Advanced Powder Technology最新文献

{"title":"Novel in-situ core shell structured Fe-ferrite soft magnetic composite powder processed by controlled oxidation","authors":"Janapareddi Sravan Kumar ,&nbsp;Deepak Kumar ,&nbsp;Vajinder Singh ,&nbsp;Joydip Joardar ,&nbsp;Malobika Karanjai","doi":"10.1016/j.apt.2024.104779","DOIUrl":"10.1016/j.apt.2024.104779","url":null,"abstract":"<div><div>The present work focuses on a novel approach of forming core–shell soft composite powder of Fe-Fe₃O₄ having ferrite as an electrically insulating layer around Fe-powder. The approach involves simple low-temperature in-situ oxidation-diffusion to obviate the interface delamination of core–shell structure while enabling % phase-control of ferromagnetic-core and ferrimagnetic-shell with time–temperature variation. Fe-powder was heated upto 400 °C-600 °C and subjected to oxidation for 5–15 min before cooling under inert atmosphere (N₂). A thorough investigation of core–shell powders was done using Micro-XRD, FE-SEM, EBSD and Saturation magnetization (Ms) was measured using PPMS. The shell thickness increased with increasing temperature and oxidation time. Co-relation between phase percentages in the core–shell powder &amp; Ms values were established. The process resulted in higher Ms values (209–136 emu/g) compared to those reported in the literature in such powders with average shell thickness ranging from 0.4 µm to 14.3 µm, retaining the characteristic soft magnetic property of Fe-Fe₃O₄ composite powder.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 2","pages":"Article 104779"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131163","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}

{"title":"Construction and electrochemical energy storage performance of FeS2@rGO-H/S","authors":"Wen Fengchun,&nbsp;Song Xi,&nbsp;Wu Jun,&nbsp;Xie Ruijie,&nbsp;Pan Mengye,&nbsp;Fu Junxian,&nbsp;Jiang Qi","doi":"10.1016/j.apt.2025.104785","DOIUrl":"10.1016/j.apt.2025.104785","url":null,"abstract":"<div><div>Lithium-Sulphur (Li-S) batteries were one of the most promising batteries for large-capacity energy storage and electric vehicles. However, the shuttle effect of polysulfide lithium, the volume expansion and the poor electrical conductivity of sulfur in the process of charge and discharge restricted its application. In this paper, the authors constructed a composite of FeS₂@rGO-H as the carrier of sulfur. XRD, Raman, XPS SEM and BET analyses were used to characterize the obtained samples. The results showed that the prepared reduced graphene (rGO-H) obtained by the hydrazine hydrate and hydrothermal reduction method had a very high degree of reduction, which helped to accelerate the rapid transport of lithium ions in the positive sulfur electrode. And the FeS₂ fixed on rGO-H could inhibit the “shuttle effect” of polysulfide lithium and improved the cycling performance of sulfur positive electrode. Thus, the obtained composite FeS₂@rGO-H/S exhibited excellent electrochemical properties: its initial discharge capacity was up to 1529.2mAh/g at 0.1C, which was 91 % of the theoretical specific capacity of S. Even at a high rate of 5C, it still had a reversible discharge capacity of 629.9mAh/g. After 200 cycles at 1C, the discharge capacity attenuated from 1037.3 to 784.7mAh/g.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 2","pages":"Article 104785"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131164","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}

{"title":"Inside Front Cover (Aims & Scope, Editors)","authors":"","doi":"10.1016/S0921-8831(25)00016-0","DOIUrl":"10.1016/S0921-8831(25)00016-0","url":null,"abstract":"","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 2","pages":"Article 104795"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131460","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}

