POWDER TECHNOLOGY
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2021
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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
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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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
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无机化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Chao Wang,Fangbao Jiao,Shuhai Zhang,Ruijun Gou,Hongzhen Li,Yu Liu,Xin Zhou
The introduction of organic solvent nanofiltration (OSN) technology into the crystallization process of energetic materials (EMs) can enhance solvent utilization and enable precise control of supersaturation during crystallization. However, incorporating OSN technology increases the number of tunable variables in the crystallization process, complicating the optimization of process parameters. Consequently, there is a pressing need to develop an efficient method for optimizing crystallization parameters based on experimental data. Herein, 1,3,5-trinitro-1,3,5-triazinane (RDX) crystals were selected as the research subject, and a method for optimizing experimental operating conditions for nanofiltration-assisted cooling crystallization (NF-CCr) was established using machine learning (ML) techniques. This method includes feature engineering, model prediction interpretation, and verification. In the feature engineering, 85 sets of high-quality experimental datasets were collected, and dimensionality reduction was performed using Principal Component Analysis (PCA) and correlation analysis to enhance the model’s trainability while preserving data variability. Four ML models were trained and optimized: Random Forest (RF), K-Nearest Neighbors (KNN), Support Vector Machine (SVM), and Back Propagation Neural Network (BPNN). The prediction yield R2 of the BPNN regression model reached 0.89, while the RF binary classification model achieved an accuracy of 91.66% for particle size and 84.72% for sphericity. The SHapley Additive exPlanation (SHAP) method was employed to elucidate the intrinsic correlations between experimental operating conditions and product characteristics. Finally, under the experimental conditions predicted by the RF classification model, RDX crystals with high sphericity (>85%), large particle size (>100 μm), and high purity (>99%) were successfully obtained, achieving an experimental verification accuracy of 80%. This study provides a data-driven optimization solution for the development of complex crystallization processes for EMs.
研究领域:
化学工程
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材料科学
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人工智能
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Bo Shi,Qinghua Lei,Dan Wang,Yuan Pu,Jie-Xin Wang,Xiao-Fei Zeng,Jian-Feng Chen
Ultrasamll nanoparticles that simultaneously exhibit narrow size distribution and high circularity are key to enabling multifunctional applications in optoelectronic systems, integrated circuits and robots. Calcium carbonate (CaCO 3 ) nanoparticles with various shapes and sizes have found applications in both science and technology, while controlled synthetic approaches toward nanoparticles with high circularity remain challenging. Herein, we report the synthesis of spherical CaCO 3 nanoparticles using air nanobubbles as additives in reactive precipitation. Air nanobubbles (≈100 nm, stable > 5 days) were generated via a rotating packed bed. During precipitation, these nanobubbles acted as immobile impurities, directing crystal growth. This yielded spherical CaCO 3 nanoparticles (6.89 ± 0.75 nm in average) with calcite structure and exceptional circularity (0.97 in maximum). In situ liquid-phase TEM revealed the nanobubbles’ role in inducing anomalous growth, providing deep insight into spherical nanoparticle synthesis for diverse applications.
研究领域:
材料科学
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纳米技术
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晶体工程
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胶体与界面化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
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2024
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IF 3.7
Hao Liu,Qiang Chen,Sufeng Chen,Jie Li,Qianqian Gu,Meifang Liu
Doped polymer spheres are essential for preparing targets for the inertial confined fusion (ICF) experiments since they can provide important information about the implosion. To prepare Fe-doped polystyrene (PS) spheres, ferrocene-doped PS spheres were successfully prepared by a straightforward method combining physical doping and microfluidic technology. The effect of ferrocene on the quality of the PS spheres was investigated and the relevant mechanism was discussed. Due to the compatibility of PS, ferrocene and fluorobenzene, the Fe-doped polystyrene spheres exhibited good monodispersity, sphericity and surface finish when the ferrocene content in the oil phase solution was lower than 3 %. These properties can meet stringent design requirements for ICF. This study provides valuable insights for the preparation of doped polymer spheres for ICF experiments.
研究领域:
材料科学
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核工程
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微流控技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Menghui Yao,Bingzhi Yi,Lingyu Wang,Jiahao Wei,Yanyu Ma,Ling Zhou,Mingyang Chen,Junbo Gong
Phosphorus (P) recovery from wastewater as struvite not only alleviates global P resource shortages but also prevents water eutrophication caused by wastewater discharge. This study presents a sodium dodecyl benzene sulfonate (SDBS)-assisted struvite crystallization method (SASC method) to recover P as the struvite crystalline microspheres with uniform particle size (27.51 ± 3.60 μm), high sphericity (roundness = 0.91 ± 0.04), and good dispersibility (no aggregation) under various operating conditions with different N/P/Mg molar ratios and magnesium sources. Mechanism of microsphere formation and the regulation of modifier type and process parameters (SDBS concentration, initial pH, and stirring rate) on microsphere formation are explored in detail to realize the controllable fabrication of microspheres. Compared with common struvite crystals, microspheres have more outstanding performance in multiple applications. Specifically, microspheres have improved powder properties including bulk density and fluidity, better slow-release fertilizer performance, that is, slower dissolution in water and soil, and the ability to prepare superior mesoporous phosphate materials with better macroscopic morphology and higher loading capacity. Thus, this study markedly improves the multiple application performance of struvite by designing and controlling the product morphology based on its simplicity and efficiency. These provide new insights into recovering P in the form of struvite with excellent quality, thereby enhancing the economic value of the recycled products of P recovery from wastewater
研究领域:
环境科学
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化学工程
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废物管理
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材料科学
✓ 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）