Fast fabrication of high quality Li2TiO3–Li4SiO4 biphasic ceramic pebbles by microwave sintering: In comparison with conventional sintering

Zeng, Yuanyuan; Chen, Ruichong; Yang, Ming‐Bo; Wang, Hailiang; Guo, Hao; Shi, Yao; Huang, Zhangyi; Qi, Jianqi; Shi, Qiwu; Lu, Tiecheng

doi:10.1016/j.ceramint.2019.06.143

Cited by 18 publications

(9 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…e microwave-sintered samples have smaller grain size and more uniform size distribution and thus have better performance. Here, it is noted that similar results have been reported in TiC [14], Li 2 TiO 3 ceramic [27], Li 2 TiO 3 -Li 4 SiO 4 biphasic ceramic pebbles [28], and other metallic and ceramic materials [23,24].…”

Section: Resultssupporting

confidence: 86%

Effects of Simulation‐Guided Microwave Presintering Process on the Preparation and Final Properties of Pure Ceramic Rings: Lower Sintering Temperature and Higher Mechanical Properties

Xiao

Zhou

Zhao

et al. 2020

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

In order to improve the performance and endurance of steel rings used for twisting and winding yarns in the textile industry, a more wear-resistant ceramic version is studied and examined by conducting multiple simulations combined with microwave sintering experiments of the ring preparation process, aiming to reduce manufacturing costs and improve efficiency. The three-dimensional (3D) electromagnetic field simulation software HFSS is used to simulate the electromagnetic field distribution in the microwave sintering cavity and to determine the electromagnetic region with the most uniform electromagnetic field to guide the microwave sintering experiments. The 3Y-TZP ceramic rings are shaped by gel-casting. The effect of presintering on the performance of ceramic rings is investigated by applying conventional sintering and microwave sintering methods. The experimental results show that the simulation-guided microwave sintering process can resolve the deficiency of uneven microwave sintering at low temperatures. Comparing the final sintering temperatures and mechanical properties of the final ceramic-sintered rings obtained by microwave presintering to those obtained by conventional presintering, microwave presintered sample has a final temperature of 1400°C, which is 100°C lower than that of conventional presintering, which is 1500°C; its average grain size of 0.18 μm is dramatically smaller than that of conventional presintering, which is 0.24 μm, with about 80% of the grain sizes present in the range of 0.1-0.2 μm and a relative density of about 99%, as opposed to conventional presintering’s 70% falling between 0.2 and 0.3 μm and relative density of about 98%; the Vickers hardness and fracture toughness for microwave presintered sample reach 1550 kg·f·mm−2 and 9.05 MPa m1/2, respectively, which are both greater than 1431 kg·f·mm−2 and 8.86 MPa m1/2 in the conventional samples.

show abstract

Section: Resultssupporting

confidence: 86%

Effects of Simulation‐Guided Microwave Presintering Process on the Preparation and Final Properties of Pure Ceramic Rings: Lower Sintering Temperature and Higher Mechanical Properties

Xiao

Zhou

Zhao

et al. 2020

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…Interest in them is due to the possibility of obtaining kinetic curves of the degradation rate, which in the future will make it possible to contribute to the characterization of lithium-containing ceramics for thermonuclear power engineering [21][22][23][24][25]. Also of particular interest is the study of the effect of the presence of two-phase structures on resistance to degradation, since earlier studies indicate that two-phase ceramics have higher strength and durability [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Study of Corrosion Resistance and Degradation Mechanisms in LiTiO2-Li2TiO3 Ceramic

2021

View full text Add to dashboard Cite

The interest in lithium-containing ceramics is due to their huge potential as blanket materials for thermonuclear reactors for the accumulation of tritium. However, an important factor in their use is the preservation of the stability of their strength and structural properties when under the influence of external factors that determine the time frame of their operation. This paper presents the results of a study that investigated the influence of the LiTiO2 phase on the increasing resistance to degradation and corrosion of Li2TiO3 ceramic when exposed to aggressive acidic media. Using the X-ray diffraction method, it was found that an increase in the concentration of LiClO4·3H2O during synthesis leads to the formation of a cubic LiTiO2 phase in the structure as a result of thermal sintering of the samples. During corrosion tests, it was found that the presence of the LiTiO2 phase leads to a decrease in the degradation rate in acidic media by 20–70%, depending on the concentration of the phase. At the same time, and in contrast to the samples of Li2TiO3 ceramics, for which the mechanisms of degradation during a long stay in aggressive media are accompanied by large mass losses, for the samples containing the LiTiO2 phase, the main degradation mechanism is pitting corrosion with the formation of pitting inclusions.

