Grain growth of NpO<sub>2</sub> and UO<sub>2</sub> nanocrystals

Baumann, Viktoria; Popa, Karin; Cologna, Marco; Rivenet, Murielle; Walter, Olaf

doi:10.1039/d3ra00487b

Cited by 3 publications

(1 citation statement)

References 41 publications

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“…In the other case of crystalline powders with a non-orthorhombic lattice, it is necessary to take into account the angles between the axes [9]. In this case, it becomes possible to widely use the BWA method for studying various crystalline powders: other electrode and atmospheric contaminants [47], as well as nuclear fuel and materials [53,54].…”

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confidence: 99%

Using the BWA (Bertaut-Warren-Averbach) Method to Optimize Crystalline Powders Such as LiFePO4

Bobyl,

Konkov,

Faradzheva

et al. 2023

Mathematics

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The average sizes L¯i, and their dispersion Wi along the i-th axis, of crystallites in powders are used to determine X-ray diffraction sizes, Di XRD, averaged over crystallite columns within the BWA method. Numerical calculations have been carried out for an orthorhombic lattice of crystallites, such as LiFePO4, NMC, having a Lamé’s g-type superellipsoid shape. For lognormal distributions, the analytical expression for the normalized coefficient Kn has been found: Kn=Di XRD/L¯i=Kg,0+KgW2, where Kg,0 is a constant at W→0, Kg is a constant depending on the g -type shape. The dependences of Di XRD are also calculated for normal distribution. A fairly simple equation can be obtained as a result of analytical transformations in the framework of experimentally validated approximations. However, a simpler way is to carry out numerical computer calculations with subsequent approximation of the calculated curves. Using the obtained analytical expressions to control technologies from nuclear fuel to cathode materials will improve the efficiency of flexible energy network, especially storage in autonomous and standby power plants.

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mentioning

confidence: 99%

Using the BWA (Bertaut-Warren-Averbach) Method to Optimize Crystalline Powders Such as LiFePO4

Bobyl,

Konkov,

Faradzheva

et al. 2023

Mathematics

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Grain growth of ZnO nanocrystals synthesized in polyol medium with polyvinylpyrrolidone additives

Dobrozhan,

Klymov,

Agouram

et al. 2024

Ceramics International

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Using the BWA (Bertaut-Warren-Averbach) Method to Optimize the Technology of Crystalline Powders such as LiFePO4

Bobyl,

Konkov,

Faradzheva

et al. 2023

Preprint

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The average sizes \ {\bar{L}}_{i\ } and their dispersion W_i along the i-th axis of crystallites in powders are used to determine the X-ray diffraction sizes, D_{i\ XRD}, averaged over crystallite columns within the BWA method. Numerical calculations have been carried out for an orthorhombic lattice of crystallites, such as LiFePO4, NMC, having Lamé's g-type superellipsoid shape. For Lognormal distributions, the analytical expression for the normalized coefficient Kn is found and includes two constants. The first K_{g,0} is a constant at W→0, the second K_g is a constant depending on the g -type shape. The dependences of D_{i\ XRD} are also calculated for Normal distribution. A fairly simple equation can be obtained as a result of analytical transformations in the framework of experimentally validated approximations. However, a simpler way is to carry out numerical computer calculations with subsequent approximation of the calculated curves. Using the obtained analytical expressions to control technologies from nuclear fuel to cathode materials will improve the efficiency of flexible energy network especially storage in autonomous and standby power plants.

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Grain growth of NpO₂ and UO₂ nanocrystals

Abstract: We report on the crystallite growth of nanometric NpO2 and UO2 powders.

Cited by 3 publications

References 41 publications

Using the BWA (Bertaut-Warren-Averbach) Method to Optimize Crystalline Powders Such as LiFePO4

Using the BWA (Bertaut-Warren-Averbach) Method to Optimize Crystalline Powders Such as LiFePO4

Grain growth of ZnO nanocrystals synthesized in polyol medium with polyvinylpyrrolidone additives

Using the BWA (Bertaut-Warren-Averbach) Method to Optimize the Technology of Crystalline Powders such as LiFePO4

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Grain growth of NpO2 and UO2 nanocrystals

Abstract: We report on the crystallite growth of nanometric NpO2 and UO2 powders.

Cited by 3 publications

References 41 publications

Using the BWA (Bertaut-Warren-Averbach) Method to Optimize Crystalline Powders Such as LiFePO4

Using the BWA (Bertaut-Warren-Averbach) Method to Optimize Crystalline Powders Such as LiFePO4

Grain growth of ZnO nanocrystals synthesized in polyol medium with polyvinylpyrrolidone additives

Using the BWA (Bertaut-Warren-Averbach) Method to Optimize the Technology of Crystalline Powders such as LiFePO4

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Grain growth of NpO₂ and UO₂ nanocrystals