Templated Grain Growth in Macroporous Materials

We demonstrate a facile method to produce crystallographically textured, macroporous materials using a combination of modified ice templating and templated grain growth (TGG). The process is demonstrated on alumina and the lead‐free piezoelectric material sodium potassium niobate. The method provide...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2014-06, Vol.97 (6), p.1736-1742
Main Authors: Bouville, Florian, Portuguez, Etienne, Chang, Yunfei, Messing, Gary L., Stevenson, Adam J., Maire, Eric, Courtois, Loic, Deville, Sylvain
Format: Article
Language:English
Subjects:
Alignment
Aluminum oxide
Ceramics
Chemical Sciences
Crystallography
Grain growth
Grains
Lead free
Long range order
Material chemistry
Materials science
Mathematical analysis
Morphology
Multifunctional materials
Piezoelectricity
Porosity
Potassium
Sodium
Surface layer
Texture
Walls
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Summary:We demonstrate a facile method to produce crystallographically textured, macroporous materials using a combination of modified ice templating and templated grain growth (TGG). The process is demonstrated on alumina and the lead‐free piezoelectric material sodium potassium niobate. The method provides macroporous materials with aligned, lamellar ceramic walls which are made up of crystallographically aligned grains. Each method showed that the ceramic walls present a long‐range order over the entire sample dimensions and have crystallographic texture as a result of the TGG process. We also present a modification of the March–Dollase equation to better characterize the overall texture of materials with textured but slightly misaligned walls. The controlled crystallographic and morphologic orientation at two different length scales demonstrated here can be the basis of multifunctional materials.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.12976