|AVS 55th International Symposium & Exhibition|
|Nanometer-scale Science and Technology||Tuesday Sessions|
|Presenter:||K.T. Kim, University at Buffalo, the State University of New York|
|Authors:||K.T. Kim, University at Buffalo, the State University of New York
C.I. Kim, Chung-Ang University, Korea
Y.K. Yoon, University at Buffalo, the State University of New York
|Correspondent:||Click to Email|
The bismuth layer-structured ferroelectrics have been known as high dielectric materials with attractive properties such as environmentally friendly lead-free composition and fatigue free characteristic. Specially, the La-substituted Bismuth Titanate (Bi3.25La0.75 Ti3 O12 :BLT) has received the intensive attention for their excellent ferroelectric, crystalline properties as a promising dielectric for capacitors and memory devices.1 Recently, there has been an intense research effort on one dimensional nano materials such as nanotube and nanofiber due to their unique structure and properties, such as high aspect ratio, large specific surface area and chemical/mechanical stabilities.2 In this study, BLT nanofiber synthesis has been demonstrated using electrospinning and subsequent sintering. A composite solution consisting of a metal-organic decomposition solution of BLT and a binder of poly(vinylpyrrolidone) (PVP) has been electrospun in an electric field of 3 x105 V/m to form nanofiber with a diameter of 120 nm. The BLT/PVP composite nanofiber has been calcined in air for 1 h at 500, 600, 700, 750, and 800 oC, respectively. The characteristics by X-ray diffraction, FT-IR, SEM and HR-TEM of the BLT/PVP composite nanofibers are reported.
1 B. H. Park, B. S. Kang, S. D. Bu, T. W. Noh, J. Lee and W. Jo, Nature (London) 401, 682 (1999).
2 S.V. Fridrikh, J.H. Yu, M.P. Brenner and G.C. Rutledge, Phys. Rev. Lett. 90 (2003), p. 144502.