SYNTHESIS OF BaTiO3 AND BaTi1-xMnxO3 NANOFIBERS BY ELECTRO-SPINNING
M.C. Maldonado-Orozco 1,2, J.E. Sosa-Márquez2, M.T. Ochoa-Lara2, M.F Piñon-Espitia2, J.J.C. Quintanar-Sierra3 and F.
Espinosa-Magaña2,3
1
Facultad de Ingeniería de la Universidad Autónoma de Chihuahua, México 31100.2 Centro de Investigación de Materiales
Avanzados, S.C., Laboratorio Nacional de Nanotecnología. Miguel de Cervantes 120,
Complejo Industrial, Chihuahua, Chih,
México 31136.3 Facultad de Ciencias, Universidad Autónoma de México, Ciudad Universitaria, 04510, México D. F. México
The electrospinning technique represents a convenient method for preparing polymeric-ceramic fibers.
In this work, BaTiO3 and BaTi1-xMnxO3 Nanofibers were synthesized by this technique. The starting
precursor solution was composed by poly(vinylpyrrolidone) (PVP), barium acetate Ba(C2H3O2)2, titanium
isopropoxide Ti[OCH(CH3)2]4 and manganese acetate Mn(C2H3O2)2 dissolved in ethanol/acetic acid. After
been stirred at room temperature for 2 h, the solution was delivered into a metallic needle at a
constant flow rate of 0.3 mL/h by a syringe pump. The metallic needle was connected to a
high-voltage power supply of 15 kV and a grounded aluminum foil was placed 15 cm from the
needle tip. The precursor solution jet was accelerated toward the aluminum foil, leading to the
formation of Ba(C2H3O2)2/Ti[OCH(CH3)2]4/Mn(C2H3O2)2/PVP fiber composite, together with a rapid
evaporation of the ethanol.
The composite nanofibers were then annealed for 2 h at 850 °C, at a heating rate of 3°C/min, and
at the end of the thermal cycle, BaTiO3 and BaTi1-xMnxO3 (x=2.5, 5 y 10%) nanofibers were obtained.
The presence of BaTiO3, BaTi0.975Mn0.025O3, BaTi0.95Mn0.05O3 and BaTi0.90Mn0.10O3 phases were confirmed
by X-ray diffraction (XRD), the thermal stability of as-spun composites were analyzed by
thermogravimetry-differential scanning calorimetry (TGA–DSC). Morphology and microstructural
characterization of calcined nanofibers were determined by Field-Emission Scanning Electron Microscopy
(FESEM) and High-Resolution Transmission Electron Microscopy (HRTEM). Further material identification
was conducted by acquiring Raman spectra.
Pure and Mn-doped BaTiO3 nanofibers have been successfully prepared by electro-spinning process,
nanofibers showing a length of few µm, formed by irregular shaped nanoparticles with size between
40 y 200 nm.
Keywords: Nanofibers, Electrospinning, Doped
References:
[1] Wu, Hui, and Wei Pan. "Preparation of zinc oxide nanofibers by electrospinning." Journal of the American Ceramic
Society 89, no. 2 (2006): 699-701.
[2] Kozuka, H., & Higuchi, A. (2001). Single-layer submicron-thick BaTiO3 coatings from
poly(vinylpyrrolidone)-containing sols: Gel-to-ceramic film conversion, densification, and dielectric properties. Materials
Research Society , 3116-3123.
Presenting author's email:
[email protected]