Templated grain growth of high coercive field CuO‐doped textured PYN‐PMN‐PT ceramics
Michael J. Brova, Beecher H. Watson, Rebecca L. Walton, Elizabeth R. Kupp, Mark A. Fanton, Richard J. Meyer, Gary L. Messing
Pennsylvania State University Applied Research Laboratory at Penn State
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This paper explores the templated grain growth and texturing of Pb(Yb 1/2 Nb 1/2 )O 3 ‐Pb(Mg 1/3 Nb 2/3 )O 3 ‐PbTiO 3 (PYN‐PMN‐PT) ceramics. A PbO‐CuO liquid phase was determined to substantially increase the growth of PYN‐PMN‐PT on barium titanate template particles. Texturing resulted in an 83% enhancement in strain behavior (754 pm/V) compared with random PYN‐PMN‐PT ceramics (413 pm/V). The increased Pb(Yb 1/2 Nb 1/2 )O 3 (PYN) content of textured 21PYN‐41PMN‐38PT resulted in a high coercive field of 13.9 kV/cm. Residual barium titanate templates reduced the polarization from 33.7 to 26.2 µC/cm 2 and slightly decreased the Curie temperature (236‐224°C). These results show that textured PYN‐PMN‐PT is a promising material for high strain and coercive field transducers.
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