Sol-gel synthesis and characterization of 0.5Pb(Zr0.52Ti0.48)O3-0.5Pb(Fe0.5Nb0.5)O3

BAROLIN, S.; PELLEGRI, N.; STACHIOTTI, M. G.; IMHOFF, L.

Foz do Iguaçú - PR

Congreso; 7º International Congress on Ceramics & 62º Congresso brasileiro de cerâmica; 2018

(1-x)PZT-xPFN thin films were prepared by a chelate route based on the use of acetoin (3-Hydroxy 2-butanone) as chelating agent. This material has perovskite structure and consists of a solid solution between PbZr0,52Ti0,48O3 and PbFe0,5Nb0,5O3, considering that adding magnetic Fe3+ ions to the PZT-structure was proved to be a good strategy to develop room-temperature multiferroic ceramics [1,2].In previous works an optimized chelate route for the fabrication of pyrochlore-free PZT was developed [3], and a similar approach was used to obtain the PFN precursor solution. Both precursors were mixed to obtain the different compositions and then deposited onto platinized silicon substrates Pt/Ti/SiO2/Si by spin coating and dried at 200 ºC on a hot plate. Two different thermal treatments were applied: Conventional Furnace Annealing (CFA) and Rapid Thermal Annealing (RTA) at 650ºC.Structural and morphologic characterizations were made by DRX and AFM finding coexistence between perovskite and pyrochlore, a secondary non-ferroelectric phase. It was also found that rapid thermal annealing favors the perovskite formation. Dielectric properties were measured and ferroelectric cycles were obtained at different frequencies. Finally, a weak magnetic response was found in the films, especially at those samples with high concentration of Fe3+.[1] A. Kumar, R.S. Katiyar, J.F. Scott, J. Appl. Phys., 108 (2010), 064105.[2] A. Kumar, I. Rivera, R.S. Katiyar, J.F. Scott, Appl. Phys. Lett., 92 (2008), 132913.[3] L. Imhoff, S. Barolin, N. Pellegri, M. Stachiotti, J. Sol-Gel Sci. Technol. (2017) 83:375-381.