A critical review of Li2O ceramic breeder material properties correlations and data

Donato, A.

doi:10.1016/s0920-3796(97)00123-3

Cited by 30 publications

(12 citation statements)

References 32 publications

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“…Lithium oxide, Li 2 O, is a leading contender for use as a blanket breeding material in future nuclear fusion reactors [591,592], its purpose being to convert energetic neutrons to usable heat, and breed the tritium necessary to sustain the D-T reaction ( 6 3 Li + 1 0 n → 4 2 He + 3 1 T ). The principal advantages of Li 2 O for this role lie in its relatively high melting temperature (T m = 1705 K) and its impressive lithium density, which exceeds that of lithium metal by a factor of around two.…”

Section: The Effect Of Ionic Size: Anti-fluorite LI 2 Omentioning

confidence: 99%

Superionics: crystal structures and conduction processes

2004

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Superionic conductors are compounds that exhibit exceptionally high values of ionic conductivity within the solid state. Indeed, their conductivities often reach values of the order of 1 −1 cm −1 , which are comparable to those observed in the molten state. Following Faraday's first observation of high ionic conductivity within the solids β-PbF 2 and Ag 2 S in 1836, a fundamental understanding of the nature of the superionic state has provided one of the major challenges in the field of condensed matter science. However, experimental and theoretical approaches to their study are often made difficult by the extensive dynamic structural disorder which characterizes superionic conduction and the inapplicability of many of the commonly used approximations in solid state physics. Nevertheless, a clearer picture of the nature of the superionic state at the ionic level has emerged within the past few decades. Many different techniques have contributed to these advances, but the most significant insights have been provided by neutron scattering experiments and molecular dynamics simulations. This review will summarize the state of current knowledge concerning the crystal structures and conduction processes of superionic conductors, beginning with a comparison of the behaviour of two of the most widely studied binary compounds, AgI and β-PbF 2 . Each can be considered a parent of two larger families of highly conducting compounds which are related by either chemical or structural means. These include perovskite-structured oxides and Li + containing spinel-structured compounds, which have important commercial applications in fuel cells and lightweight batteries, respectively. In parallel with these discussions, the relative importance of factors such as bonding character and the properties of the mobile and immobile ions (charge, size, polarizability, etc) in promoting the extensive lattice disorder which characterizes superionic behaviour will be assessed and the possibilities for predicting a priori which compounds will display high ionic conductivity discussed.

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Section: The Effect Of Ionic Size: Anti-fluorite LI 2 Omentioning

confidence: 99%

Superionics: crystal structures and conduction processes

2004

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“…Among the candidate breeders of Li-containing oxides, Li 2 O is the most widely investigated. Many experimental and theoretical studies have focused on the creation and annihilation of the radiation defects induced by neutron irradiation and the diffusivity of bred tritium, which would interact with these defects [3][4][5][6][7][8][9][10][11][12]. However, in most studies, the interaction of tritium with radiation defects has simply been deduced from the tritium diffusivity or release rate, and definitive interactions with specific defects have not been clarified.…”

Section: Introductionmentioning

confidence: 99%

Existence states of deuterium irradiated into LiAlO2

Luo¹,

Oda²,

Oya³

et al. 2008

Journal of Nuclear Materials

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“…Lithium oxide (Li 2 O) is a candidate material for a solid breeder, and many experimental studies have focused on the influence of radiation defects on hydrogen isotope behavior in Li 2 O [1]. Among various radiation defects, Li vacancies and F centers have attracted considerable attention, because the former are extensively generated via the tritium breeding reaction and the latter are recognized to strongly affect the stability [2,3] and the charge state [4][5][6] of tritium.…”

Section: Introductionmentioning

confidence: 99%