Low-temperature synthesis of Li2TiO3 tritium breeder ceramic pebbles by water controlled-release solvothermal process

Tan, Guangfan; Xu, Dajun; Tu, Wenrui; Gu, Hailan; Ren, Yan; Hu, Xin; Cai, Liang; Song, Shenhua; Li, Yusha; Shen, Zhen; Wan, Li; Zhang, Yingchun

doi:10.1016/j.apt.2021.04.010

Cited by 9 publications

(9 citation statements)

References 34 publications

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“…Besides, the grain size was estimated by the Scherrer formula without considering the effect of stress as Formula () 25

\begin{equation} D=\frac{K\gamma}{\beta \cos \theta} \end{equation}

…”

Section: Resultsmentioning

confidence: 99%

“…To present a promising method for tritium breeding in the future, an in‐depth comparison of the ceramic breeder is made between the Li 2 TiO 3 fabricated via the water‐based sol–gel method and the Li 2 TiO 3 fabricated in the previously reported. Up to now, many methods such as the solid‐state method, 28 sol–gel method, 29 nonhydrolytic sol–gel method, 19 solution combustion method, 11 an improved solvothermal method, 25 and hydrothermal method 30 were used to fabricate Li 2 TiO 3 powder. Moreover, to prevent the ceramic pebbles from breaking up and blocking the tritium release channel, the Li 2 TiO 3 ceramic pebbles should have higher crushing load and relative density.…”

Section: Resultsmentioning

confidence: 99%

“…Besides, the grain size was estimated by the Scherrer formula without considering the effect of stress as Formula (3). 25…”

Section: Effect Of Calcining Temperature On Powdersmentioning

confidence: 99%

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Preparation and characterization of Li₂TiO₃ ceramic pebbles by modification of the water‐based sol–gel method

Wan

Tan

Cai

et al. 2023

Int J Applied Ceramic Tech

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Li 2 TiO 3 is considered as one of the best candidates for breeding materials. This article adopted a modification water-based sol-gel method to synthesize nano-Li 2 TiO 3 powders, which overcomes the poor phase purity, coarse grain, and inferior crushing strength described in the previous literature. In this paper, the thermal effect of the precursor, the crystal phase, and the morphology of the powders were characterized by thermogravimetric analysis/differential thermal analysis (TG/DTA), X-ray diffraction (XRD), and transmission electron microscopy (TEM) techniques. The nano-structured Li 2 TiO 3 powders with good dispersion and an average particle size of 20-50 nm were successfully synthesized at 600 • C by controlling PH and hydrolysis rate. Moreover, the phase transition temperature for the monoclinic phase β-Li 2 TiO 3 was as low as 600 • C, which is lower than 750 • C using the traditional solid-state method. Meanwhile, the morphology, porosity, crushing load, and thermal conductivity of ceramic pebbles are characterized systematically by using scanning electron microscope (SEM), mercury injection meter, compression strength equipment, and laser scattering method, respectively. Experimental results showed that the Li 2 TiO 3 ceramic pebbles with a sphericity of .98, crush load of 48.4 N, and relative density of 90.03 % were successfully prepared at 1050 • C for 2 h. This method will provide new guidance for the preparation of tritium breeders.

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“…Besides, the grain size was estimated by the Scherrer formula without considering the effect of stress as Formula () 25

\begin{equation} D=\frac{K\gamma}{\beta \cos \theta} \end{equation}

…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and characterization of Li₂TiO₃ ceramic pebbles by modification of the water‐based sol–gel method

Wan

Tan

Cai

et al. 2023

Int J Applied Ceramic Tech

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“…The specific preparation process has been introduced in our previous study. 23 To prevent the slurry droplets from overlapping, the silicone oil container was rotated at a certain speed on the rotating disc. The schematic image of the Li 2 TiO 3 pebbles was given in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

“…Finally, the slurry was dropped dropwise into the hot silicone oil through multiple nozzles, where green pebbles were generated due to gravity and surface tension. The specific preparation process has been introduced in our previous study 23 . To prevent the slurry droplets from overlapping, the silicone oil container was rotated at a certain speed on the rotating disc.…”

Section: Methodsmentioning

confidence: 99%

Study on the chemical compatibility between Li₂TiO₃ ceramic pebbles and diverse advanced structural materials

Tan

Cai

et al. 2023

Int J Applied Ceramic Tech

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The tritium breeder and structural materials are necessary components in the blanket to realize tritium (T) self‐sustainment of nuclear fusion. The long‐term exposure between tritium breeders and structural materials will cause surface corrosion in irradiation environments and then further affect the tritium release behavior. In this study, chemical compatibility between Li2TiO3 ceramic pebbles and advanced structural materials was studied systematically at 700 °C for 300 h under He+0.1 % H2 environment, respectively. The color of the Li2TiO3 ceramic pebbles changes from white to dark grey and black. Moreover, the grain size of Li2TiO3 ceramic pebbles increases to more than 5 μm, and the crushing load decreased slightly. For the structural materials, the Al‐rich oxide layer with about 188.7 nm of 14Cr‐5Al oxide dispersion strengthened (ODS) steel and Cr‐Fe rich oxide layer with about 1.04 μm of 14Cr‐ODS steel were observed on the cross‐section. The effective diffusion coefficient of O element in Li2TiO3 ceramic moved into ODS steel at 700 °C was calculated to be 3.3 × 10−16cm2/s and 1.02 × 10−14 cm2/s. Unfortunately, when SiC ceramics were contacted with the pebbles, the crystal phase transformed into SiO2, which severely limits its application. Therefore, these results will provide guidance for the selection of structural materials in the future.

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Stereolithography and gelcasting of Li2TiO3 block breeders with a Gyroid structure: Slurry optimization and performance evaluation

Chen,

Zhou,

Cao

et al. 2024

Journal of the European Ceramic Society

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Low-temperature synthesis of Li2TiO3 tritium breeder ceramic pebbles by water controlled-release solvothermal process

Cited by 9 publications

References 34 publications

Preparation and characterization of Li₂TiO₃ ceramic pebbles by modification of the water‐based sol–gel method

Preparation and characterization of Li₂TiO₃ ceramic pebbles by modification of the water‐based sol–gel method

Study on the chemical compatibility between Li₂TiO₃ ceramic pebbles and diverse advanced structural materials

Stereolithography and gelcasting of Li2TiO3 block breeders with a Gyroid structure: Slurry optimization and performance evaluation

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Low-temperature synthesis of Li2TiO3 tritium breeder ceramic pebbles by water controlled-release solvothermal process

Cited by 9 publications

References 34 publications

Preparation and characterization of Li2TiO3 ceramic pebbles by modification of the water‐based sol–gel method

Preparation and characterization of Li2TiO3 ceramic pebbles by modification of the water‐based sol–gel method

Study on the chemical compatibility between Li2TiO3 ceramic pebbles and diverse advanced structural materials

Stereolithography and gelcasting of Li2TiO3 block breeders with a Gyroid structure: Slurry optimization and performance evaluation

Contact Info

Product

Resources

About

Preparation and characterization of Li₂TiO₃ ceramic pebbles by modification of the water‐based sol–gel method

Preparation and characterization of Li₂TiO₃ ceramic pebbles by modification of the water‐based sol–gel method

Study on the chemical compatibility between Li₂TiO₃ ceramic pebbles and diverse advanced structural materials