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Hot‐Pressed Glass Matrix Composites Containing Pyrochlore Phase Particles for Nuclear Waste Encapsulation
Author(s) -
Boccaccini A.R.,
Atiq S.,
Grimes R.W.
Publication year - 2003
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200300352
Subject(s) - materials science , pyrochlore , composite material , radioactive waste , lanthanum , fabrication , hot pressing , pressing , zirconate , homogeneous , phase (matter) , mineralogy , ceramic , titanate , waste management , medicine , inorganic chemistry , chemistry , alternative medicine , organic chemistry , pathology , engineering , physics , thermodynamics
As alternative immobilization materials for Pu‐bearing nuclear waste, lead‐containing glass matrix composites with homogeneously distributed lanthanum zirconate pyrochlore particles (up to 30 % by volume) have been developed. Fabrication by hot pressing at the relatively mild temperature of 610 °C leaves the pyrochlore structure of the La zirconate unchanged, which is crucial for the containment of radioactive nuclei. The Figure, an SEM image of a polished sample with 30 % La 2 Zr 2 O 7 , demonstrates the homogeneous particle distribution and absence of pores.