Design, synthesis and characterization of the advanced tritium breeder: Li4+xSi1-xAlxO4 ceramics

Zhao, Linjie; Long, Xinggui; Chen, Xiaojun; Xiao, Chengjian; Gong, Yu; Guan, Qiushi; Li, Jiamao; Xie, Lei; Chen, Xiping; Peng, Shuming

doi:10.1016/j.jnucmat.2015.10.010

Cited by 15 publications

(5 citation statements)

References 20 publications

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“…The CO 2 absorption rate of Li 4 SiO 4 material is mainly controlled by the diffusion of ions and CO 2 . Zhao et al [36] reported that solid solution usually formed with the doping of Al 2 O 3 during solid-state preparation, thus increased oxygen vacancies could promote the diffusion in the product layer. Ortiz-Landeros et al [37] reported that Al 2 O 3 addition and ball milling could extend the range of CO 2 absorption temperature.…”

Section: Synthesis Of Li4sio4 Materials With Superior Cyclic Absormentioning

confidence: 99%

Performance of Li4SiO4 Material for CO2 Capture: A Review

Yan

et al. 2019

IJMS

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Lithium silicate (Li4SiO4) material can be applied for CO2 capture in energy production processes, such as hydrogen plants, based on sorption-enhanced reforming and fossil fuel-fired power plants, which has attracted research interests of many researchers. However, CO2 absorption performance of Li4SiO4 material prepared by the traditional solid-state reaction method is unsatisfactory during the absorption/regeneration cycles. Improving CO2 absorption capacity and cyclic stability of Li4SiO4 material is a research highlight during the energy production processes. The state-of-the-art kinetic and quantum mechanical studies on the preparation and CO2 absorption process of Li4SiO4 material are summarized, and the recent studies on the effects of preparation methods, dopants, and operating conditions on CO2 absorption performance of Li4SiO4 material are reviewed. Additionally, potential research thoughts and trends are also suggested.

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Section: Synthesis Of Li4sio4 Materials With Superior Cyclic Absormentioning

confidence: 99%

Performance of Li4SiO4 Material for CO2 Capture: A Review

Yan

et al. 2019

IJMS

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“…To sum up, the moderate amount of Ti doping can improve the mechanical and physical properties and thermal cycling stability of Li 4 SiO 4 . Compared with Al-doped Li 4 SiO 4 [17,19,20], Ti doping plays a more significant role in enhancing crushing strength, whilst Al doping contributes more to the improvement of conductivity. Tritium release experiments conducted by Zhao et al [18] revealed that…”

Section: Thermal Cyclingmentioning

confidence: 99%

“…Neutrons generated from the reaction between deuterium (D) and tritium (T) can react with Li atom to produce tritium, thus achieving tritium self-sustaining of a D-T and hetero-element doped ceramics (notably Li 4+x Si 1-x Al x O 4 and Li 2 Ti 1-x Zr x O 3 ) [17][18][19][20] have been prepared in recent years. Previous studies reported that Al doped lithium orthosilicate exhibited the enhanced crushing strength [17,19,20], thermal and ionic conductivity [17,[20][21][22], and tritium release performance [18]. With respect to fusion reactor maintenance and waste disposal, it is hoped that the elements constituting the tritium breeding material have low neutron activation and short-lived radionuclides.…”

Section: Introduction mentioning

confidence: 99%

A comprehensive study on Li4Si1−xTixO4 ceramics for advanced tritium breeders

Gong

Liu

et al. 2020

J Adv Ceram

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Hetero-element doped lithium orthosilicates have been considered as advanced tritium breeders due to the superior performances. In this work, Li4Si1−xTixO4 ceramics were prepared by proprietary hydrothermal process and multistage reactive sintering. The reaction mechanism of Li4Si1−xTixO4 was put forward. XRD and SEM analyses indicate that insertion of Ti leads to lattice expansion, which promotes the grain growth and changes the fracture mode. The compressive tests show that the crush load increases almost four times by increasing x from 0 to 0.2. However, the thermal conductivity and ionic conductivity are the best when x = 0.05 and x = 0.1, respectively. Thermal cycling stability of Li4Si1−xTixO4 pebbles was further appraised through investigating the changes of microstructure and crush load. After undergoing thermal cycling, the Li4Si1−xTixO4 still show higher crush load compared with Li4SiO4, despite Ti segregation in some samples. The x = 0.05 sample exhibits excellent thermal cycling stability. In summary, proper amount of Ti doping can improve the crush load, thermal and ionic conductivity, and thermal cycling stability of Li4SiO4.

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“…Since many factors can affect the strength, such as grain size, porosity, pore size and distribution, sphericity, the content and size of second-phases, humidity, etc., the variation in strength with thermal cycling periods is irregular. [17,19,20], Ti doping plays a more significant role in enhancing crushing strength, whilst Al doping contributes more to the the improvement of conductivity. x = 0 4.512×10 6 1.91×10 -3 1.5592×10 -4 2.715×10 -6 x = 0.05 4.365×10 6 2.71×10 -3 1.5562×10 -4 3.990×10 -6 x = 0.1 1.003×10 6 2.64×10 -3 1.5562×10 -4 1.6914×10 -5 x = 0.2 3.506×10 6 2.70×10 -3 1.5851×10 -4 4.858×10 -6…”

Section: Thermal Cyclingmentioning

confidence: 99%

“…However, the overall performance of conventional lithium ceramics (i.e. Li [7][8][9], mixed-phase ceramics represented by Li 2 TiO 3 /Li 4 SiO 4 [10][11][12][13], oxides modified ceramics [14][15][16] and hetero-element doped ceramics (notably Li 4+x Si 1-x Al x O 4 ) were prepared in recent years [17][18][19][20]. And previous studies have shown that Al doped lithium orthosilicate exhibits the enhanced crushing strength [17,19,20], thermal and ionic conductivity [17,[20][21][22], and tritium release performance [18].…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Study on Li4si1-xtixo4 Ceramics for Advanced Tritium Breeders

Gong

Liu

et al. 2020

Preprint

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Hetero-elements doped lithium orthosilicate has been considered as advanced tritium breeders due to its superior performances. In this work, Li4Si1-xTixO4 ceramics were prepared by proprietary hydrothermal process and multistage sintering. The reaction mechanism of Li4Si1-xTixO4 was put forward. XRD and SEM analyses indicate that insertion of Ti leads to lattice expansion, enhances the sinterability and changes the fracture mode. The compressive tests show that the crush load increases almost four times by increasing x from 0 to 0.2. However, the thermal conductivity and ionic conductivity are the best when x=0.05 and x=0.1, respectively. Thermal cycling stability of Li4Si1-xTixO4 pebbles was further appraised through investigating the changes of microstructure and crush load. After undergoing thermal cycling, the Li4Si1-xTixO4 still show higher crush load compared with Li4SiO4, despite Ti segregation in some samples. The x=0.05 sample exhibits excellent thermal cycling stability. To be sure, Ti doping improves the overall performance of Li4SiO4.

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Design, synthesis and characterization of the advanced tritium breeder: Li4+xSi1-xAlxO4 ceramics

Cited by 15 publications

References 20 publications

Performance of Li4SiO4 Material for CO2 Capture: A Review

Performance of Li4SiO4 Material for CO2 Capture: A Review

A comprehensive study on Li4Si1−xTixO4 ceramics for advanced tritium breeders

A Comprehensive Study on Li4si1-xtixo4 Ceramics for Advanced Tritium Breeders

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