Application of internal gelation to sol-gel synthesis of ceria-doped zirconia microspheres as nuclear fuel analogous materials

Tatsumi Arima, Kazuya Idemitsu, Kazuhiro Yamahira, Satoshi Torikai, Yaohiro Inagaki

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Optimizing of internal gelation based on the sol-gel synthesis was carried out for manufacturing of plutonium-doped zirconia microspheres used as nuclear fuels. In the present study, cerium was used as a surrogate for plutonium. So far, the Er0.05Y0.1CexZr0.85-xO 1.925 (x = 0.0-0.2) microspheres were successfully sintered to suppress the rapid reaction such as the thermal decomposition of by-products such as ammonium nitrate and formaldehyde at the calcination process. However, some cracks and pores were still observed in the sintered microspheres. As a result, these sintered densities reached 71-86% TD. From the crystallographic point of view, the sintered zirconia microspheres had the cubic fluorite structure and well formed the solid-solution oxide. The lattice constant of cubic zirconia increased with the amount of doped ceria.

Original languageEnglish
Pages (from-to)271-276
Number of pages6
JournalJournal of Alloys and Compounds
Volume394
Issue number1-2
DOIs
Publication statusPublished - May 17 2005

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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