{"title":"Data interpolation and characteristic identification for particle segregation behavior and CNN-based dynamics correlation modeling","authors":"Wei Wang ,&nbsp;Yanze Wang ,&nbsp;Shengchao Yang ,&nbsp;Jinpeng Qiao ,&nbsp;Jinshuo Yang ,&nbsp;Miao Pan ,&nbsp;Zhenyong Miao ,&nbsp;Yu Zhang ,&nbsp;Sabereh Nazari ,&nbsp;Chenlong Duan","doi":"10.1016/j.apt.2024.104761","DOIUrl":"10.1016/j.apt.2024.104761","url":null,"abstract":"<div><div>Particle segregation behavior in a binary granular bed subject to vibration has been investigated. An algorithm based on Locally Weighted Scatterplot Smoothing (LoWeSS) was developed for trajectory reconstruction and motion characteristics extraction of segregated particles. The Kriging interpolation was introduced to address the problem of the sparse spatial distribution of segregation velocity data, and the K-means clustering algorithm was used and indicated that the discrete distribution of segregation velocity data at layers of different heights in the granular bed has regionalized shape characteristics, including circular, elliptic, fusiform, and mono-symmetric shapes. Segregation velocity correlates well to dimensionless amplitude (<em>A_d</em>) and frequency (<em>f_d</em>). When <em>A_d</em> ∈ [0.6, 0.7] and <em>f_d</em> ∈ [0.75, 1], the ascending velocity of segregated particles within the lower layer of the granular bed is relatively fast, and some of the large particles initially located at the higher layer will first fall as the packing structure reorganization and then start to segregate. In addition, a data preprocessing algorithm based on Local Spatiotemporal Correlation Interpolating (LoStCoI) is developed to repair granular temperature data. The depth-wise spatiotemporal residual convolutional neural networks (CNNs) with the Spatial Pyramid Pooling (SPP) module can well characterize the correlation between granular temperature and segregation velocity. The validation errors for both the regression and classification tasks are less than 0.1, and the comprehensive evaluation index also achieves 0.9. Specifically, when provided with a sufficient amount of training data, the evaluation metrics for the regression task on the validation dataset exceed 99 %, and those for the classification task even reach as high as 99.5 %.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 2","pages":"Article 104761"},"PeriodicalIF":4.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131463","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}

{"title":"Hurst analysis via multi-scale resolution to diagnose flow regimes in gas–solid micro-fluidized beds","authors":"Yanjun Li ,&nbsp;Xue Li ,&nbsp;Yupeng Du ,&nbsp;Likun Ma","doi":"10.1016/j.apt.2025.104805","DOIUrl":"10.1016/j.apt.2025.104805","url":null,"abstract":"<div><div>Micro-fluidized beds (MFBs) with an ultra-fast energy transmission rate and high wall flux have recently attracted considerable interest. The hydrodynamic behavior in the MFBs has been demonstrated to deviate from the ones in the laboratory-scale fluidized beds (LFBs) because of the prominent wall effect. In order to understand the influence of the wall effect on flow regime transformation, a comprehensive experimental analysis, considering the effects of bed diameter, static bed height, and the properties of particles, was conducted using pressure drop data and visualization images. A new Hurst analysis, combined with a multi-scale resolution methodology, has been established to diagnose flow regimes, which successfully reflected the bubble characteristics of the fluidization system on the <em>meso</em>-scale. A generalized flow regime diagram was proposed based on the analysis of experimental data, and the influence of key factors on the velocity of flow pattern transformation was further investigated. On this basis, in the absence of preset function forms, the data-driven symbolic regression method was used to simultaneously search for the equation form and various parameters of the prediction correlation, and an empirical correlation formula for predicting the transformation of each flow pattern was automatically generated with excellent predictability. It is believed that this work is helpful for selecting desired fluidization conditions in practical applications, and this methodology can be expanded to the analysis of other complex systems with multi-scale characteristics.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 3","pages":"Article 104805"},"PeriodicalIF":4.2,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152800","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}

