Templated Grain Growth of Textured Bismuth Titanate

Authors

  • Jeffrey A. Horn,

    1. Particulate Materials Center and Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802
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    • Member, American Ceramic Society.

  • S. C. Zhang,

    1. Particulate Materials Center and Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802
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  • U. Selvaraj,

    1. Particulate Materials Center and Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802
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  • Gary L. Messing,

    1. Particulate Materials Center and Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802
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    • Member, American Ceramic Society.

  • Susan Trolier-McKinstry

    1. Particulate Materials Center and Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802
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    • Member, American Ceramic Society.


  • W. A. Schulze—contributing editor

  • Supported by U.S. Air Force Office of Scientific Research under Grant No. F49620-94-1-0428.

Abstract

Textured bismuth titanate, Bi4Ti3O12 (BiT), was produced by templated grain growth (TGG). Molten-salt-synthesized BiT platelets were dispersed in a matrix of 200 nm BiT powder and aligned by tape casting. Highly textured BiT was obtained with the use of only 5 vol% template particles by sintering at 1000°C for 1 h. The uniformity of the through-thickness texture is much higher than reported in the literature for BiT tapes cast with 100% platelets. Initial platelet alignment is shown to increase because of frequent interaction with the fine powder particles during tape casting. By avoiding pressure densification techniques and using only a small portion of anisometric particles, TGG is a low-cost option for fabricating textured ceramics.

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