CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Yichao Gong,Junjie Li,Lin Liu,Lei Xu,Jie Cui,Guojun Zhang,Tiecheng Lu
Improving the lithium density and performance of lithium-based ceramics is the main direction for the development of advanced tritium breeder. In this work, the previously used polymers or organics were replaced by eutectic LiNO 3 –LiCl in wet process for preparing spherical green body, and then Li 4 SiO 4 pebbles were fabricated through molten salt assisted sintering. The eutectic salt used herein was eco-friendly and had little effect on the Li 4 SiO 4 pebbles. Instead, the incorporation of eutectic salt improved the lithium density and sinterability of Li 4 SiO 4 . The prepared Li 4 SiO 4 pebbles exhibited well-grained microstructure, and the grain size increased with the increasing contents of eutectic salt. Compressive tests showed that the crush load increased more than five times when 20 wt% eutectic salt was added. The proposed method may have great prospects in the preparation of tritium breeding materials.
研究领域:
核科学与技术
·
材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Yichao Gong,Junjie Li,Shenghui Yang,Mao Yang,Hao Dang,Yingying Ren,Guojun Zhang,Tiecheng Lu
Investigations on the doping modification of tritium breeding materials have been becoming one of the interesting research areas in the past few years. Recently, preparation method, mechanical and physical properties and tritium release behavior of Li 4+x Si 1-x Al x O 4 solid solution have been studied because of its potential advantages in the field of tritium breeding materials. In this paper, a facile approach was proposed to prepare Li 4+x Si 1-x Al x O 4 pebbles with a relatively small grain. TG/DSC and XRD were conducted to investigate the formation process of Li 4+x Si 1-x Al x O 4 . The results showed the crushing strength and thermal conductivity were obviously improved by introduction of hetero-element Al into Li 4 SiO 4 , and the optimal x value for Li 4+x Si 1-x Al x O 4 was 0.2 from the point of high crushing strength and thermal conductivity. This study will be expected to provide references for fabricating other solid solution tritium breeders.
研究领域:
核能科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Yichao Gong,Zhong Chen,Mao Yang,Hailiang Wang,Chen Dang,Wanxia Huang,Tiecheng Lu
Li 4 SiO 4 has been widely studied as attractive tritium breeding materials due to its innate merits. Considering the potential advantages of nanostructure in tritium breeding materials, a distinctive process was developed to obtain nanostructured Li 4 SiO 4 pebbles. In brief, ultrafine precursor powders were synthesized by solvothermal method without using surfactants , and then indirect wet method was adopted to generate the green spheres with homogeneous microstructure. After that, the suitable sintering conditions were defined by studying the effects of sintering parameters on the grain size evolution, and nanostructured Ti-doped Li 4 SiO 4 pebbles were first obtained by two-step sintering method. This study will be expected to provide references for fabricating other Li-based tritium breeding materials.
研究领域:
核能科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2025
·
IF 3.2
Guangfan Tan,Qilai Zhou,Yasuhisa Oya,Yingchun Zhang,Chang-An Wang,Yanhao Dong
The Li 2 TiO 3 and Li 2 ZrO 3 ceramic pebbles are regarded as promising tritium breeder on account of their superb chemical stability, high tritium diffusion rates, and neutron multiplication potential of Zr, respectively. To integrate the advantages of these two materials, it is necessary to develop a composite such as Li 2 TiO 3 -Li 2 ZrO 3 , which is ideal for advanced fusion reactor designs. Up to now, fabricated biphasic ceramic pebbles generally suffer from low production yield, inadequate crushing load, and high cost, which restricts their application in practice. In this paper, biphasic Li 2 TiO 3 -Li 2 ZrO 3 tritium breeding pebbles with superior crushing strength are successfully fabricated employing the centrifugal granulation method by selecting the appropriate binder and controlling the growth rate. Moreover, by this technique, ceramic pebbles with wide diameter distribution can be obtained, which will help to improve the packing factor of pebble beds in the solid blanket. In addition, the composition, microstructure, and internal structure of the Li 2 TiO 3 -Li 2 ZrO 3 ceramic pebbles are thoroughly analyzed, respectively. The Li 2 TiO 3 -Li 2 ZrO 3 ceramic pebbles, after being sintered at 1100 °C, attained a high sphericity of 0.97, a superior crushing load of 67.6 N, and an optimum porosity of 9.75 % in the shell. Moreover, the Li 2 TiO 3 -Li 2 ZrO 3 ceramic pebbles also exhibit excellent deuterium release properties with the main form of HDO. The above results show that the centrifugal granulation method is not only applicable to the mass production of Li 2 TiO 3 -Li 2 ZrO 3 ceramic pebbles but also to other tritium breeders, which offers promising prospects for the development of advanced tritium breeding materials in the future.
研究领域:
材料科学
·
核工程
·
陶瓷学
·
聚变技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）