Analysis of the reactor experiments results on the study of gas evolution from two-phase Li2TiO3-Li4SiO4 lithium ceramics

Kenzhina, I.; Kulsartov, T.; Knitter, Regina; Chikhray, Y.; Kenzhin, Yergazy; Zaurbekova, Zhanna; Shaimerdenov, A.A.; Ķizāne, Gunta; Zariņš, A.; Kozlovskiy, Artem L.; Габдуллин, М. Т.; Tolenova, A.; Нестеров, Е. А.

doi:10.1016/j.nme.2022.101132

Cited by 7 publications

(7 citation statements)

References 27 publications

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“…However, further analysis of the results of the irradiation experiment, presented in this paper, was due to new information regarding the nature of the release of gases with a mass number of M4, which the authors were able to obtain in later reactor experiments conducted using two-phase lithium ceramics [8].…”

Section: Results Of the Reactor Experimentsmentioning

confidence: 88%

“…In previous works [4][5][6][7], it was assumed that such a peak release of gases with the mass number M4 was due to methodological peculiarities of measurements, and the peak releases themselves were not analyzed (only the lower trend of release was). However, later, in [8,10], it was shown that this release is associated with helium peak releases from ceramics. In these studies, two mass spectrometers were used at selected time intervals in the experiment in order to exclude methodologically determined errors in the measurements.…”

Section: Results Of the Reactor Experimentsmentioning

confidence: 99%

“…Data obtained in experiments using two-phase lithium ceramics [8,10] allowed a new evaluation of the results of the presented experiment using Li2TiO3 + 5 mol% TiO2 ceramics.…”

Section: Analysis Of Helium Release From a Ceramic Pebblementioning

confidence: 98%

“…In this paper, the analysis of tritium and helium release from lithium metatitanate Li 2 TiO 3 during irradiation is considered, taking into account new data regarding the nature of M4 (HT and He) mass release obtained later in reactor experiments using two-phase lithium ceramics Li 4 SiO 4 -Li 2 TiO 3 [8].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Features of Helium and Tritium Release from Li2TiO3 Ceramic Pebbles under Neutron Irradiation

Kulsartov,

Zaurbekova,

Chikhray

et al. 2023

Materials

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The operation of fusion reactors is based on the reaction that occurs when two heavy hydrogen isotopes, deuterium and tritium, combine to form helium and a neutron with an energy of 14.1 MeV D + T → He + n. For this reaction to occur, it is necessary to produce tritium in the facility itself, as tritium is not common in nature. The generation of tritium in the facility is a key function of the breeder blanket. During the operation of a D–T fusion reactor, high-energy tritium is generated as a result of the 6Li(n,α)T reaction in a lithium-containing ceramic material in the breeder blanket. Lithium metatitanate Li2TiO3 is proposed as one of the promising materials for use in the solid breeder blanket of the DEMO reactor. Several concepts for test blanket modules based on lithium ceramics are being developed for testing at the ITER reactor. Lithium metatitanate Li2TiO3 has good tritium release parameters, as well as good thermal and thermomechanical characteristics. The most important property of lithium ceramics Li2TiO3 is its ability to withstand exposure to long-term high-energy radiation at high temperatures and across large temperature gradients. Its inherent thermal stability and chemical inertness are significant advantages in terms of safety concerns. This study was a continuation of research regarding tritium and helium release from lithium metatitanate Li2TiO3 with 96% 6Li during irradiation at the WWR-K research reactor using the vacuum extraction method. As a result of the analysis of experiments regarding the irradiation of lithium metatitanate in vacuum conditions, it has been established that, during irradiation, peak releases of helium from closed pores of the ceramics are observed, which open during the first 7 days of irradiation. The authors assumed that the reasons samples crack are temperature gradients over the ceramic sample, resulting from the internal heating of pebbles under the conditions of their vacuum evacuation, and contact with the bottom of the evacuated capsule. The temperature dependence of the effective diffusion coefficient of tritium in ceramics at the end of irradiation and the parameters of helium effusion were also determined.