show abstract

“…Up to now, the biphasic Li 4 SiO 4 -Li 2 TiO 3 ceramic pebbles have been fabricated by using the melt spraying method, [20][21][22] the wet-chemical method, 23 the extrusionspheronization method, [24][25][26] and graphite-bed method. 27 Knitter et al reported 28 that the biphasic Li 4 SiO 4 -Li 2 TiO 3 pebbles were fabricated successfully by the melt spraying method, and the crushing load of the pebbles was considerably increased to 12 N via the addition of the excess titanate.…”

Section: Introductionmentioning

confidence: 99%

“…Up to now, the biphasic Li 4 SiO 4 –Li 2 TiO 3 ceramic pebbles have been fabricated by using the melt spraying method, 20‐22 the wet‐chemical method, 23 the extrusion–spheronization method, 24‐26 and graphite‐bed method 27 . Knitter et al.…”

Section: Introductionmentioning

confidence: 99%

Mass fabrication of Li₂TiO₃–Li₄SiO₄ ceramic pebbles with high strength by facile centrifugal granulation method

Tan

Cai

et al. 2023

J Am Ceram Soc.

View full text Add to dashboard Cite

The bi‐phase Li2TiO3–Li4SiO4 ceramic pebbles have been considered a promising breeder to realize the tritium self‐sustainment in the blanket. However, up to now, the reported ceramic pebbles have the disadvantages of low yield, poor crushing load, and loose internal structure, which cannot meet the practical application requirements. In this work, the Li2TiO3–Li4SiO4 ceramic pebbles with excellent mechanical properties were fabricated successfully via the centrifugal granulation method with the assistance of introducing a spray‐drying process, simulating particle trajectory by discrete element software and improving bonding interface between core and shell with ethylene glycol. The composition, microstructure, and inner structure of the Li2TiO3–Li4SiO4 ceramic pebbles were investigated, respectively, through X‐ray diffraction, scanning electron microscopy, transmission electron microscopy, and X‐ray computed tomography (CT). It can be found that the employment of the ethylene glycol solution on the surface of Li2TiO3 can make the core and the shell combine well. Moreover, the effect of the rolling speed of the Li2TiO3–Li4SiO4 ceramic pebbles was investigated via discrete element method (EDEM) simulation and experiments. The experimental results displayed that the Li2TiO3–Li4SiO4 ceramic pebbles sintered at 1100°C for 2 h have a uniform diameter of 1 mm, a good sphericity of 0.97, and an excellent crushing load of 82.4 N, which are superior to those pebbles that obtained by using the traditional wet methods. Moreover, the CT results showed that the appropriate porosity of the core was 3.21% and of the shell was 10.73%. Therefore, the simple centrifugal granulation method can be applied to prepare the Li2TiO3–Li4SiO4 ceramic pebbles in a large scale and shed a light to investigate the relevant advanced biphasic tritium breeder materials in the future.

show abstract

Fast fabrication of high quality Li2TiO3–Li4SiO4 biphasic ceramic pebbles by microwave sintering: In comparison with conventional sintering

Cited by 18 publications

References 29 publications

Effects of Simulation‐Guided Microwave Presintering Process on the Preparation and Final Properties of Pure Ceramic Rings: Lower Sintering Temperature and Higher Mechanical Properties

Effects of Simulation‐Guided Microwave Presintering Process on the Preparation and Final Properties of Pure Ceramic Rings: Lower Sintering Temperature and Higher Mechanical Properties

Study of Corrosion Resistance and Degradation Mechanisms in LiTiO2-Li2TiO3 Ceramic

Mass fabrication of Li₂TiO₃–Li₄SiO₄ ceramic pebbles with high strength by facile centrifugal granulation method

Contact Info

Product

Resources

About

Fast fabrication of high quality Li2TiO3–Li4SiO4 biphasic ceramic pebbles by microwave sintering: In comparison with conventional sintering

Cited by 18 publications

References 29 publications

Effects of Simulation‐Guided Microwave Presintering Process on the Preparation and Final Properties of Pure Ceramic Rings: Lower Sintering Temperature and Higher Mechanical Properties

Effects of Simulation‐Guided Microwave Presintering Process on the Preparation and Final Properties of Pure Ceramic Rings: Lower Sintering Temperature and Higher Mechanical Properties

Study of Corrosion Resistance and Degradation Mechanisms in LiTiO2-Li2TiO3 Ceramic

Mass fabrication of Li2TiO3–Li4SiO4 ceramic pebbles with high strength by facile centrifugal granulation method

Contact Info

Product

Resources

About

Mass fabrication of Li₂TiO₃–Li₄SiO₄ ceramic pebbles with high strength by facile centrifugal granulation method