Journal
CERAMICS INTERNATIONAL
Volume 44, Issue 9, Pages 10813-10819Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.03.123
Keywords
Lead-free piezoelectric; (Bi0.5Na0.5)(0.92)Ba0.08TiO3; Ferrite CoFe2O4; Sol-gel processes; Coaxial core-shell nanotubes
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In this work we report on a new 1-1 composite coaxial nanostructure containing nanotubes of CoFe2O4 and BET-BT0.08 prepared by a template-based fabrication technique using the sol-gel chemistry. In this regard, CoFe2O4/BNT-BT0.08 core-shell nanotubes were prepared using a polycarbonate membrane template and sols precursors of CoFe2O4 and BNT-BT0.08. The deposition of nanotubes was performed by pore wetting of the porous membranes via capillary action and subsequent pyrolysis. The studies with scanning electron microscopy and transmission electron microscopy (TEM) revealed that the composite material is characterized by the 1-D tubular structure. Analysis by X-ray diffraction, high-resolution TEM imaging and selected-area electron diffraction pattern demonstrated that the synthetic composite nanotube CoFe2O4/BNT-BT0.08 has crystalline structure with cubic CoFe2O4 and rhombohedral BNT-BT0.08 phases. CoFe2O4/BNT-BT0.08 coaxial nanotubes show dielectric properties, piezoelectric and ferromagnetic behavior.
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