Templated Grain Growth of Textured PMN-28PT Using SrTiO3 Templates

• Published in: Journal of the American Ceramic Society 2009-01, Vol.92 (s1), p.S133-S139
• Main Authors: Brosnan, Kristen H., Poterala, Stephen F., Meyer, Richard J., Misture, Scott, Messing, Gary L.
• Format: Article
• Language: English
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1551-2916.2008.02628.x

Highly textured PMN‐28PT (0.72Pb(Mg1/3Nb2/3)O3–0.28PbTiO3) ceramics were produced by templated grain growth on oriented platelet‐shaped SrTiO3 template particles with an aspect ratio of 10–15. The templates were aligned in PMN‐28PT matrix powder via tape casting and fired in an O2–PbO atmosphere at 1150°C for up to 15 h. This resulted in textured ceramics with a 40 micrometer grain size and without residual templates. The volume fraction of textured material ( f ) and the orientation parameter (r) were quantified by fitting X‐ray diffraction rocking curve data to the March–Dollase equation. Processing conditions were optimized to achieve the best possible values of f and r for the chosen templates and matrix powder. A texture fraction of at least 81 vol% and an orientation parameter of 0.2 were achieved when all random matrix grains were consumed (a perfect textured ceramic would show a texture fraction of 100 vol% and an orientation parameter of 0).