CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiamei Xu,Zijian Su,Jicheng Liu,Kun Lin,Yuanbo Zhang
With the improvement of industrial production requirements, the thermal shock resistance (TSR) of the materials used in industrial kilns plays a crucial role in ensuring efficient production. Aluminum-based heat storage ceramic balls (HSCB) are widely used in high-temperature industrial kilns, but they have a problem of weak TSR. A similar situation existed in the HSCB with corundum and Mg-Al spinel phases in our previous research. In this study, corundum-spinel-mullite HSCB was prepared using pre-treated secondary aluminum dross (SAD) as the main material at low roasting temperature. The effects of mullite content on the mechanical properties and microstructure of the HSCB were studied. Mullite whiskers were cross-distributed with corundum and Mg-Al spinel, which benefited the TSR. With the increase of mullite content, the structure of the HSCB gradually became loosely, the TSR increased and then decreased slightly, and linear crack density increased. When mullite content was about 25 %, the comprehensive performance of HSCB performed perfectly. Under the optimal conditions, the coefficient of thermal expansion of the HSCB was only 5.70 × 10 −6 K −1 , the thermal conductivity reached 3.35 W/(m·K) and the TSR was 34 times. This study aimed to provide a theoretical reference for the preparation of aluminum-based ceramic HSCB, as well as to improve the high-value utilization of SAD.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FUSION ENERGY
·
2025
·Vol. 44
·期 1
·1-14
·
IF 2.1
Hu Xin,Tan Guangfan,Cai Liang,Yi Biao,Xu Dajun,Gao Zeyu,Dong Xiaoxu,Li Yusha,Zhang Yingchun
In order to meet the huge demand for millimetre-sized Li 2 TiO 3 ceramic pebbles for future fusion reactors, the aim of this work was to develop a combination of microfluidic and UV curing techniques to greatly improve the preparation efficiency. By employing a cross-junction microfluidic device, large-sized droplets were controllably generated and subsequently subjected to in-situ UV curing, enabling rapid solidification of resin-based ceramic slurries. Systematic investigations revealed critical processing parameters: (1) The rheological behavior of ceramic slurries was governed by solid content and dispersant concentration, directly influencing droplet stability during microfluidic manipulation. (2) UV curing efficacy depended on exposure time(10 ~ 40 s), aging time (30 ~ 120 s) and solid content, and the optimised conditions allow complete cross-linking of 2 mm green pebbles. (3) Post-sintering at an ultra-low heating rate (0.5 °C/min) produced Li 2 TiO 3 ceramic pebbles with a relatively dense microstructure and high crush load(42 N).This microfluidic and UV curing strategy demonstrates potential process controllability and scalability.
研究领域:
材料科学
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核能工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 103
·期 10
·5612-5623
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IF 3.502
Ruichong Chen,Jianqi Qi,Qiwu Shi,Yanli Shi,Hailiang Wang,Hao Guo,Yuanyuan Zeng,Mao Yang,Zhijun Liao,Tiecheng Lu
This paper gives an oil-based granulation approach to realize the efficient preparation of Li 2 O breeder materials, which solve the problems of long preparation cycle, high manufacturing cost and difficult to be homogenization and densification in the past. Li 2 O precursor spheres with narrow size distribution and uniform spherical shape can be obtained using paraffin oil as binders. The Li 2 O feed powder with bimodal size distribution will self-organize to form a core-shell structured sphere during granulation, in which the core and shell are composed of small particles and large particles, respectively. Notably, the Li 2 O ceramic spheres sintered at 900°C can achieve a crush load of 40.69 ± 4.01 N and a theoretical density of 79.66% TD, which was not achievable by the methods reported in the previous literature. The strategy proposed in this work not only can be easily extended to other material systems but also opens up a new avenue for the design and preparation of tritium breeder materials with uniform size distribution and satisfactory mechanical properties.
研究领域:
材料科学
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核能工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2024
·Vol. 21
·期 6
·3842-3850
·
IF 1.8
Zhen-Quan Liang,Jia-Ji Liang,Jun-Jie Yu,Pei-Bin Cai,Wei-Ming Guo,Hua-Tay Lin
Spark plasma sintering (SPS) is an ultrafast sintering method for the preparation of ceramics and ceramic composites with simple geometrical shapes, with the combined application of uniaxial pressure. This study aims to propose an SPS densification method for Si 3 N 4 ceramic balls without necessitating alterations to tools and equipment. The Si 3 N 4 ceramic balls intended for sintering are positioned within a SiC powder bed inside the conventional die used in SPS. The study systematically investigates the effects of presintering temperature (1400°C, 1500°C, and 1600°C) and SPS temperature (1600°C, 1700°C, and 1800°C) on the sphericity, relative density, phase composition, microstructure, and mechanical properties of Si 3 N 4 ceramic balls. Experimental findings reveal that Si 3 N 4 ceramic balls exhibiting an optimal combination of sphericity (0.94 ± 0.02), relative density (98.4%), and mechanical properties (Vickers hardness: 17.5 ± 0.4 GPa, fracture toughness: 6.4 ± 0.1 MPa·m 1/2 ) were successfully achieved at a pre-sintering temperature and SPS temperature of 1600°C, coupled with the use of a SiC powder bed and SPS method. Consequently, the SPS method demonstrates its capability to fabricate Si 3 N 4 ceramic balls with excellent performance.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2021
·Vol. 104
·期 8
·3855-3861
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IF 3.784
Jun Chen,Wan-Qing Xue,Chang-Ming Xu,Pai-Feng Luo,Ji-Gui Cheng,Ying-Wei Lu
Monodisperse ZrO 2 ceramic beads with size larger than 1 mm have been prepared by an improved micro-droplet spray forming process, through which a compressor and a dispenser were employed to produce droplets continuously. Furthermore, the slurry recipe and drying temperature have been optimized to enhance the sphericity and smoothness of the beads. The sintered ZrO 2 ceramic beads present promising mechanical performance, including a relative density of 84.6%, a crush strength of 256.2 ± 36.6 N as well as a Vickers hardness of 1344.4 ± 58.3 HV. Such procedure reveals great potential in mass production of ceramic beads.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Ruichong Chen,Mao Yang,Yanli Shi,Hailiang Wang,Hao Guo,Yuanyuan Zeng,Jianqi Qi,Qiwu Shi,Zhijun Liao,Tiecheng Lu
In this study, Li 2 O porous ceramic pebbles were synthesized by decomposing the xLi 2 CO 3 -yLiNO 3 precursor pebbles at low temperature. This efficient decomposition reaction was mainly attributed to the two-stage support decomposition of Li 2 CO 3 and LiNO 3 . The results indicated that the molar ratio of Li 2 CO 3 and LiNO 3 will directly affect the phase composition , pore structure and crush load of sintered pebbles. The high-purity Li 2 O ceramic pebbles sintered from Li 2 CO 3 –LiNO 3 precursor pebbles at 730 °C exhibits the open porosity of 24.8 ± 0.7%. The crush load of the ceramic reaches 21.18 ± 1.38 N although the structure was porous. The Li 2 O porous ceramics fabricated in this study will have potential application in tritium breeder materials.
研究领域:
材料科学
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核能工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 4
·1959
·
IF 4.9
Xiaobo Yang,Lingli Yu,Shuqi Chen,Miaochang Liu,Qian Miao,Huayue Wu,Wenxia Gao
A citric acid cross-linked β-cyclodextrin (β-CD) polymer was synthesized and loaded on micro-ceramic balls to fabricate the solid-phase adsorbents (P-MCB) for adsorption and extraction of triazole pesticides from water. The stability of β-CD polymer and P-MCB was investigated in solutions with different pH values at different temperatures. The adsorption properties and the influence of kinetics, sorbent amount, pesticide concentration, and temperature on the adsorption capacity were evaluated. The results showed P-MCB had favorable adsorption of 15.98 mg/g flutriafol in 3.5 h. The equilibrium data followed the Freundlich equation, and the adsorption of flutriafol and diniconazole followed the second-order kinetics. The recovery rate of P-MCB for triazole pesticides in water was satisfactory, and the recovery rate was still 80.1%, even at the 10th cycle. The P-MCB had good stability, with a degradation rate of 0.2% ± 0.08 within 10 days, which could ensure extraction and recycling.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yuanbo Zhang,Jiamei Xu,Jicheng Liu,Kun Lin,Zijian Su
Secondary aluminum dross (SAD) is a kind of hazardous waste with high aluminum content produced in the aluminum industry. From another point, SAD is also considered as a valuable aluminum resource, which can be used as high-quality raw material for value-added products such as refractory materials . In this study, a novel route for preparing corundum-spinel heat storage spheres (HSS) using washed residue of secondary aluminum dross (WSAD) as the main raw material was proposed. FactSage 8.1 software was used for the detailed thermodynamic calculation, which provided accurate theoretical guidance for the actual synthesis experiments. The effects of roasting temperature and formula on the main phases, compressive strength , porosity, and bulk density of HSS were systematically analyzed. The strengthening mechanism of the liquid phase on the sintering strength was revealed. The results showed that the HSS with good properties could be obtained with 90 wt% WSAD, 10 wt% kaolin, and 1 wt% bentonite. The HSS mainly consisted of corundum and spinel phases. The synthetic temperature of corundum-spinel ceramic was reduced by more than 200 °C. This study provides a novel way for value-added utilization of SAD as well as realizing the deep detoxification and the removal of nitrogen of it.
研究领域:
材料科学
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环境工程
·
冶金工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2019
·
IF 2.547
Ruichong Chen,Mao Yang,Yanli Shi,Hailiang Wang,Hao Guo,Yuanyuan Zeng,Jianqi Qi,Qiwu Shi,Zhijun Liao,Tiecheng Lu
An advanced core-shell ceramic pebble with Li 4 TiO 4 pure phase core and Li 2 TiO 3 nanostructured shell was prepared by a physical coating method. The phase compositions, morphology and microstructure of Li 4 TiO 4 –Li 2 TiO 3 core-shell ceramic pebbles were investigated. We discovered that using chitosan solution to assist rolling coating helps to improve the coating uniformity of core-shell green pebbles. In addition, the results show that the obtained Li 4 TiO 4 –Li 2 TiO 3 core-shell ceramic pebbles have a diameter of ∼1.1 mm, the shell thickness of ∼13 μm and density of 2.31 ± 0.03 g/cm 3 . It is also noted that the Li 2 TiO 3 shell still maintains the nanostructure (∼80 nm) after sintering. This study provides a feasible method for preparing Li 4 TiO 4 –Li 2 TiO 3 core-shell ceramic pebbles which have a great potential application for the test blanket module (TBM) of International Thermonuclear Experimental Reactor (ITER).
研究领域:
材料科学
·
核工程
·
陶瓷
✓ 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）