emug^-1.

• Periodical: Key Engineering Materials (Volume 544)
• Pages: 17-20
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.544.17
• Online since: March 2013
• Authors: Yan Feng Zhu, Wei Liang Liu, An Hua Wu, Zhen Qian Feng, Chuan Yong Wang, Jun Xu
• Keywords: LaFeO₃, Nano-Powder, Sol-Gel Auto-Combustion

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