{"title":"Rational design of new micrometer-sized radiopaque composites embedded with electromagnetic shielding materials for transcatheter arterial embolisation against hepatocellular carcinoma","authors":"Lingling Chen ,&nbsp;Zhaoxiong Guo ,&nbsp;Mianrong Chen ,&nbsp;Ou Liu ,&nbsp;Qinglin Xiao ,&nbsp;Yongyan Ma ,&nbsp;Piaoyi Chen ,&nbsp;Yugang Huang ,&nbsp;He Wang ,&nbsp;Kangshun Zhu ,&nbsp;Guodong Ye","doi":"10.1016/j.apt.2025.104806","DOIUrl":"10.1016/j.apt.2025.104806","url":null,"abstract":"<div><div>Transcatheter arterial embolization (TAE) is a commonly used interventional procedure for hepatocellular carcinoma. However, the commonly used interventional embolization microspheres (e.g. polyvinyl alcohol) are unable to be observed under imaging devices and has to be visualized with exogenous contrast agents (e.g. iohexol), which may lead to intraoperative ectopic embolization. In this study, we synthesized poly(multi-allyl sucrose ether) visualization embolization microspheres encapsulating titanium carbide particles (TiC@PSAE) with sucrose backbone and encapsulated with electromagnetic shielding materials TiC. The synthesis method used in this study is a photo-driven radical-mediated cyclization reaction (PRMC), which enables the preparation of PSAE from sucrose multi-allyl ether monomers without degradation chain transfer. The morphology is spherical with a particle size range of 80–260 μm that can realize target embolization. Through <em>in vivo</em> rabbit experiments, the blood flow to the embolized kidneys is obstructed, and the embolized rabbit ears have a significant visualization effect under computed tomography (CT), demonstrating that TiC@PSAE microspheres have good imaging effects.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 3","pages":"Article 104806"},"PeriodicalIF":4.2,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151450","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}

{"title":"Study on the effect of acidification reaction conditions on the pore structure of coal samples based on 2D NMR T1-T2","authors":"Guanhua Ni ,&nbsp;Yingxue Cui ,&nbsp;Zhao Li ,&nbsp;Tao Yang ,&nbsp;Sicong Ma ,&nbsp;Xu Wang ,&nbsp;Huixin Qiu","doi":"10.1016/j.apt.2025.104792","DOIUrl":"10.1016/j.apt.2025.104792","url":null,"abstract":"<div><div>Acidification is one of the commonly used techniques to improve the efficiency of mine dust control. In order to study the effect of acidification conditions on the pore structure of the reservoir, coal acidification experiments were carried out at different temperatures and pressures, and the pore structure was quantitatively characterized by combining with NMR technology. The results showed that the porosity of coal samples increased from 5.8465% to 10.3502%; the signal peak intensity of 2D spectrum increased from 8.72 to 44.8; <em>φ_N</em> and <em>φ_NF</em> of coal samples were positively proportional to the acidification conditions, while <em>D</em>_T and <em>D</em>_F were inversely proportional to the temperature and pressure conditions. Therefore, increasing the acidification temperature and pressure conditions can effectively expand the pore space of coal and enhance the connectivity between pores. By changing the physical–chemical structure of the coal seam through acidification, the purpose of dust control at source can be achieved.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 3","pages":"Article 104792"},"PeriodicalIF":4.2,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152797","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}

{"title":"Temperature and radiation characteristics of the continuous injection flame of a zirconium dust cloud","authors":"Qiuhong Wang ,&nbsp;Bin Peng ,&nbsp;Jun Deng ,&nbsp;Chi-Min Shu ,&nbsp;Qingfeng Wang ,&nbsp;Guoqiang Dong ,&nbsp;Di Wu","doi":"10.1016/j.apt.2025.104781","DOIUrl":"10.1016/j.apt.2025.104781","url":null,"abstract":"<div><div>The exothermic properties of zirconium powder make it widely used in aerospace, military, atomic energy and other fields. The temperature and radiation characteristics of the continuous jet flame of zirconium dust cloud were studied by a self-designed experimental system. For the zirconium powder injection flame temperature, a comprehensive correction equation for thermocouple temperature measurement was developed for the continuous dust-feeding combustion particle load flow. When the dust cloud concentrations in the non-intermittent flame area are 328.48, 410.35, and 483.59 g/m³, respectively: at the spectral wavelength of 5.0 μm, the zirconium dust cloud jet flame emissivity values are 0.2, 0.19, and 0.18; the maximum flame temperature are 2147.5, 2248.1, and 2377.8 °C; the radiant heat flux characteristics of continuous jet flame of zirconium dust cloud were evaluated by heat flow meter, and the radiant heat fluxes on the surface of zirconium jet flame were calculated to be 42.82, 64.99, and 55.96 kW/m². It is found that the flame emissivity is linearly negatively correlated with the maximum flame temperature of the zirconium jet flame, and the thermal radiation is mainly concentrated in the jet flame body of the zirconium dust cloud.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 3","pages":"Article 104781"},"PeriodicalIF":4.2,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152213","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}

