Advanced Powder Technology最新文献_第8页

Increasing the yields of natural flake graphite spheronization with the NARA Hybridization System 用NARA杂交系统提高天然鳞片石墨球化收率

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-12-01 Epub Date: 2025-11-24 DOI: 10.1016/j.apt.2025.105115

Dean Glass , Thushan Pathirana , Shiqin Yan , Adam S. Best , Mehrdad Parsa , Karl Bunney , Amanda V. Ellis

{"title":"Increasing the yields of natural flake graphite spheronization with the NARA Hybridization System","authors":"Dean Glass , Thushan Pathirana , Shiqin Yan , Adam S. Best , Mehrdad Parsa , Karl Bunney , Amanda V. Ellis","doi":"10.1016/j.apt.2025.105115","DOIUrl":"10.1016/j.apt.2025.105115","url":null,"abstract":"<div><div>Commercial natural flake graphite spheronization using mill trains, particularly for lithium-ion battery (LIB) materials, is known to produce low yields (30–50 %) post-processing. The NARA Hybridization System (NHS-0) is a rotary mill with the capability to spheronize natural flake graphite within the specifications required for LIB graphite materials. In this work, commercial natural flake graphite, with a D<sub>50</sub> particle size of ∼ 83 µm, was spheronized in a NHS-0 at various speeds and durations. Conditions were optimized to produce spheronized particles in the size range of 4 µm to 30 µm, ideal for LIB anodes for electric vehicle applications. The optimal conditions for 10 g batches were found to be 9000 RPM for 180 s, which produced the highest yield (52 %), in specification, with the least amount of fines (<4 µm). This product was sieved with coarser material (>25 µm) and re-fed into the NHS-0 in order to maximise the yields. The cumulative total yields from the re-spheronization were 65 %, 68 % and 71 % for the 1st, 2nd and 3rd re-spheronizations, respectively. Notably, the re-spheronization did not degrade the product as observed <em>via</em> X-ray diffraction, scanning electron microscopy and Raman spectroscopy. Coin cell testing showed a minor decrease in initial coulombic efficiency of 93.1 % to 90.1 % and capacity from the initial spheronization to the 3rd re-spheronized materials, respectively.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 12","pages":"Article 105115"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145615090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Study on the effect of porous materials with sand-dust adhesion on explosion characteristics of combustible gas in utility tunnels 含沙尘的多孔材料对公用事业隧道可燃气体爆炸特性的影响研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-12-01 Epub Date: 2025-11-11 DOI: 10.1016/j.apt.2025.105114

Zehao Yin, Lingjun Xu, Zengliang Zhang

{"title":"Study on the effect of porous materials with sand-dust adhesion on explosion characteristics of combustible gas in utility tunnels","authors":"Zehao Yin, Lingjun Xu, Zengliang Zhang","doi":"10.1016/j.apt.2025.105114","DOIUrl":"10.1016/j.apt.2025.105114","url":null,"abstract":"<div><div>This study systematically investigates the coupling effects of pore characteristics and sand-dust adhesion on methane-air explosion propagation. Experiments were conducted in a semi-confined pipeline using four types of silicon carbide foam ceramics (10–40 PPI) with controlled sand-dust loads (0–20 mL) at two strategic positions. High-speed imaging and pressure sensors recorded flame velocity and overpressure dynamics. Results demonstrate a critical pore-dependent suppression mechanism: while 10 PPI materials enhance flame acceleration due to insufficient quenching, 20 PPI permits limited propagation, and 30–40 PPI show progressively stronger suppression, with 40 PPI achieving optimal performance as its pore size approaches methane’s quenching diameter. Sand-dust adhesion creates competing effects—inducing turbulence while causing flow blockage—leading to a nonlinear response where explosion intensity peaks at 10 mL across all materials. This consistent pattern reveals a universal coupling mechanism between particulate resuspension and porous structures. The findings provide both fundamental insights into explosion dynamics and practical guidelines for designing advanced industrial explosion protection systems, particularly in dust-prone environments like utility tunnels and industrial ducts.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 12","pages":"Article 105114"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145517789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Inside Front Cover (Aims & Scope, Editors) 内页封面（Aims & Scope，编辑）

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-12-01 Epub Date: 2025-12-08 DOI: 10.1016/S0921-8831(25)00358-9

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Study on flotation performance and selective adsorption mechanism of new α-fatty acid on associated barite 新型α-脂肪酸在伴生重晶石上的浮选性能及选择性吸附机理研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-12-01 Epub Date: 2025-10-31 DOI: 10.1016/j.apt.2025.105097

