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Improvement of the dielectric properties of BaTiO3 powder-polymer composite using molten salt treatment

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6 Author(s)
Jin-Young Kim ; Dept. of Phys., Sungkyunkwan Univ., Suwon, South Korea ; Shang Hyeun Park ; Taewon Jeong ; Yong Churl Kim
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The dielectric films consisted of the barium titanate (BaTiO3) powder particle and the polymer were fabricated using the sodium chloride (NaCl)-flux treatment to investigate the effect of the molten salt on the dielectric properties of the BaTiO3 particles. The BaTiO3 particles for the NaCl-flux treatment were prepared by calcining the mixture of the BaTiO3 and the NaCl at the various temperatures. The NaCl-flux treated BaTiO3 particles showed the smooth surface and high crystallinity compared to the non-treated BaTiO3 particles, because the BaTiO3 particles were recrystallized by NaCl-flux treatment. In addition, high dielectric performances of a 20% increase in the dielectric constant, a 40% decrease in the dielectric loss, and a 280% increase in the dielectric strength were achieved. The dielectric films of the NaCl-flux treated BaTiO3 particles could induce the high dielectric performances due to the improvement of the crystallinity with highly packing density.

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Dielectrics and Electrical Insulation, IEEE Transactions on  (Volume:19 ,  Issue: 5 )