Advanced Powder Technology最新文献

{"title":"Facile sonochemical preparation of γ-AlOOH nanopowder via corrosion and erosion of Al coarse particles","authors":"Toshiki Yamanaka,&nbsp;Yamato Hayashi,&nbsp;Hirotsugu Takizawa","doi":"10.1016/j.apt.2025.104890","DOIUrl":"10.1016/j.apt.2025.104890","url":null,"abstract":"<div><div>Boehmite (γ-AlOOH) nanopowders were facilely synthesized at room temperature by sonochemical corrosion and erosion of Al particles. After 24 h of sonication in N₂H₄·H₂O, Al powders were completely converted into γ-AlOOH nanopowders. The obtained γ-AlOOH particles had an average diameter of 158.2 nm in 0.1 M NaOH aqueous solution, and a specific surface area of 360.9 m²/g. In contrast, γ-AlOOH powders were not obtained after magnetic stirring of Al powders in N₂H₄·H₂O at 30 °C, indicating that sonochemical effects (hotspots, microjets and shock waves) significantly facilitated the corrosion reaction and surface erosion of Al, resulting in the formation of γ-AlOOH nanocrystals. The isoelectric point and adsorption rate of γ-AlOOH toward Congo red (CR) were also investigated. γ-AlOOH nanopowders exhibited an adsorption capacity of 100.0 mg/g after 60 min of stirring with a 100 mg/L CR solution at pH 8.70. The sonochemical process involving Al powders and N₂H₄·H₂O is preferable synthetic route for preparing γ-AlOOH nanopowders due to its simplicity.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104890"},"PeriodicalIF":4.2,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848122","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":"Research on the corresponding relationship between the seepage range and inhibition range of composite long acting blocking liquid in coal body","authors":"Wenlin Li ,&nbsp;Lulu Sun ,&nbsp;Weimin Cheng ,&nbsp;Gang Wang ,&nbsp;Qiming Huang ,&nbsp;Guansheng Qi","doi":"10.1016/j.apt.2025.104897","DOIUrl":"10.1016/j.apt.2025.104897","url":null,"abstract":"<div><div>To address the technical challenge of difficulty in visually monitoring the seepage range and quantitatively determining the inhibition range during the application of in-situ inhibition processes, a fluorescence tracing technique was employed to conduct a visualization monitoring experiment of the seepage range for in-situ inhibition at the Dongtan Coal Mine 6303 working face, and to establish the corresponding relationship between the seepage range and the inhibition range. This study conducted on-site application of in-situ inhibition processes at the Dongtan Coal Mine 63下03 working face. Coal samples were collected from monitoring points 1#, 2#, and 3#, which were drilled perpendicular to the coal wall, based on the actual fluid injection conditions on-site. These samples were then taken to the laboratory for programmed temperature rise experiments and fluorescence spectrophotometry experiments. The corresponding relationship between the seepage range and the inhibition range was constructed using the inhibition rates and fluorescence intensities obtained from the experiments. The results indicate that the inhibition rates at monitoring points 1#, 2#, and 3# exhibit similar trends, showing an initial increase followed by a decrease with increasing drilling depth. The maximum inhibition effect is achieved at a depth of 8 m for all three points. Monitoring point 1# has an inhibitory effect at depths of 8–16 m, while point 2# shows effectiveness at 8–14 m. No inhibitory effect was observed in the samples taken from monitoring point 3#. By fitting the relationship between the inhibition rate and fluorescence intensity, a relationship equation based on full-scale fluorescence intensity and inhibition rate was obtained, determining the seepage range and inhibition range of the inhibitory fluid within the coal body and their corresponding relationship, which plays an important guiding role in the efficient implementation of coal seam fluid injection.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104897"},"PeriodicalIF":4.2,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842791","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":"Preparation of hydrophobic drug microcapsules via an intensified supercritical extraction of emulsion method: Phase behavior investigation and emulsion formula regulation","authors":"Fengxia Liu,&nbsp;Renqing Su,&nbsp;Yufei Li,&nbsp;Yawen Ji","doi":"10.1016/j.apt.2025.104893","DOIUrl":"10.1016/j.apt.2025.104893","url":null,"abstract":"<div><div>Some hydrophobic natural drugs with high added values are promising in clinical applications, while their poor water-solubility becomes a major restriction for the bioavailability. To overcome this problem, the