Preparation and characterization of alkoxy-derived metastable cubic ZrO2 powders

Huey Chang Wang, Kwang Lung Lin

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Ultrafine alkoxy-derived ZrO2 powders have been prepared from the hydrolysis of zirconium n-butoxides with NaOH aqueous solutions of different pH values (pH 11, 13 and 13.7). The powders crystallize to form cubic phase at around 500°C and transform to tetragonal and monoclinic phases at around 900°C. Experimental results show that Na+ ions might be electrostatically trapped into the polymerized network structures by the Zr(OBU)3O- species which were formed in basic solutions. The trapped Na+ ions may act as nucleation catalysts, and the presence of Na+ is indeed necessary for stabilizing the cubic ZrO2 powders. The formation of needle-like monoclinic crystallites is attributed to the migration of ultrafine particles resulting from the evolution of sodium.

Original languageEnglish
Pages (from-to)249-255
Number of pages7
JournalMaterials Science and Engineering A
Volume147
Issue number2
DOIs
Publication statusPublished - 1991 Nov 15

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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