POWDER TECHNOLOGY
·
2021
·
IF 5.134
Jun Chen,Hao Yang,Chang-Ming Xu,Ji-Gui Cheng,Ying-Wei Lu
Zirconia microspheres with high sphericity and hardness were successfully massively produced through a cost-effective spray granulation method by using an optimized slurry with high solid content and low viscosity which was formulated with a mixed dispersant . The influence of slurry solid content, binder addition as well as drying temperature on the shape and size of the sintered microspheres were studied. Furthermore, the formation mechanism of different granulated particles was analyzed based on the illustrated migration processes in the ZrO 2 droplets with different contents of water and additives. Under the optimized conditions, the sintered ZrO 2 spheres with tetragonal phase exhibit high sphericity with highest nano-hardness of 9.5 GPa, indicating it is possible to be used in the engineering fields. Such spray granulation method could directly serve for the industrial production of zirconia and other ceramic materials since it is a stable process with high yield, good granulating quality and strong controllability.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Le Zhang,Yaozong Li,Xiaoyang Li,Hao Yang,Xuebin Qiao,Tianyuan Zhou,Zhongying Wang,Jian Zhang,Dingyuan Tang
Solid content of suspension for spray drying was systematically investigated to obtain spherical and dense Nd: granulated particles. The rheological behavior, morphology, size and distribution, apparent and tap densities, and transmittance measurements were used as tools to guide the selection of solid content of suspension. The balanced solid content were 42.0 wt.%. The granulated particles exhibited close to mono-dispersed, spherical and uniform dense aggregates, and mean size was ∼35 μm. Under 60 MPa pressure, the granules were completely crushed without obvious inter-granules void. The homogeneous element distribution and fine microstructure provided high optical quality of Nd:YAG ceramics and the transmittance at 1064 nm reached up to 84.90%.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Hanqing Zhao,Lingyu Meng,Feiyu Wang,Irfan,Ming Hu
Powder preparation is the key step in producing laser cladding coatings with desired properties. In this paper, quaternary TiO 2 -B 4 C-C-Cu composite powder with high sphericity and good densification has been successfully prepared by a powder fabrication process combining spray granulation with densification sintering. The effects of slurry characteristics, spray granulation process parameters, and densification sintering temperature on particle morphology and performance were studied. The formation mechanism of quaternary spherical TiO 2 -B 4 C-C-Cu composite powder was revealed by analyzing the process of heat transfer and water transfer in the droplets, and the optimization direction of the powder preparation was indicated. The optimized process parameters for the quaternary spherical TiO 2 -B 4 C-C-Cu composite powder are: slurry solid content of 52 wt%, dispersant content of 1.25 wt%, binder content of 2 wt%, inlet temperature of 180 °C, the airflow rate of 310 L/h, slurry feed rate of 4.5 ml/min, and the two-stage temperatures of densification sintering are 500 ℃ and 900 ℃ for 1 h, in turn. Under the optimized process, the fluidity of the powder reaches 112 s/50 g, the apparent density reaches 1.2 g/ml, and more than 70% of the particles are between 15–53 µm. The powder has been verified by laser cladding to prepare in-situ synthesized TiB 2 -TiC-Cu composite coatings , which could have a better prospect for potential application.
研究领域:
材料科学
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表面工程
✓ 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
·
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
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shengyuan Chen,Kailei Lu,Xiaolan Zhou,Zehua Zhouchen,Xu Huang,Jianqi Qi,Tiecheng Lu
In this work, a simple, safe, and low-cost two-step route for preparing spherical AlN powders was developed. Specifically, pure AlN spherical powder can be obtained by using water as the solvent, ammonium polyacrylate as the dispersant, carbon powder and alumina powder as the raw materials, spraying and granulating into a spherical precursor, and then sintering at high temperature under a nitrogen atmosphere. The results demonstrate that the average size and the associated distribution of the precursor can be adjusted by regulating the solid or dispersant content of the slurry, which is beneficial for governing the size of the AlN powder. The average particle size of the sintered spherical AlN powders is approximately 33.5 μm, presenting high sphericity (greater than 0.9) and excellent flowability. This approach developed for preparing spherical AlN powder is of great significance for promoting the widespread application of AlN powder in the field of high-performance fillers.
