Structural Effects on Perovskite Phase Formation for PZT Powders Obtained by Polymeric Precursor Method

Abstract:

Many synthesis methods are available to obtain a set of specific characteristics for lead zirconate titanate (PZT) piezoelectric ceramic powders. In this work, we have successfully prepared PZT powder samples through the Polymeric Precursor Method with x = 0.6, according the general formula Pb (Zr_xTi_1-x)O₃. The powders were thermally treated from 380 to 550 oC and characterized by Raman spectroscopy and X-ray diffraction (DRX) in order to evaluate the effects of thermal treatment on the phase formation and the crystallization processes. The results obtained by Raman spectroscopy were compared to refined crystal data obtained by Rietveld method, leading to coherent conclusions about the structural effects occurring along the temperature of calcination. It was possible to characterize the tetragonal perovskite phase as predominant phase occurs only after 500 oC, but its crystallinity is already determined by synthesis method. Thus, no ordering process is verified for perovskite as a function of the temperature increasing during thermal treatment, in spite of the continuous pyrochlore-to-perovskite phase transition. The pyrochlore secondary phase starts to vanish before its proper crystallization process, changing the tetragonality of previously formed perovskite phase.

• Periodical: Materials Science Forum (Volume 930)
• Pages: 101-106
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.930.101
• Online since: September 2018
• Authors: Margarete Soares da Silva*, Lucas L. da Silva, Eliane F. de Souza, Talita Cuenca Pina Moreira Ramos, Igor Silva de Sá, Graciele Vieira Barbosa, Elson Longo, Alberto Adriano Cavalheiro
• Keywords: Crystallization, Phase Formation, PZT, RAMAN, Rietveld, XRD

References

[1] M.G. Kang, W.S. Jung, C.Y. Kang, S.J. Yoon: Actuators Vol. 5 (2016), p.1.

[2] R. Galos, Y. Shi, Z. Ren, L. Zhou, H. Sun, X. Su, J. Yuan: J. Nanomater Vol. 2017 (2017), p.1.

[3] C.A. Oliveira, E. Longo, J.A. Varela, M.A. Zaghete: Ceram. Int. Vol. 40 (2014), p.1717.

[4] C.E. Land, P. Thatcher, G.H. Haertling: Electrooptic ceramics, in: R. Wolfe (ed), Advances in Materials and Device Research 4, Academic Press, New York, 1974, pp.137-233.

[5] M.P. Pechini, Method of preparing lead and alkaline eart titanates and niobates and coating method using the same to form a capacitor, U.S. Patent 3,330,697. (1967).

[6] M.S. Silva, A.A. Cavalheiro, M.A. Zaghete, M.C., G.F. Teixeira, G.F. Cavenago, R.G. Dias, L.L. Silva: Mater. Sci. Forum Vol. 805 (2015), p.519.

[7] A. Mirzaei1, M. Bonyani, S. Torkian: Proc. Appl. Ceram. Vol. 10 (1) (2016), p.9.

[8] E. Buixaderas, I. Gregora, M. Savinov, J. Hlinka, Li Jin, D. Damjanovic, B. Malic: Phys Rev B Vol. 91 (2015), p.014104.

[9] L. Ting, L. Junhong, D. Wenlong, X. Chenyang, Z. Wendong: J. Semicond. Vol. 30 (2009), p.083001.

DOI: 10.1088/1674-4926/30/8/083001

[10] JCPDS - Joint Committee on Powder Diffraction Standards/International Center for Diffraction Data, Pennsylvania, Powder Diffraction File, (2003).

[11] ICSD - Inorganic Crystal Structure Database. Version 1.3.1, (2003).

[12] H.M. Rietveld: J. Appl. Cryst. Vol. 2 (1969), p.65.

[13] R.A. Young, A. Sakthivel, T.S. Moss, C.O. Paiva-Santos: J. Appl. Cryst. Vol. 28 (1995), p.366.

[14] M.G. Garnica-Romo, A. Páez-Sánchez, L. García-González, I. Domínguez-López, L.L. Díaz-Flores, M. Villicaña-Mendez: J. Sol-Gel Sci. Technol. Vol. 74 (2015), p.425.

DOI: 10.1007/s10971-015-3617-4

[15] E. Buixaderas, C. Kadlec, P. Vaněk, S. Drnovšek, H. Uršič, B. Malic: Bol. Soc. Esp. Ceram. Vol. 54 (2015), p.219.

[16] E. Buixaderas, M. Berta, L. Kozielski, I. Gregora: Phase Transit. Vol. 84 (2011), p.528.

[17] K.C.V. Lima, A.G. Souza, A.P. Ayala, J. Mendes Filho, P.T.C. Freire, F.E.A. Melo, E.B. Araújo, J.A. Eiras: Phys Rev B Vol. 63 (2001), pp.184105-1.

[18] I. Levin, E. Cockayne, M.W. Lufaso, J.C. Woicik, J.E. Maslar: Chem. Mater. Vol. 18 (2006), p.854.