Accession Number : ADA180414

Title :   Preparation and Characterization of Cubic ZrO2 Stabilized by Fe(III) and Fe(II).

Descriptive Note : Technical rept.,

Corporate Author : BROWN UNIV PROVIDENCE RI DEPT OF CHEMISTRY

Personal Author(s) : Davison,S. ; Kershaw,R. ; Dwight,K. ; Wold,A.

Report Date : 15 MAY 1987

Pagination or Media Count : 17

Abstract : Samples of cubic zirconium oxide contained 2.5at% - 40af% ferric iron were prepared by codecomposition of the nitrates. X-ray powder diffraction analysis and magnetic measurements indicated that alpha iron nitrate and ZRO2 form a solid solution up to 25at% Fe/Zr in the product. At this point, the solubility limit of alpha-Fe2O3 in ZrO2 is exceeded. The reduction of cubic zirconia samples containing 2.5at% - 20at% Fe(III) leads to the stabilization of iron (II) in the zirconia lattice. Reduction to metallic iron occurs at much higher temperatures than the reduction of bulk alpha-Fe2O3. (Reprints)

Descriptors :   *PHASE STUDIES, *DIFFRACTION ANALYSIS, *SOLID SOLUTIONS, *ZIRCONIUM OXIDES, *CRYSTAL STRUCTURE, *X RAY DIFFRACTION, HIGH TEMPERATURE, IRON, MAGNETIC FIELDS, MEASUREMENT, METALS, NITRATES, POWDERS, REDUCTION, REPRINTS, X RAYS, REPRINTS, SYNTHESIS(CHEMISTRY), REDUCTION(CHEMISTRY), THERMAL INSTABILITY, GRAVIMETRIC ANALYSIS

Subject Categories : Crystallography
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE