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Application of Mechanical Activation for Production of Zirconate Pyrochlore Ceramic Containing Simulated Rare-Earth: Actinide Fraction of HLW

[+] Author Affiliations
S. V. Stefanovsky, O. I. Kirjanova, N. S. Mikhailenko

SIA Radon

S. V. Chizhevskaya

D. Mendeleev University of Chemical Technology

B. S. Nikonov

Institute of Geology of Ore Deposits RAS, Moscow, Russia

Paper No. ICEM2003-4672, pp. 1239-1242; 4 pages
doi:10.1115/ICEM2003-4672
From:
  • ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation
  • 9th ASME International Conference on Radioactive Waste Management and Environmental Remediation: Volumes 1, 2, and 3
  • Oxford, England, September 21–25, 2003
  • Conference Sponsors: Nuclear Engineering Division and Environmental Engineering Division
  • ISBN: 0-7918-3732-7 | eISBN: 0-7918-3731-9
  • Copyright © 2003 by ASME

abstract

Samples of zirconate pyrochlore ceramic (Ln)2 (Zr,U)2 O7 (Ln - lanthanides) containing simulated REE-An fraction of HLW were synthesized by conventional cold pressing of oxide mixtures in pellets under pressure of 200 MPa and sintering of pellets at 1550 °C for 24 hours and using preliminary mechanical activation of oxide powders for 5 or 10 min with a reduced sintering time for 6 hours. One more sample was produced by plasma melting. All the ceramic samples sintered at 1550 °C were monolithic and dense with high mechanically activated powders had higher chemical durability and mechanical properties.

Copyright © 2003 by ASME
Topics: Ceramics

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