Molten salt synthesis of Ce doped zirconolite for the immobilisation of pyroprocessing wastes and separated plutonium

Mason, Amber R.; Tocino, Florent; Stennett, Martin C.; Hyatt, Neil C.

doi:10.1016/j.ceramint.2020.08.080

Cited by 5 publications

(1 citation statement)

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“…The MSS method of synthesis exploits a salt, or a eutectic mixture of salts, which will melt at low temperature to create a liquid medium to assist in the diffusion of reactants [2][3][4]. MSS has been applied to the synthesis of lanthanide titanate pyrochlores at lower reaction temperatures and in shorter time scales, compared to conventional SSS.…”

Section: Introductionmentioning

confidence: 99%

A preliminary investigation of the molten salt mediated synthesis of Gd2TiO5 ‘stuffed’ pyrochlore

et al. 2021

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Refractory ‘stuffed’ pyrochlores such as Gd2TiO5 are of interest for nuclear applications, including as matrices for actinide disposition and as neutron absorbers in control rods. Here, we report the results of a preliminary comparative investigation of the synthesis of Gd2TiO5 by molten salt and conventional solid-state synthesis. We show that synthesis of Gd2TiO5 proceeds from the pyrochlore phase Gd2Ti2O7 which is first formed as a kinetic product. Molten salt synthesis afforded single phase Gd2TiO5 at 1300 °C in 2 h, via a template growth mechanism, and is effective for the synthesis of these refractory materials. This work demonstrates molten salt mediated synthesis of ‘stuffed’ pyrochlore for the first time. Graphic abstract

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Section: Introductionmentioning

confidence: 99%