Solution-derived sodalite made with Si- and Ge-ethoxide precursors for immobilizing electrorefiner salt

JOURNAL OF NUCLEAR MATERIALS

卷:468

Article

Riley, Brian J.¹  Lepry, William C.¹  Crum, Jarrod V.¹ 

[1] Pacific NW Natl Lab, Richland, WA 99352 USA

关键词: Sodalite;    Electrochemical waste forms;    Eutectic salt;    Ethoxide;    Alkoxide;   

DOI  :  10.1016/j.jnucmat.2015.11.011

来源: Elsevier

【 摘 要 】

Chlorosodalite has the general form of Na-8(AlSiO4)(6)Cl-2 and this paper describes experiments conducted to synthesize sodalite with a solution-based approach to immobilize a simulated spent electrorefiner salt solution containing a mixture of alkali, alkaline earth, and lanthanide chlorides. The reactants used were the salt solution, NaAlO2, and either Si(OC2H5)(4) or Ge(OC2H5)(4). Additionally, seven different glass sintering aids (at loadings of 5 mass%) were evaluated as sintering aids for consolidating the as-made powders using a cold-press-and-sinter technique. This process of using alkoxide additives for the Group IV component can be used to produce large quantities of sodalite at near-room temperature as compared to a method where colloidal silica was used as the silica source. However, the small particle sizes inhibited densification during heat treatments. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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