Alumina ceramics based on seeded boehmite and electrophoretic deposition

Boccaccini A., Kaya C.

CERAMICS INTERNATIONAL, cilt.28, sa.8, ss.893-897, 2002 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 28 Sayı: 8
  • Basım Tarihi: 2002
  • Doi Numarası: 10.1016/s0272-8842(02)00070-6
  • Dergi Adı: CERAMICS INTERNATIONAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.893-897
  • Anahtar Kelimeler: alumina, boehmite, electrophoretic deposition, seeding, ALPHA-ALUMINA, GAMMA-AL2O3 POWDERS, SOL-GEL, TRANSFORMATION, COMPOSITES, DENSIFICATION, FABRICATION
  • Yıldız Teknik Üniversitesi Adresli: Hayır

Özet

It is shown that seeding a commercial boehmite sol with crystallographically suitable seeds reduces both the crystallization temperature for the final alpha-Al(2)O(3) phase and the sintering densification temperature. The seeding component was a tailored combination of delta- and alpha-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 degreesC for 2 h. (C) 2002 Elsevier Science Ltd and Techna S.r.l. All rights reserved.