Li vaporization properties of candidate materials for tritium breeder with high Li density

Shin-mura, Kiyoto; Otani, Yu; Ogawa, Shota; Hoshino, Tsuyoshi; Sasaki, Kazuya

doi:10.1016/j.fusengdes.2017.04.053

Cited by 9 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In particular, the reduction of Li density caused by long-term heating under operating conditions has always been a research hotspot in the eld of breeding materials. For this reason, we will comparatively study the evolution of Li density with heating time in a 900 °C H 2 /Ar atmosphere of core-shell pebbles and other breeding materials [32,33]. In order to be uni ed with other studies, the theoretical lithium density is used for comparison.…”

Section: (B) and (D))mentioning

confidence: 99%

Mass Transfer Behavior and Microstructure Evolution of Li4TiO4-Li2TiO3 Core-shell Breeding Ceramic Under Harsh Operating Conditions

Chen

Katayama

et al. 2021

Preprint

View full text Add to dashboard Cite

The development of novel tritium breeding materials was urgently needed in order to continuously optimize the tritium breeding ratio (TBR) of thermonuclear fusion reactors. From this point of view, Li4TiO4-Li2TiO3 core-shell breeding materials with more reasonable structure and theoretical Li density of 0.464 g/cm3 were prepared in this work. Notably, the mass transfer experiment at 900 °C in 1% H2/Ar shows that the theoretical Li density of this core-shell material after heating for 30 days was significantly higher than that of other breeding materials, indicating that it can provide more stable and efficient TBR. Specifically, the Li mass loss of the sample after 30 days heating was 3.4%, resulting in a decrease of Li density to 0.415 g/cm3. The mechanism of Li mass loss in Li4TiO4-Li2TiO3 core-shell breeding materials was investigated in detail. Moreover, the samples did not crack or collapse during the long-term heating process, and always maintained a satisfactory crushing load, revealing that this core-shell breeding ceramic can be used for a long time under severe operating conditions.

show abstract

Section: (B) and (D))mentioning

confidence: 99%

Mass Transfer Behavior and Microstructure Evolution of Li4TiO4-Li2TiO3 Core-shell Breeding Ceramic Under Harsh Operating Conditions

Chen

Katayama

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Figure 7 compares the evolution of Li density with heating time for Li 4 TiO 4 -Li 2 TiO 3 core-shell pebbles and other breeding materials in a 900 • C 1% H 2 /Ar atmosphere. 25,26 For consistency with other studies, the theoretical Li density was used for comparison. The theoretical Li density of Li 4 TiO 4 -Li 2 TiO 3 core-shell pebbles was calculated by the following equation:…”

mentioning

confidence: 99%

Long‐term thermal stability of Li₄TiO₄–Li₂TiO₃ core–shell breeding pebbles under continuous heating in H₂/Ar atmosphere

Chen

Ipponsugi

Oyama

et al. 2023

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

The long‐term thermal stability of tritium breeding materials during service is a key factor to ensure efficient tritium release. In this study, the long‐term thermal stability of advanced Li4TiO4–Li2TiO3 core–shell breeding pebbles under continuous heating in 1%H2/Ar at 900°C was investigated for the first time. The results show that this core–shell material loses 3.4% Li mass after heating for 30 days, resulting in a reduction in Li density to .415 g/cm3, which is still significantly higher than other breeding materials. The moisture in the sample bed will determine the form of Li volatilization and thus affect the rate of Li mass loss. The core–shell pebbles maintain favorable phase stability during long‐term heating, and the grain sizes of the Li2TO3 shell and Li4TiO4 core after 30 days of heating are 6.5 ± 1.5 and 6.9 ± 2.5 μm, respectively. Moreover, the samples did not crack or collapse during long‐term heating and still had a satisfactory crushing strength of 37.61 ± 7.13 N after 30 days of heating. Overall, the high Li density and good thermal stability during long‐term heating demonstrate that the Li4TiO4–Li2TiO3 core–shell breeding pebbles are a very reliable tritium breeding material for long‐term service under harsh operating conditions.

