Investigations of ice-structuring agents in ice-templated ceramics
| Autor: | Sarah N. Ellis, Mary Anne White, Jacy Conrad, Ran Chen |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Zirconium Aqueous solution Materials science chemistry.chemical_element Green body 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Polyvinyl alcohol chemistry.chemical_compound chemistry visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites Slurry visual_art.visual_art_medium Lamellar structure Ceramic Composite material 0210 nano-technology Layer (electronics) |
| Zdroj: | Journal of the American Ceramic Society. 100:5066-5074 |
| ISSN: | 0002-7820 |
| Popis: | The freeze-cast ceramics process involves the use of an aqueous slurry in which ice acts as a fugitive template, providing control of the morphology of the resultant green body, which is then sintered. Here we report the role of various additives and procedures in tailoring the morphology of ice-templated, freeze-cast alumina ceramics. We show that zirconium acetate in the slurry can change the structure from lamellar to columnar, whereas polyvinyl alcohol can act as both a binder and as a modifier of the ice surface, and can compete with zirconium acetate to provide cooperative effects and a wide range of porosities. We also show that the ceramic structure can be influenced by epitaxial growth on an oriented layer of ice. This article is protected by copyright. All rights reserved. |
| Databáze: | OpenAIRE |
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