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Research Article
Yichao Gong
Xi'an University of Technology
Corresponding Author
ORCiD: https://orcid.org/0000-0002-8888-9312
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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.
Keywords
Tritium breeders, Li4Si1-xTixO4, Thermal conductivity, Ionic conductivity, Thermal cycling
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This preprint is under consideration at Journal of Advanced Ceramics. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Yichao Gong
Xi'an University of Technology
Corresponding Author
ORCiD: https://orcid.org/0000-0002-8888-9312
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 10 Jun, 2020
No community comments so far
First submitted
On 08 Jun, 2020
Editor assigned
On 08 Jun, 2020
Submission checks complete
On 07 Jun, 2020
Editor invited
On 07 Jun, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Materials Engineering
License:
This work is licensed under a CC BY 4.0 License. Read Full License
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.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
The full text of this article is available to read as a PDF.
This is a list of supplementary files associated with this preprint. Click to download.
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