Templated grain growth of high coercive field CuO‐doped textured PYN‐PMN‐PT ceramics

• Published in: Journal of the American Ceramic Society Vol. 103; no. 11; pp. 6149 - 6156
• Main Authors: Brova, Michael J., Watson, Beecher H., Walton, Rebecca L., Kupp, Elizabeth R., Fanton, Mark A., Meyer, Richard J., Messing, Gary L.
• Format: Journal Article
• Language: English
• Published: Columbus Wiley Subscription Services, Inc 01-11-2020
• Subjects: Barium titanates; Ceramics; Coercivity; Curie temperature; Grain growth; Lead titanates; Liquid phases; piezoelectric materials; properties; sintering; texture; Texturing; Transducers
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/jace.17349

This paper explores the templated grain growth and texturing of Pb(Yb1/2Nb1/2)O3‐Pb(Mg1/3Nb2/3)O3‐PbTiO3 (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(Yb1/2Nb1/2)O3 (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/cm2 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.