Yuanyuan Tao , Junwei Huang , Jie Liu , Wencheng Ge , Tianjiao Chang , Kai Jiang , Liang Lv

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Preparation and mechanism of novel cementitious materials made from biomass power plant ash based on alkaline-thermal composite activation 基于碱-热复合活化的生物质电厂灰新型胶凝材料的制备及机理研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-12-01 Epub Date: 2025-10-30 DOI: 10.1016/j.apt.2025.105091

Tian Qiu , Tingye Qi , Guorui Feng , Hongtao Xu , Haochen Wang , Linfei Wang , Siyuan Cheng , Lubin Li , Kexin Xu

{"title":"Preparation and mechanism of novel cementitious materials made from biomass power plant ash based on alkaline-thermal composite activation","authors":"Tian Qiu , Tingye Qi , Guorui Feng , Hongtao Xu , Haochen Wang , Linfei Wang , Siyuan Cheng , Lubin Li , Kexin Xu","doi":"10.1016/j.apt.2025.105091","DOIUrl":"10.1016/j.apt.2025.105091","url":null,"abstract":"<div><div>Improper management of biomass power plant ash (BPPA), a byproduct of power generation, can lead to significant environmental issues. This study investigates the development of a novel cementitious material (NCM) via the alkali-thermal activation of BPPA, leveraging its pozzolanic properties. The effects of alkali activator concentration (0 %–4%), CaO content (25 %–65 %), and calcination temperature (850–1250 °C) on phase composition, microstructure, conductivity, and cementing performance were systematically evaluated. Using the Krstulovic–Dabic hydration model, the hydration mechanism and kinetics of NCM were analyzed. Results show that the alkali activator (Na<sub>2</sub>SiO<sub>3</sub> + NaOH) promotes the formation of silicon-oxygen tetrahedra, increases pH, and facilitates C-S-H gel production via hydrothermal reactions. Higher CaO content reduces low-activity N-A-S-H phases and favors the formation of high-activity C-S-H phases. The main active phases after alkali-thermal activation are C<sub>12</sub>A<sub>7</sub> and C<sub>2</sub>S. Optimal NCM preparation conditions—2 % alkali activator, 45 % CaO, and a calcination temperature of 950 °C—achieve compressive strengths of 12.18 MPa at 7 d and 24.66 MPa at 28 d. The production of NCM not only reduces cement demand but also enables the reuse of waste resources, supporting green and sustainable development.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 12","pages":"Article 105091"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145415012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Atomic-scale mechanisms of femtosecond laser double-pulse sintering in Cu nanoparticles: A multiscale simulation study 飞秒激光双脉冲烧结铜纳米粒子的原子尺度机制：多尺度模拟研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-12-01 Epub Date: 2025-11-20 DOI: 10.1016/j.apt.2025.105113

Yuzun Huang , Weiyong Tang , Ze Yu , Xiaochuan Xu , Feng He

{"title":"Atomic-scale mechanisms of femtosecond laser double-pulse sintering in Cu nanoparticles: A multiscale simulation study","authors":"Yuzun Huang , Weiyong Tang , Ze Yu , Xiaochuan Xu , Feng He","doi":"10.1016/j.apt.2025.105113","DOIUrl":"10.1016/j.apt.2025.105113","url":null,"abstract":"<div><div>Femtosecond laser sintering offers a promising route for fabricating Cu-based micro- and nano-devices, yet optimizing processing conditions to balance sintering efficiency with minimal thermal damage remains challenging. In this study, a comprehensive multi-scale investigation of dual-pulse femtosecond laser sintering of Cu nanoparticles is presented using a combined molecular dynamics and two-temperature model (MD-TTM) simulation framework. Initially, the nanoscale melting point was determined under both slow and rapid heating conditions, revealing a reduction compared to bulk copper due to size effects. Subsequent simulations explored the effects of inter-pulse delay and energy distribution on electron–lattice energy coupling and sintering kinetics. Our results indicate that, within a critical delay threshold (approximately 30 ps), dual-pulse processing can synergistically regulate electron temperature, suppress thermionic emission, and accelerate neck formation. Furthermore, by comparing different energy injection schemes, we found that while a high-low energy combination improves processing speed, an equal energy ratio yields the best overall balance between electron temperature control and morphological evolution. These findings provide theoretical guidance for tailoring dual-pulse laser parameters, offering enhanced process controllability and improved material quality for advanced laser sintering applications.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 12","pages":"Article 105113"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145569084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface modification of bulk material for particle bed 3D concrete printing – Effect on wettability, porosity, and mechanical properties 颗粒床3D混凝土打印用大块材料的表面改性。对润湿性、孔隙率和机械性能的影响

