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Title: Structure of yttria stabilized zirconia beads produced by gel supported precipitation

Abstract

Yttria stabilized zirconia (YSZ) is one of the inert matrix candidates selected for investigation as host matrix for minor actinide (MA) transmutation. The structural properties of (Zr0.84, Y0.16)O1.92 beads prepared by a sol-gel method for MA infiltration, are characterized as calcined (850 C) and sintered (1,600 C) beads. The calcined YSZ beads are fine-grained and homogenous over the entire sphere and are surrounded by a uniform outer layer of approximately 30 {micro}m thickness. After sintering at 1,600 C, the beads are compacted to 51% of their initial volume and exhibit a granular structure. The thermal expansion is nearly linear for the calcined material, but shows a parabolic behavior for the sintered (1,400 C) beads. In addition, the thermal expansion of calcined material is 20-25% less than after sintering. During heating up to 1,400 C, two processes can be distinguished. The first occurs between 900 and 1,000 C and is related to an increase in unit cell order. The second process involves grain-growth of the less crystalline calcined material between 1,100 and 1,300 C. These results have implications for preparation of YSZ and its use as an inert MA transmutation matrix.

Authors:
 [1];  [1];  [2];  [3];  [3];  [1];  [4];  [5]
  1. Institute for Transuranium Elements, Germany
  2. EURATOM-CIEMAT, Madrid, Spain
  3. ORNL
  4. Institut fur Nukleare Entsorgung, Karlsruhe, Germany
  5. Max-Planck-Institute for Chemical Physiscs of Solids, Dresden, Germany
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
931815
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Materials Science; Journal Volume: 42
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ZIRCONIUM OXIDES; YTTRIUM OXIDES; MATRIX MATERIALS; MORPHOLOGY; SOL-GEL PROCESS; GRAIN GROWTH; THERMAL EXPANSION; ACTINIDES; TRANSMUTATION

Citation Formats

Walter, M., Somers, J., Fernandez, A., Specht, Eliot D, Hunn, John D, Boulet, P., Denecke, M. A., and Gobel, C. Structure of yttria stabilized zirconia beads produced by gel supported precipitation. United States: N. p., 2007. Web. doi:10.1007/s10853-006-0515-8.
Walter, M., Somers, J., Fernandez, A., Specht, Eliot D, Hunn, John D, Boulet, P., Denecke, M. A., & Gobel, C. Structure of yttria stabilized zirconia beads produced by gel supported precipitation. United States. doi:10.1007/s10853-006-0515-8.
Walter, M., Somers, J., Fernandez, A., Specht, Eliot D, Hunn, John D, Boulet, P., Denecke, M. A., and Gobel, C. Mon . "Structure of yttria stabilized zirconia beads produced by gel supported precipitation". United States. doi:10.1007/s10853-006-0515-8.
@article{osti_931815,
title = {Structure of yttria stabilized zirconia beads produced by gel supported precipitation},
author = {Walter, M. and Somers, J. and Fernandez, A. and Specht, Eliot D and Hunn, John D and Boulet, P. and Denecke, M. A. and Gobel, C.},
abstractNote = {Yttria stabilized zirconia (YSZ) is one of the inert matrix candidates selected for investigation as host matrix for minor actinide (MA) transmutation. The structural properties of (Zr0.84, Y0.16)O1.92 beads prepared by a sol-gel method for MA infiltration, are characterized as calcined (850 C) and sintered (1,600 C) beads. The calcined YSZ beads are fine-grained and homogenous over the entire sphere and are surrounded by a uniform outer layer of approximately 30 {micro}m thickness. After sintering at 1,600 C, the beads are compacted to 51% of their initial volume and exhibit a granular structure. The thermal expansion is nearly linear for the calcined material, but shows a parabolic behavior for the sintered (1,400 C) beads. In addition, the thermal expansion of calcined material is 20-25% less than after sintering. During heating up to 1,400 C, two processes can be distinguished. The first occurs between 900 and 1,000 C and is related to an increase in unit cell order. The second process involves grain-growth of the less crystalline calcined material between 1,100 and 1,300 C. These results have implications for preparation of YSZ and its use as an inert MA transmutation matrix.},
doi = {10.1007/s10853-006-0515-8},
journal = {Journal of Materials Science},
number = ,
volume = 42,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}