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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Melt processed multiphase ceramic waste forms for nuclear waste immobilization
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Melt processed multiphase ceramic waste forms for nuclear waste immobilization

机译：熔融处理的多相陶瓷废料形式，用于固定核废料

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摘要

Ceramic waste forms are promising hosts for nuclear waste immobilization as they have the potential for increased durability and waste loading compared with conventional boro silicate glass waste forms. Ceramics are generally processed using hot pressing, spark plasma sintering, and conventional solid-state reaction, however such methods can be prohibitively expensive or impractical at production scales. Recently, melt processing has been investigated as an alternative to solid-state sintering methods. Given that melter technology is currently in use for High Level Waste (HLW) vitrification in several countries, the technology readiness of melt processing appears to be advantageous over sintering methods. This work reports the development of candidate multi-phase ceramic compositions processed from a melt Cr additions, developed to promote the formation and stability of a Cs containing hollandite phase were successfully incorporated into melt processed multi-phase ceramics. Control of the reduction-oxidation (Redox) conditions suppressed undesirable Cs-Mo containing phases, and additions of Al and Fe reduced the melting temperature.
机译：陶瓷废料形式有望成为固定化核废料的宿主，因为与传统的硼硅酸盐玻璃废料形式相比，陶瓷废料形式具有提高耐用性和增加废物装载量的潜力。陶瓷通常使用热压，火花等离子体烧结和常规的固态反应进行加工，但是这种方法在生产规模上可能是昂贵的或不切实际的。最近，已经研究了熔融加工作为固态烧结方法的替代方法。鉴于一些国家目前正在将熔化器技术用于高放废物（HLW）玻璃化，因此熔体处理的技术就绪性似乎优于烧结方法。这项工作报道了由熔融的Cr添加剂加工而成的候选多相陶瓷组合物的开发，其开发是为了促进含Cs的锌铁矿相的形成和稳定性而成功地引入到熔融加工的多相陶瓷中。控制还原-氧化（Redox）条件抑制了不希望的含有Cs-Mo的相，并且Al和Fe的添加降低了熔融温度。

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