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Enhanced Magneto-Dielectric Properties of 0.6La_0.1Bi_0.9FeO₃- 0.4BaTiO₃/NiFe₂O₄ Composites Sintered with Powders Prepared with a One-Step Sol-Gel In-Situ Method

L. He, J. H. Wang, Z. T. Zhong, C. Zhang

Journal of Ceramic Science and Technology, Vol. 9, No. 2 (2018), pp. 175-182

DOI: 10.4416/JCST2017-00096

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Abstract

0.6La0.1Bi0.9FeO3-0.4BaTiO3/NiFe2O4 (0.6LBFO-0.4BT/NFO) composite powders were firstly prepared using a simple one-step sol-gel in-situ method. The phase evolution with the calcination temperature was studied. The dense-sintered 0.6LBFO-0.4BT/NFO ceramics were synthesized, and the phase composition as well as the surface morphology were characterized. The dielectric and magnetic properties were measured. The results indicated that with increasing concentration of NFO, the ceramic composite shows an increased dielectric constant (ε’) while the dielectric loss tangent (tan δε) value decreases at low frequencies range (in 5 kHz). The magnetic measurement indicates that all the composites show single-phase-like magnetic hysteresis loops and the introduction of NFO can significantly enhance the saturation magnetization (Ms) of 0.6LBFO-0.4BT.

Keywords

Ceramic composites, sol-gel in-situ method, magnetic-dielectric properties

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