show abstract

“…Existen varias cerámicas (por ejemplo: Li4SiO4, Li2TiO3 y Li8ZrO6) bien caracterizadas [74,100,112] por medio de estudios sobre producción y liberación del tritio [75,115] incluyendo "in-pile tests" [78,83,115] Discutiremos varias opciones que cumplen con el requisito (vii) con Li2TiO3. A pesar de que esta cerámica no tiene una alta densidad atómica de litio en comparación con otras opciones, es una cerámica equilibrada que cumple razonablemente bien la lista de requisitos y se comporta particularmente bien con respecto a la liberación y activación de tritio [7].…”

Section: Materiales Cerámicos De Críaunclassified

“…Sin embargo, a partir del trabajo de Peeters et al [79], podemos estimar que la porosidad abierta esperada para esta densidad es ~14%, un valor bastante aceptable para asegurar la liberación de tritio. Para estimar el rango de temperatura de operación en el que el Li2TiO3 cumple la lista de requisitos, debemos considerar no solo las condiciones para preservar la microestructura [112] (porosidad y tamaño de grano, que acabamos de comentar), sino también los efectos perjudiciales relacionados con la evaporación del Li [115] y los problemas relacionadas con la liberación de tritio a temperaturas demasiado altas, así como, la acumulación de defectos (trampas para tritio) a temperaturas demasiado bajas [113]. En este trabajo, Kobayashi et al demostraron que a temperaturas superiores a 600 K, la eliminación del tritio de los defectos es eficaz, a la vez que la difusión de tritio es alta para muestras con tamaño de grano pequeño (<100 nm).…”

Section: Materiales Cerámicos De Críaunclassified

“…Con respecto a estudios con tritio, no se ha estudiado tan extensamente como Li2TiO3. Shin-mura et al estudiaron su estabilidad térmica [115], observando pérdida de Li y descomposición en dos fases a 1173 K. Estos autores propusieron [116] el uso de Li5AlO4 para estabilizar al Li8ZrO6. La combinación de ambas cerámicas al calentar conduce a un sistema de 4 fases más estable.…”

Section: Materiales Cerámicos De Críaunclassified

See 1 more Smart Citation

Sistema para frenado de neutrones y reproducción de tritio en plantas de fusión nuclear por confinamiento inercial

Rodríguez¹

View full text Add to dashboard Cite

Li vaporization properties of candidate materials for tritium breeder with high Li density

Cited by 9 publications

References 13 publications

Mass Transfer Behavior and Microstructure Evolution of Li4TiO4-Li2TiO3 Core-shell Breeding Ceramic Under Harsh Operating Conditions

Mass Transfer Behavior and Microstructure Evolution of Li4TiO4-Li2TiO3 Core-shell Breeding Ceramic Under Harsh Operating Conditions

Long‐term thermal stability of Li₄TiO₄–Li₂TiO₃ core–shell breeding pebbles under continuous heating in H₂/Ar atmosphere

Sistema para frenado de neutrones y reproducción de tritio en plantas de fusión nuclear por confinamiento inercial

Contact Info

Product

Resources

About

Li vaporization properties of candidate materials for tritium breeder with high Li density

Cited by 9 publications

References 13 publications

Mass Transfer Behavior and Microstructure Evolution of Li4TiO4-Li2TiO3 Core-shell Breeding Ceramic Under Harsh Operating Conditions

Mass Transfer Behavior and Microstructure Evolution of Li4TiO4-Li2TiO3 Core-shell Breeding Ceramic Under Harsh Operating Conditions

Long‐term thermal stability of Li4TiO4–Li2TiO3 core–shell breeding pebbles under continuous heating in H2/Ar atmosphere

Sistema para frenado de neutrones y reproducción de tritio en plantas de fusión nuclear por confinamiento inercial

Contact Info

Product

Resources

About

Long‐term thermal stability of Li₄TiO₄–Li₂TiO₃ core–shell breeding pebbles under continuous heating in H₂/Ar atmosphere