研究领域:
材料科学
·
无机化学
✓ 已验证
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
MATERIALS SCIENCE AND TECHNOLOGY
·
2024
·
IF 1.7
Chao Yan,Xiufang Cui,Yongzhi Jing,Zhuo Chen,Rui Wang,Guo Jin,Jinna Liu
The (La0.5Eu0.25Y0.25)2Zr2O7 (LEYZ) ceramic powder for spraying was prepared and synthesised by combining spray granulation and solid phase reaction phase, and a double ceramic layer structure with (La0.5Eu0.25Y0.25)2Zr2O7 ceramic surface coating and YSZ intermediate coating was prepared by atmospheric plasma spraying. Experimental characterisation revealed that the moulding state of spray granulated powders was significantly influenced by the solid content. When the solid content is small, the viscosity of the slurry is insufficient, and the prepared powder has poor formability and small overall particle size. When the solid content is large, the slurry is too viscous, which easily leads to unfavourable conditions such as sticky walls. The best formability of the pelletised powder was obtained with a solid content of 55 wt-% and a binder content of 2.0 wt-%. Compared with La2Zr2O7 (LZ) ceramics, the fracture toughness of the rare-earth co-doped modified LEYZ ceramic coating was increased by 8.4% and the bond strength was increased by 49.9%, showing good toughness and crack resistance. Moreover, LEYZ coating has significantly better resistance to solid phase particle erosion than LZ coating, with 46.3% and 45.4% reduction in erosion rate at 45° and 90°, respectively.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yadong Wang,Yabo Shang,Keqian Li,Juan Shi,Shiyi Hu,Pengkang Jin,Xin Jin,Xiaochang C. Wang
Naturally co-occurring phosphate (P) and dissolved organic matter (DOM) in raised livestock wastewater have caused increasing public concerns. This study fabricated a novel nucleation crystallization pelleting process (NCP) showing orientated P recovery and HA (as a major fraction of DOM) removal from wastewater. Results showed that after 120 h of continuous operation, the total removal efficiency of P and HA stabilized at 97.5 % and 92 %, respectively, by using a three-stage NCP process. The NCP results further demonstrated that the main recovery mechanism of P involves surface-induced precipitation of P in the form of hydroxyapatite (HAP) on the seed surface by modulating the supersaturation of HAP in the system. The FTIR, SEM-EDS, and XPS analysis combined with DFT calculations revealed the molecular-level mechanisms for removing HA, which were mainly controlled by Calcium ions bridging, H-bonding, and π-π stacking. More importantly, the attached HAP on the seed surface would enhance the mutual interaction with HA, further enhancing the removal efficiency of HA. This contribution not only opens a high potential avenue for further research on the simultaneous capture of P and organic matter but also sheds light on the development of the practical application of the NCP remediation strategies.
研究领域:
环境科学
·
废水处理
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 107
·105755-105760
·
IF 3.289
Xiaokai Li,Yangyang Xu,Xiaojian Mao,Qiangqiang Zhu,Minghui Feng,Benxue Jiang,Long Zhang
A modified vibrating screen method was employed to prepare granulated Y2O3 powders, which were used to fabricate transparent ceramics. The granulation process was carried out with yttrium-stabilized zirconia balls (5 mm in diameter) in a 200-mesh screen, which was vibrated by a Heidolph shaker. After passage through the vibrating screen, the sub-micron Y2O3 particles were converted into large granules and collected in the bottom chamber of the sieve. Compared with the original powders, the granulated powders had a smaller repose angle of 34.09° and larger apparent and tap densities with sharp rises of 50.54 and 32.07%, respectively, indicating a good flowability and filling properties. A high transmittance of 82% at 2500 nm was achieved for ceramics prepared using the granulated powders by vacuum sintering and hot isostatic pressing (HIP).