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-12-01 Epub Date: 2025-11-24 DOI: 10.1016/j.apt.2025.105123

Niklas Meier , Friedrich Herding , Harald Zetzener , Inka Mai , Dirk Lowke , Arno Kwade

{"title":"Surface modification of bulk material for particle bed 3D concrete printing – Effect on wettability, porosity, and mechanical properties","authors":"Niklas Meier , Friedrich Herding , Harald Zetzener , Inka Mai , Dirk Lowke , Arno Kwade","doi":"10.1016/j.apt.2025.105123","DOIUrl":"10.1016/j.apt.2025.105123","url":null,"abstract":"<div><div>This study investigates the influence of particle surface modifications on particle bed concrete 3D printing by Selective Cement Activation (SCA). Prior research suggests that enhancing particle wettability and reducing bulk porosity of the particle bed increases the performance of SCA components. In this work, the effects of dry coatings (nanoscale SiO<sub>2</sub> and TiO<sub>2</sub>) and a liquid grinding aid (diethylene glycol – DEG) on the wettability and bulk density of two sand fractions and a sand/cement mixture were examined. Nanoscale SiO<sub>2</sub> was found to improve the wettability of the sand/cement mixture, while DEG and nanoscale TiO<sub>2</sub> increased the bulk density and, consequently, reduced the bulk porosity. Based on the results, specimens were 3D printed using the modified materials. Surface modification by DEG increased the compressive strength of printed specimens by 30% compared to the unmodified, reference material. This increase is attributed to a higher bulk density and, thus, particle bed density compared to the reference material. We conclude that surface modifications enhancing the bulk density can significantly increase the compressive strength of SCA components, thereby expanding SCA’s potential and facilitating its use in construction.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 12","pages":"Article 105123"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145615088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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CFD-DEM modeling and simulation of ellipsoidal particles in a gas–solid spouted bed 气固喷流床中椭球颗粒的CFD-DEM建模与仿真

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-12-01 Epub Date: 2025-11-04 DOI: 10.1016/j.apt.2025.105095

Ling Zhou , Haihan Yu , Zhenjiang Zhao , Daramy Kallon , Ramesh Agarwal , Jie Chen

{"title":"CFD-DEM modeling and simulation of ellipsoidal particles in a gas–solid spouted bed","authors":"Ling Zhou , Haihan Yu , Zhenjiang Zhao , Daramy Kallon , Ramesh Agarwal , Jie Chen","doi":"10.1016/j.apt.2025.105095","DOIUrl":"10.1016/j.apt.2025.105095","url":null,"abstract":"<div><div>Gas-solid spouted beds are widely used in fields such as biomass combustion due to their excellent heat transfer performance and gas–solid mixing efficiency. The size, shape, and density of biomass particles play a crucial role in the two-phase flow and combustion kinetics processes. However, existing research has primarily focused on spherical biomass particles, and the fluidization mechanisms of non-spherical particle systems has not yet been fully understood. Therefore, studying the fluidization characteristics of non-spherical particle systems is of great significance for advancing fluidization theory and optimizing the design of spouted bed reactors. This study employs the computational fluid dynamics (CFD) and discrete element method (DEM) framework to investigate the fluidization characteristics of ellipsoidal particles and validates the reliability of the numerical model through high-speed photography experiments. The results indicate that as the inlet gas velocity increases, the average bed height and void fraction of ellipsoidal particles in the spouted bed gradually increase, and the particle mixing quality is enhanced. As the initial accumulation height increases, the average bed height and volume fraction of ellipsoidal particles gradually increase, while the overall particle mixing quality decreases. Particles with orientation angles between 30° and 45°constitute a smaller proportion, whereas those with orientation angles between 75° and 90° constitute a larger proportion.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 12","pages":"Article 105095"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145463957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Implementation of a Yukawa force model in polymer-induced bridging flocculation of hematite particles using CFD-DEM 利用CFD-DEM实现汤川力模型在赤铁矿颗粒聚合物诱导桥接絮凝中的应用

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-12-01 Epub Date: 2025-11-13 DOI: 10.1016/j.apt.2025.105096

