Kozlovskiy Artem, Shlimas Dmitriy I, Zdorovets Maxim V, Moskina Aleksandra, Pankratov Vladimir, Popov Anatoli I
Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Nur-Sultan 010000, Kazakhstan.
Laboratory of Solid State Physics, The Institute of Nuclear Physics of Republic of Kazakhstan, Almaty 050032, Kazakhstan.
Nanomaterials (Basel). 2022 Oct 20;12(20):3682. doi: 10.3390/nano12203682.
The paper studies the effect of LiSiO/LiSiO phase formation in lithium-containing ceramics on the strength and thermophysical characteristics of lithium-containing ceramics, which have great prospects for use as blanket materials for tritium propagation. During the phase composition analysis of the studied ceramics using the X-ray diffraction method, it was found that an increase in the lithium component during synthesis leads to the formation of an additional orthorhombic LiSiO phase, and the main phase in ceramics is the monoclinic LiSiO phase. An analysis of the morphological features of the synthesized ceramics showed that an increase in the LiSiO impurity phase leads to ceramic densification and the formation of impurity grains near grain boundaries and joints. During determination of the strength characteristics of the studied ceramics, a positive effect of an increase in the LiSiO impurity phase and dimensional factors on the strengthening and increase in the resistance to external influences during compression of ceramics was established. During tests for resistance to long-term thermal heating, it was found that for two-phase ceramics, the decrease in strength and thermophysical characteristics after 500 h of annealing was less than 5%, which indicates a high resistance and stability of these ceramics in comparison with single-phase orthosilicate ceramics.
本文研究了含锂陶瓷中LiSiO/LiSiO相形成对含锂陶瓷强度和热物理特性的影响，含锂陶瓷作为氚增殖包层材料具有广阔的应用前景。在使用X射线衍射法对所研究陶瓷进行相组成分析时发现，合成过程中锂成分的增加会导致额外正交LiSiO相的形成，且陶瓷中的主相为单斜LiSiO相。对合成陶瓷的形态特征分析表明，LiSiO杂质相的增加会导致陶瓷致密化，并在晶界和结合处附近形成杂质颗粒。在测定所研究陶瓷的强度特性时，确定了LiSiO杂质相和尺寸因素的增加对陶瓷压缩过程中的强化以及对外界影响抵抗力增加的积极作用。在长期热加热抗性测试中发现，对于两相陶瓷，退火500小时后强度和热物理特性的降低小于5%，这表明与单相原硅酸盐陶瓷相比，这些陶瓷具有高抗性和稳定性。
