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Alumina ceramics based on seeded boehmite and electrophoretic deposition |
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| Authors: | A. R. Boccaccini C. Kaya |
| Affiliation: | a Department of Materials, Imperial College of Science, Technology and Medicine, Prince Consort Road, London SW7 2BP, UK b Interdisciplinary Research Centre (IRC) and School of Metallurgy and Materials, The University of Birmingham, Edgbaston, Birmingham B15 2TT, UK |
| Abstract: | It is shown that seeding a commercial boehmite sol with crystallographically suitable seeds reduces both the crystallization temperature for the final -A12O3 phase and the sintering densification temperature. The seeding component was a tailored combination of δ- and -alumina particles in nanometre and micrometer ranges, respectively, dispersed in water. Electrophoretic deposition (EPD) provided a quick, simple and cost-effective processing route to prepare dense monolithic alumina ceramics from the seeded boehmite suspensions. EPD-formed green bodies could be sintered and densified at temperatures as low as 1250 °C for 2 h. |
| Keywords: | D. Alumina Boehmite Electrophoretic deposition Seeding |
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