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Section: Results Of the Reactor Experimentsmentioning

confidence: 88%

Section: Results Of the Reactor Experimentsmentioning

confidence: 99%

“…Data obtained in experiments using two-phase lithium ceramics [8,10] allowed a new evaluation of the results of the presented experiment using Li2TiO3 + 5 mol% TiO2 ceramics.…”

Section: Analysis Of Helium Release From a Ceramic Pebblementioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Features of Helium and Tritium Release from Li2TiO3 Ceramic Pebbles under Neutron Irradiation

Kulsartov,

Zaurbekova,

Chikhray

et al. 2023

Materials

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“…Furthermore, the focus on ceramics based on lithium metazirconate primarily arises from its exceptional strength properties and its resistance to prolonged mechanical or radiation stress, along with its resistance to thermal expansion and degradation [16][17][18][19][20]. It is essential to emphasize that the objective of this study was not to produce single-phase ceramics but rather to precisely gauge the impact of impurity phases formed during mechanochemical mixing and subsequent thermal sintering on factors such as strength, thermophysical characteristics, thermal stability, and resistance to external influences [21][22][23]. This work is based on the hypothesis that the formation of impurity inclusions makes it possible to create additional barriers in ceramics for the propagation of microcracks under external influences, thereby increasing the strength of ceramics [24,25].…”

Section: Introductionmentioning

confidence: 99%

Effects of Composition Variations on Mechanochemically Synthesized Lithium Metazirconate-Based Ceramics and Their Resistance to External Influences

Abyshev,

Giniyatova,

Kozlovskiy

2023

Ceramics

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The study examines the influence of variations in the compositions of components for the production of lithium-containing ceramics based on lithium metazirconate obtained by the method of mechanochemical grinding and subsequent thermal sintering. For component variation, two compositions were used, consisting of zirconium dioxide (ZrO2) and two distinct types of lithium-containing materials: lithium perchlorate (LiClO4·3H2O) and lithium carbonate (Li2CO3). Adjusting the concentration of these components allowed for the production of two-phase ceramics with varying levels of impurity phases. Using X-ray phase analysis methods, it was determined that the use of LiClO4·3H2O results in the formation of a monoclinic phase, Li2ZrO3, with impurity inclusions in the orthorhombic phase, LiO2. On the other hand, when Li2CO3 is used, the resulting ceramics comprise a mixture of two phases, Li2ZrO3 and Li6Zr2O7. During the studies, it was established that the formation of impurity inclusions in the composition of ceramics leads to an increase in the stability of strength properties with varying mechanical test conditions, as well as stabilization of thermophysical parameters and a decrease in thermal expansion during long-term high-temperature tests. It has been established that in the case of two-phase ceramics Li2ZrO3/Li6Zr2O7 in which the dominance of the Li6Zr2O7 phase is observed during high-temperature mechanical tests, a more pronounced decrease in resistance to cracking is observed, due to thermal expansion of the crystal lattice.

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Modeling of tritium release behavior of biphasic Li2TiO3–Li4SiO4 ceramics

Ran,

Yang,

Zhao

et al. 2024

Ceramics International

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Analysis of the reactor experiments results on the study of gas evolution from two-phase Li2TiO3-Li4SiO4 lithium ceramics

Cited by 7 publications

References 27 publications

Features of Helium and Tritium Release from Li2TiO3 Ceramic Pebbles under Neutron Irradiation

Features of Helium and Tritium Release from Li2TiO3 Ceramic Pebbles under Neutron Irradiation

Effects of Composition Variations on Mechanochemically Synthesized Lithium Metazirconate-Based Ceramics and Their Resistance to External Influences

Modeling of tritium release behavior of biphasic Li2TiO3–Li4SiO4 ceramics

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