Surface energetics of nanocrystalline YSZ powders

Gustavo C.C. Costa, Sergey V. Ushakov, Alexandra Navrotsky, Reginaldo Muccillo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Nanocrystalline 8 and 12 mol % yttria stabilized zirconia (YSZ) powders with fluorite-type structure were synthesized by a precipitation method. Powders were characterized by X-ray diffraction, differential scanning calorimetry, thermogravimetry, and nitrogen adsorption analyses. Precipitation produced amorphous powder which crystallized at approximately 450-470 °C into a cubic phase with a crystallization enthalpy ranging from 13.7 ± 0.6 kJ/mol for 8YSZ to 11.7 ± 0.5 kJ/mol for 12YSZ. Integral heat of water adsorption at room temperature measured on 8YSZ was -63 ± 2 kJ/mol for coverage 4.1 ± 0.1H2O/nm2. Drop solution calorimetry experiments were performed in a custom made Calvet twin calorimeter using sodium molybdate 3Na2O 4MoO3 solvent. The preliminary values for surface enthalpies of hydrated surfaces are 0.8 ± 0.1 J/m2 for 8YSZ and 1.3 ± 0.1 J/m2 for 12YSZ.

Original languageEnglish (US)
Title of host publicationStructure/Property Relationships in Fluorite-Derivative Compounds
PublisherMaterials Research Society
Pages72-76
Number of pages5
ISBN (Print)9781615677627
DOIs
StatePublished - 2008
Externally publishedYes
Event2008 MRS Fall Meeting - Boston, MA, United States
Duration: Dec 1 2008Dec 5 2008

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1122
ISSN (Print)0272-9172

Conference

Conference2008 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period12/1/0812/5/08

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Surface energetics of nanocrystalline YSZ powders'. Together they form a unique fingerprint.

Cite this