研究领域:
材料科学
·
无机非金属材料
·
陶瓷学
·
粉末冶金
·
光学材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ming Shang,Bin Wang,Jian Liu,Lin Zhu,Baoliang Xu,Tao Duan,Jing Chen
Granulation technology enables effective industrial use of powder adsorbents by addressing pressure drop and operability challenges in engineering systems. In this study, a bismuth-embedded mesoporous silicon‑iodine adsorbent (Bi/Bi 2 S 3 @SiO 2 ) was synthesized using oil-ammonia column granulation technology, enabling. This method enabled the efficient and controllable granulation of the powder adsorbent and large-scale production. Considering the high temperature, high humidity, NO x , and dynamic gas flow characteristics of spent fuel reprocessing exhaust gases, we systematically evaluated the dynamic iodine adsorption performance of the granular adsorbent under simulated real conditions. Experimental results indicate that the static adsorption capacity for iodine vapor of Bi/Bi 2 S 3 @SiO 2 –2 is approximately 600 mg/g. The optimized granular adsorbent exhibits excellent mechanical strength and a uniform particle size distribution. Although its static adsorption capacity decreases by approximately 10 %, the dynamic adsorption capacity reaches 112 mg/g after breakthrough. The iodine removal efficiency exceeds 99.00 % during a continuous 30 h test. Further mechanistic analysis reveals that the adsorption of iodine vapor by Bi/Bi 2 S 3 @SiO 2 –2 primarily occurs through stable chemical adsorption (BiI 3 ). This study provides essential data to support the advancement of controlled granulation technology and the engineering application of radioactive iodine adsorbents, presenting a new strategy for the design of adsorbents in nuclear waste treatment systems.
研究领域:
核工程
·
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yueyue Gao,Yiqian Yao,Chuanwen Zhao,Pu Huang,Yafei Guo,Jian Sun
The capture of CO 2 from flue gas after combustion using solid sorbents is one of the efficient options for reducing CO 2 emissions from fossil fuel-fired power plants. To satisfy the requirement of large quantities flue gas treatment, the CO 2 capture capacities of the solid sorbents must be focused on. In this study, K 2 CO 3 /Al 2 O 3 adsorbents were prepared via spray granulation, achieving an optimal CO 2 adsorption capacity of 1.89 mmol/g at a potassium carbonate loading of 30 wt%. To address the limitations of potassium-based adsorbents, we further enhanced the performance by incorporating polyethyleneimine (PEI), an amine-functionalized material known for its high CO 2 affinity, in the K30Al adsorbent. A series of potassium-amine composite adsorbents were synthesized with varying PEI loadings (1 wt%, 3 wt%, 5 wt%, and 7 wt%). Remarkably, a synergistic effect between K 2 CO 3 and PEI was observed, with the 5 wt% PEI loading yielding the highest CO 2 adsorption capacity of 2.19 mmol/g, representing a 16 % improvement over the unmodified adsorbent. This represents a novel K30Al-P5 composite adsorbent successfully fabricated through deposition of a small amount of PEI onto pre-synthesized K30Al substrate via the spray granulation method. Comprehensive characterization, including adsorption capacity, cyclic stability, and structural properties, revealed that the enhanced performance is attributed to the optimized interaction between K 2 CO 3 and PEI, which facilitates CO 2 chemisorption and diffusion. This study not only demonstrates a significant improvement in CO 2 capture efficiency but also provides a scalable and cost-effective strategy for designing high-performance adsorbents.
研究领域:
环境科学
·
化学工程
·
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2025
·Vol. 19
·期 12
·1-12
·
IF 4.5
Song Jinbo,Jing Jieying,Zhang Jinpeng,Xu Yufeng,Li Wen-Ying
Alkaline metal salt-promoted MgO sorbents are effective for CO 2 capture, but they face challenges with decreased CO 2 capture performance and powder elutriation in practical applications, arising due to the loss of pore structures and poor mechanical strength of alkaline metal salt-promoted MgO sorbent powder. Herein, granulation technology was employed to resolve the above problem. The optimized alkaline metal salt-promoted MgO sorbent pellets exhibited a CO 2 capture capacity of 11.46 mmol·g −1 and a mechanical strength of 11.14 MPa. This mechanical strength was nearly three times greater than that of alkaline metal salt-promoted MgO sorbent pellets without granulation promoters. After 20 cycles, CO 2 capture capacity stabilized at 8.71 mmol·g −1 , while mechanical strength was maintained at 8.92 MPa. Through characterization, it was revealed that the pore structure generated by the pyrolysis of the granulation promoters notably increased the specific surface area, leading to high CO 2 capture capacity. Meanwhile, the strengthened mechanical strength of the alkaline metal salt-promoted MgO sorbent pellets was primarily due to the in situ formation of a γ -AlOOH sol-gel cluster skeleton. Thus, this study provides an effective technological pathway to enhance the performance of the alkaline metal salt-promoted MgO sorbent pellets for industrial applications.
研究领域:
化学工程
·
环境科学
·
材料科学
·
工业应用
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）