首页|Effects of MoO3 and Nd2O3 on the structural features, thermal stability and properties of iron-boron-phosphate based glasses and composites

Effects of MoO3 and Nd2O3 on the structural features, thermal stability and properties of iron-boron-phosphate based glasses and composites

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© 2021 Elsevier B.V.Three series of iron-boron-phosphate based glasses and composites as hosts for MoO3 and Nd2O3 were prepared by a melt-quenching process. The effects of MoO3 and Nd2O3 on phase composition, structural features, thermal stability and aqueous durability of the iron-boron-phosphate glasses and composites were investigated in detail. The results show that the 5∼15 mol% MoO3 containing samples with Nd2O3 content less than 3 mol% are fully amorphous, monazite NdPO4 phase is detected in their amorphous structure while more than 3 mol% of Nd2O3 incorporated. Generally, the incorporation of Nd2O3 and MoO3 enhances the crystallization of NdPO4 phase, and induces the decrease of Q0 units and the increase of [MoO4], Q1 and Q2 units. Thermal stability of glassy phase in the samples is enhanced with the increase in MoO3 content, although its thermal stability decreases due to the formation of NdPO4 phase. Moreover, the reasons on the variations of structure and thermal stability are discussed. LRMo are about 10−4 ∼ 10−3 g·m−2·d−1 for 14 days and LRNd are believed to be less than ∼10−6 g·m−2·d−1, indicating their good aqueous durability. The conclusions provide researchers with the roles of MoO3 and Nd2O3 in iron-boron-phosphate based glasses and composites as potential hosts for Mo- and Nd-containing nuclear waste.

MolybdenumNeodymiumPhosphate based materialsStructural featuresThermal properties

Wang F.、Wang Y.、Hao Y.、Liao Q.、Zhu H.、Zhou J.、Zhang D.、Zhu Y.

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State Key Laboratory of Environment-friendly Energy Materials School of Materials Science and Engineering Southwest University of Science and Technology

School of Environment and Resource Southwest University of Science and Technology

China Building Materials Academy

2022

10.1016/j.jnucmat.2021.153500

Journal of Nuclear Materials

Journal of Nuclear Materials

EISCI
ISSN：0022-3115
年,卷(期)：2022.560
  • 63