Synthesis and Stabilization of BaTiO₃/CoFe₂O₄ Ferrocolloids

Abstract:

In this article, nanocomposites of BaTiO₃/CoFe₂O₄ have been prepared by sol-gel technique. The samples have been calcined at various temperatures ranging from 500 to 900 °C and then the microstructure of the composite nano-particles was studied. XRD, SEM analysis showed the powders can form the two phase composite system of BaTiO₃ and CoFe₂O₄ and the average particle size of the crystalline phases is 50nm at sintering temperature of 800 °C. In addition, we have studied the effects of different solvents and mixed solvents on the stability of the nanocomposites suspensions. Results of sediment volumes and conductivity showed under ultrasonic agitation for at least 25 min, suspensions of the BaTiO₃/CoFe₂O₄ in ethanol-acetylacetone (1:1 in volume) were most stable (the sediment volumes is 0.6cm3/0.4g, the conductivity is 9μS/cm). Electrophoretic deposition (EPD) was utilized for preparation of magnetoelectric (ME) composite films, the impact of deposition time and deposition voltage on electrophoretic deposition process was investigated. The obtained ME composite films exhibited good ferroelectric and ferromagnetic properties, which can meet the demand of ME devices.

• Periodical: Advanced Materials Research (Volumes 415-417)
• Pages: 362-367
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.415-417.362
• Online since: December 2011
• Authors: Dong Xiang Zhou, Fei Shi, Shu Ping Gong, Qiu Yun Fu
• Keywords: Electrophoretic Deposition (EPD), Ferroelectric, Ferromagnetic, Multiferroic, Sol-Gel (SG)

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