{"title":"A comprehensive study of flame retardancy of phosphorous functionalized graphene by microwave assistance for cotton fabric","authors":"Kshama D. Lokhande,&nbsp;Navin D. Satardekar,&nbsp;Mahesh P. Bondarde,&nbsp;Madhuri A. Bhakare,&nbsp;Pratik S. Dhumal,&nbsp;Surajit Some","doi":"10.1016/j.apt.2025.104786","DOIUrl":"10.1016/j.apt.2025.104786","url":null,"abstract":"<div><div>The increased number of fire accidents cause risk to human life, economy, and environment. There is an urgent need to design and develop efficient flame retardants to reduce the fire risks. Cotton clothes have been utilized in all human life to make them more convenient. But despite its wide utilization, its quick ignition makes it vulnerable to accidents. The present article is based on the preparation of covalently functionalized phosphorous grafting flame retardants for cotton fabric. The microwave irradiation facilitates the rapid synthesis of highly efficient flame retardant material from graphene oxide and polyphosphoric acid (PPA). In this method, in-situ basic reduced GO (BRGO) was synthesized and interacted with phosphorus functional groups, where negative counterparts of BRGO readily reacted with PPA leading to the formation of strong phosphorous and oxygen covalent bonds. The resultant P@BRGO is then coated on cotton fabric and checked for its flame retardancy by using spirit lamp test, vertical flammability test (VFT) and limiting oxygen index (LOI). The spirit lamp test reveals that the P@BRGO protected the cotton fiber from ignition for up to 754 s on continuous flame, while BRGO endowed cotton sustain for up to only 24 s. The mean LOI of P@BRGO/cotton is 43.14 % which is considerably higher than that of BRGO/cotton (23.04 %) and blank fabric (17.8 %). The present work reflects the easy preparation of RGO, which can be converted into value added, highly efficient FR material.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 3","pages":"Article 104786"},"PeriodicalIF":4.2,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152214","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}

{"title":"Hydrothermal assisted fabrication of ZnWO4:Yb3+/Er3+ nanophosphors with color tunable upconversion luminescence of enhanced thermal stability","authors":"Lijie Gao ,&nbsp;Yun Wang ,&nbsp;Meiting Li ,&nbsp;Xuejiao Wang ,&nbsp;Qi Zhu ,&nbsp;Ji-Guang Li","doi":"10.1016/j.apt.2025.104790","DOIUrl":"10.1016/j.apt.2025.104790","url":null,"abstract":"<div><div>ZnWO₄:Yb³⁺/Er³⁺ upconversion (UC) nanophosphors were successfully synthesized by hydrothermal reaction at 180 ℃ and subsequent calcination at 700 ℃ for crystallinity improvement and better incorporation of dopant ions. The phosphors were analyzed to emit green (∼533 nm; ²H_11/2 → ⁴I_15/2 transition of Er³⁺), green (∼546 nm; ⁴S_3/2 → ⁴I_15/2) and red (∼660 nm; ⁴F_9/2 → ⁴I_15/2) light under 980 nm laser excitation, all through a two-photon process. The incorporation of Na⁺ and K⁺, especially K⁺, was found to remarkably modify the UC performance of Er³⁺, in terms of red/green intensity ratio (luminescence color), fluorescence lifetime and thermal stability of luminescence, which was rationalized by considering ⁴F_7/2 + ⁴I_11/2 → ⁴F_9/2 cross relaxation and lattice defects/local structure. The optimal ZnWO₄:0.08Yb³⁺,0.02Er³⁺ phosphor, which contains ∼ 0.97 at.% Na⁺ and 0.16 at.% K⁺, was demonstrated to have the potential for optical temperature sensing with the thermally coupled ²H_11/2/⁴S_3/2 energy levels of Er³⁺.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 3","pages":"Article 104790"},"PeriodicalIF":4.2,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152799","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}