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Crystallization behavior in a low temperature acetate process for perovskite PbTiO3, Pb(Zr, Ti)O3, and (Pb1−x, Lax) (Zry, Ti1−y)1−x/4O3 bulk powders

  • C.T. Lin (a1), B.W. Scanlan (a1), J.D. McNeill (a1), J.S. Webb (a1), Li Li (a1), R.A. Lipeles (a2), P.M. Adams (a2) and M.S. Leung (a2)...

Abstract

An aqueous, metallo-organic precursor for PbTiO3 (PT), Pb(Zr, Ti)O3 (PZT), and (Pb1−x, Lax) (Zry, Ti1−y)1−x/4O3 (PLZT) ceramic powders has been developed employing the acetate complexes of Pb2+, La3+, Zr4+, and Ti4+. The crystallization behavior (e.g., degree of crystallization and crystallite size) was examined over the temperature range of 400–700 °C with concentrations of excess lead varying from 0–5% using x-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy techniques. It was found that PT, PZT, and PLZT crystallize at temperatures as low as 450 °C, 500 °C, and 500 °C, respectively, and the excess lead required for crystallization of the perovskite phase is ⋚1%. Intermolecular mixing among acetate precursors via chelating and bridging structures was evident and appeared to be responsible for the low crystallization temperatures. The process is compared to the current sol-gel methods for its possible use in thin film ferroelectric manufacture.

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Crystallization behavior in a low temperature acetate process for perovskite PbTiO3, Pb(Zr, Ti)O3, and (Pb1−x, Lax) (Zry, Ti1−y)1−x/4O3 bulk powders

  • C.T. Lin (a1), B.W. Scanlan (a1), J.D. McNeill (a1), J.S. Webb (a1), Li Li (a1), R.A. Lipeles (a2), P.M. Adams (a2) and M.S. Leung (a2)...

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