Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
Technical report
Effect of ZrO2 addition on water durability of FeO–Fe2O3–P2O5 glasses
Naoto KITAMURAAkira NOMURAAkira SAITOHHidekazu KOBAYASHIIppei AMAMOTOHiromichi TAKEBE
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2018 Volume 126 Issue 11 Pages 948-951

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Abstract

We have studied the water durability of ZrO2 containing FeO–Fe2O3–P2O5 glasses for the immobilization of nuclear waste including Zr isotope. ZrP2O7 crystals with 1–2 micrometer in diameter were precipitated in the glass matrix incorporated with ≥1 mol % ZrO2. The molecular structure of phosphate network including ZrP2O7 precipitates was analyzed by micro-Raman spectroscopy. Formations of Q1 and Q0 phosphate units contributing to better water durability are ascribed to preferential precipitation of ZrP2O7 crystals with Q1 units and the compensation of phosphate component in residual glass matrix.

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© 2018 The Ceramic Society of Japan
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