Effect of Y2O3 addition on the phase transition and growth of YSZ nanocrystallites prepared by a sol-gel process

Chih Wei Kuo, Yueh Hsun Lee, Kuan Zong Fung, Moo Chin Wang

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46 Citations (Scopus)

Abstract

The effect of Y2O3 addition on the phase transition and growth of yttria-stabilized zirconia (YSZ) nanocrystallites prepared by a sol-gel process with various mixtures of ZrOCl2 • 8H 2O and Y(NO3)3 • 6H2O ethanol-water solutions at low temperatures has been studied. DTA/TGA, XRD, SEM, TEM and ED have been utilized to characterize the YSZ nanocrystallites. The crystallization temperature of 3YSZ, in which Y2O3/(Y 2O3 + ZrO2) = 0.03, gel powders estimated by DTA/TG is about 427 °C. When 3YSZ and 5YSZ gels are calcined at 500-700 °C, their crystal structures as composed of coexisting tetragonal and monoclinic ZrO2, and tetragonal phase decreases with calcination temperature increasing from 500 to 700 °C. Pure cubic ZrO2 is obtained when added Y2O3 is greater than 8 mol%. A nanocrystallite size distribution between 10 and 20 nm is obtained in TEM observations.

Original languageEnglish
Pages (from-to)304-311
Number of pages8
JournalJournal of Non-Crystalline Solids
Volume351
Issue number4
DOIs
Publication statusPublished - 2005 Feb 15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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