Aqueous slip casting of transparent yttrium aluminum garnet (YAG) ceramics

Kwadwo A. Appiagyei, Gary L. Messing, John Q. Dumm

Research output: Contribution to journalArticle

64 Scopus citations

Abstract

Transparent YAG ceramics were prepared by slip casting an aqueous dispersed mixture of commercial Al2O3 and Y2O3 powders. The powders were co-dispersed with poly(acrylic acid) and citric acid. Polyethylene glycol of 0.5 wt.% (PEG 4000) and 0.5 wt.% tetraethyl orthosilicate were added as binder and a sintering aid, respectively. Dried samples were vacuum sintered at 1800 °C for 16 h. In general, YAG ceramics cast from Newtonian suspensions were optically transparent and had optical transmittances >80% from 340 to 840 nm. Slightly flocculated dispersions, as evidenced by higher viscosity and non-Newtonian rheology, resulted in translucent samples with large pores and lower optical transmittances.

Original languageEnglish (US)
Pages (from-to)1309-1313
Number of pages5
JournalCeramics International
Volume34
Issue number5
DOIs
StatePublished - Jul 1 2008

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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