Effect of Ultrasonication on the Microstructure and Tensile Elongation of Zirconia-Dispersed Alumina Ceramics Prepared by Colloidal Processing

Tohru S. Suzuki, Yoshio Sakka, Keishi Nakano, Keijiro Hiraga

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

To obtain dense, fine-grained ceramics, fine particles and advanced powder processing, such as colloidal processing, are needed. Al2O3 and ZrO2 particles are dispersed in colloidal suspensions by electrosteric repulsion because of polyelectrolyte absorbed on their surfaces. However, additional redispersion treatment such as ultrasonication is required to obtain dispersed suspensions because fine particles tend to agglomerate. The results demonstrate that ultrasonication is effective in improving particle dispersion in suspensions and producing a homogeneous fine microstructure of sintered materials. Superplastic tensile ductility is improved by ultrasonication in preparing suspensions because of the dense and homogeneous fine microstructure.

Original languageEnglish
Pages (from-to)2132-2134
Number of pages3
JournalJournal of the American Ceramic Society
Volume84
Issue number9
DOIs
Publication statusPublished - 2001 Sep
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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