Lequan Zeng , Jackquline C. Eardley , George V. Franks , Eirini Goudeli

{"title":"Implementation of a Yukawa force model in polymer-induced bridging flocculation of hematite particles using CFD-DEM","authors":"Lequan Zeng , Jackquline C. Eardley , George V. Franks , Eirini Goudeli","doi":"10.1016/j.apt.2025.105096","DOIUrl":"10.1016/j.apt.2025.105096","url":null,"abstract":"<div><div>Polymer-induced bridging flocculation of hematite particles under laminar shear flow is simulated using a coupled Computational Fluid Dynamics – Discrete Element Method (CFD-DEM). The attractive interactions between the polymer-coated particles are represented by a Yukawa force model, parameterised through benchmarking the CFD-DEM-derived cumulative chord length distributions (CLDs) against experimental measurements. By introducing a power-law dependency of the interaction constant on polymer dosage, the model accurately predicts the experimentally observed steady state mean aggregate chord length across a polymer dose range of 50–250 g/t. At steady state, the mass mean aggregate size, <span><math><mrow><mover><mrow><msub><mi>D</mi><mrow><mn>4</mn><mo>,</mo><mn>3</mn></mrow></msub></mrow><mrow><mo>¯</mo></mrow></mover></mrow></math></span>, scales linearly with the average chord length, <span><math><mrow><mover><mrow><mi>CL</mi></mrow><mrow><mo>¯</mo></mrow></mover></mrow></math></span>, establishing a quantitative relationship between particle size and chord length. The flocculation kinetics are described using a modified shear-induced aggregation rate that incorporates an enhancement factor, <span><math><mrow><mi>γ</mi></mrow></math></span>, based on the effective volume fraction that includes both the particles and their polymer layers. The proposed flocculation rate captures the influence of the interaction range introduced by polymer extension and enables accurate prediction of polymer-induced flocculation in mineral suspensions.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 12","pages":"Article 105096"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145517781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pyrocarbon coatings of nanometer and submicron thickness on coarse diamond and silicon carbide powders differing in particle shape 在颗粒形状不同的粗金刚石和碳化硅粉末上制备纳米和亚微米厚度的焦碳涂层

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-12-01 Epub Date: 2025-11-10 DOI: 10.1016/j.apt.2025.105099

Andrey M. Abyzov , Fedor M. Shakhov , Maria V. Tomkovich , Maxim M. Sychev

{"title":"Pyrocarbon coatings of nanometer and submicron thickness on coarse diamond and silicon carbide powders differing in particle shape","authors":"Andrey M. Abyzov , Fedor M. Shakhov , Maria V. Tomkovich , Maxim M. Sychev","doi":"10.1016/j.apt.2025.105099","DOIUrl":"10.1016/j.apt.2025.105099","url":null,"abstract":"<div><div>Pyrocarbon coatings were applied to coarse-grained (particle size of about 250 μm) diamond and silicon carbide powders by chemical vapor deposition (CVD). The substrate particles were smooth-faced and isometric for diamond, whereas for silicon carbide they were elongated and had irregular shape. According to scanning electron microscopy (SEM) and Raman spectroscopy, the coatings obtained are typical of pyrocarbon. The BET specific adsorption surface area <em>s</em><sup>a</sup><sub>m</sub> and the electrical resistance <em>R</em> of the powders in the packed bed were measured, as well as the coating density <em>ρ</em><sub>c</sub>. All the obtained data on the coating properties and structure are presented as dependences on the mass-average coating thickness <em>h</em> calculated from the coating mass and the specific geometric surface area <em>s</em><sup>g</sup><sub>m</sub> of the substrate powder. The <em>s</em><sup>g</sup><sub>m</sub> value was determined using the average particle size and the shape coefficient (sphericity). This made it possible to identify the differences between nanometer and submicron coatings (<em>h</em> ≤ 0.1 μm or <em>h</em> > 0.1 μm) and to relate the observed features of the <em>ρ</em><sub>c</sub>(<em>h</em>), <em>s</em><sup>a</sup><sub>m</sub> (<em>h</em>), and <em>R</em><sup>−1</sup>(<em>h</em>) dependences to the coating microstructure (roughness, continuity, etc.). The diagrams <em>h</em>(<em>τ</em>), where <em>τ</em> is the deposition time, enabled us to compare the pyrocarbon growth rate on diamond and on silicon carbide.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 12","pages":"Article 105099"},"PeriodicalIF":4.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145517782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0