Phase equilibria in the system CsFZrF4

Robbins, G.D.; Thoma, R. E.; Insley, Herbert

doi:10.1016/0022-1902(65)80261-5

Cited by 20 publications

(3 citation statements)

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“…47 In fact, the temperature of eutectic melting is expected at higher temperatures for CHF, as it was reported at 646 °C for Cs 2 ZrF 6 , which is chemically very similar to CHF. 48 Calcination at 600 °C in air leads to a total destruction of the halide lattices in both cases, forming various oxide species in the case of CHF, while CsCl and HfO 2 are formed in the case of CHC. By studying the thermal evolution of the CHF and CHC particle powders obtained, CHF proved to be less hygroscopic, and showed superior thermal stability up to 240 °C, which was not the case for CHC micropowders.…”

Section: Thermal Stabilitymentioning

confidence: 99%

“…The eutectic melting of Cs 2 ZrF 6 , which is chemically very similar to Cs 2 HfF 6 and crystallises in the same space group, has been reported at 646 °C. 29,48 The thermal dissociation of Cs 2 HfF 6 has been reported at 1076 °C. 49 Compared to this, both the eutectic melting (500 °C) and the decomposition (700 °C) occur at much lower temperatures in the CHF nanopowders presented here.…”

Section: Thermal Stabilitymentioning

confidence: 99%

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Synthesis and luminescence of Cs₂HfCl₆ micro- and Cs₂HfF₆ nanoparticles

Fellener

Lauria

2022

J. Mater. Chem. C

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Section: Thermal Stabilitymentioning

confidence: 99%

Section: Thermal Stabilitymentioning

confidence: 99%

Synthesis and luminescence of Cs₂HfCl₆ micro- and Cs₂HfF₆ nanoparticles

Fellener

Lauria

2022

J. Mater. Chem. C

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“…The invariant equilibria for the ternary system of LiF-BeF2-ZrF4 are tabulated below, and the binary phase diagrams for ZrF4 with BeF2 and with LiF can be seen below. The binary phase diagram for CsF-ZrF4 can be found in literature [63] as well as in Figure 2-23 [14].…”

Section: Zirconiummentioning

confidence: 99%

Thermochemical Modeling in Molten Fluoride Salts for Radionuclide Speciation

Shahbazi

Bucknor

Thomas

et al. 2021

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An important aspect of the licensing process for nuclear reactors is providing a reasonable assurance of safety to the general public. This includes modeling potential radionuclide releases from the reactor during normal operations and accident scenarios, which is known as the reactor's source term. A new class of advanced (non-LWR) reactors are being developed which use molten salts as the coolant fluid. Because the molten salt coolant represents a credited barrier for radionuclide transport between the fuel and the environment, a necessary aspect of mechanistic source term (MST) analysis for the KP-FHR is modeling the thermochemistry of molten salts. Provided here is a review of the theory of the thermodynamic principles governing multicomponent phase equilibria, the background of molten salt thermochemistry research, and a summary of the thermochemical data relevant to the KP-FHR coolant salt, Li2BeF4, commonly referred to as "FLiBe". A review of literature is followed by a brief introduction to methods that can be used to model the thermochemical behavior of molten salt mixtures. The methodology outlined is based on the use of a commercial thermodynamic modeling software called FactSage, which is one of only a few available softwares based on the modified quasichemical model (MQM), which is the recommended solution model for molten salts.

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