size-reducing strategy is a favorable approach. Herein, model paclitaxel (PTX)@poly (lactide-co-glycolic acid) (PLGA) microcapsules are fabricated by an intensified supercritical extraction of emulsion (SFEE) method. The phase behaviors of carbon dioxide (CO₂)/emulsion system during extraction are investigated to interpret the effects of operation parameters on the extraction. Besides, the emulsion formulas on microcapsule properties are examined experimentally as well. The results indicate that supercritical parameters above the mixture critical point (&gt; 8 MPa at 313 K, for example) enables the great phase mixing of oil phase and CO₂, thus the effectiveness of emulsion extraction can be guaranteed. Besides, the PLGA mass concentration (<em>c</em>_PLGA) and water/oil ratio variations are also proved to favorably adjust the size, encapsulation efficiency, and drug loading of microcapsules.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104893"},"PeriodicalIF":4.2,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842790","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":"Subgrid scale gas-particle stress model-based simulation of dense particle flows in a bubbling fluidized bed","authors":"Yang Liu ,&nbsp;Zhao Yan ,&nbsp;Guohui Li ,&nbsp;Jiatong Liu ,&nbsp;Xue Liu ,&nbsp;Lixing Zhou","doi":"10.1016/j.apt.2025.104885","DOIUrl":"10.1016/j.apt.2025.104885","url":null,"abstract":"<div><div>A novelty gas-particle stress model at subgrid scale level is proposed to consider the effect of gas turbulence on particle motions. The anisotropic characteristics of interaction between gas and particles are described by using a second-order moment model, the modeling of particle–particle collision is based on the kinetic theory of granular flow and the four-way coupling strategy is combined. A large eddy simulation is established to predict particles and bubble movements in a small-scale fluidized bed, simulation results are well agreed with the experimental data and the proposed model is validated. Results show that bubblelike granular temperature is greater than smaller-scale particle granular temperature and the flow patterns of two-phase turbulence are heterogeneously. Bubble motions have a great effect on particle dynamics. The distributions of axial and horizontal velocities of particles at center, middle and wall regions are approaching the normal distributions. The largest dominant frequency of particle concentration is 34.2 Hz at central region of lower bed height, approximately 1.3 times larger than that of wall region. Maximum ratios of wall to those central values are 8.3 for axial particle velocities.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104885"},"PeriodicalIF":4.2,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842789","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)00099-8","DOIUrl":"10.1016/S0921-8831(25)00099-8","url":null,"abstract":"","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 5","pages":"Article 104878"},"PeriodicalIF":4.2,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835024","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":"Full title (Editorial Board Members)","authors":"","doi":"10.1016/S0921-8831(25)00100-1","DOIUrl":"10.1016/S0921-8831(25)00100-1","url":null,"abstract":"","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 5","pages":"Article 104879"},"PeriodicalIF":4.2,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835025","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":"Heterostructure-reinforced CoCrFeNiTax (x = 0.5 and 1) high-entropy alloy coatings fabricated by combining mechanical alloying and hot-pressing sintering","authors":"Qingtao Sun ,&nbsp;Zihan Han ,&nbsp;Dong Wan ,&nbsp;Xingyu Zhou ,&nbsp;Wensheng Ma ,&nbsp;Yan Wang","doi":"10.1016/j.apt.2025.104891","DOIUrl":"10.1016/j.apt.2025.104891","url":null,"abstract":"<div><div>The high-performance CoCrFeNiTa_0.5 (Ta0.5) and CoCrFeNiTa (Ta1) high-entropy alloy coatings (HEACs) consolidated on the Q235 substrate were synthesized via mechanical alloying and vacuum hot-pressing sintering. The final milled Ta0.5 and Ta1 powders consist of dual body-centered cubic phases, with the Ta1 powder additionally containing an amorphous phase. Both HEACs comprise double face-centered cubic solid-solution matrix with intermetallic compound. Distinct precipitate distribution patterns are observed across four characteristic regions: the transition boundary, fine-grained layer, coarse-grained layer, and normal region. These microstructural features contribute to excellent interfacial bonding, as evidenced by the bending strengths of 586 MPa (Ta0.5) and 531 MPa (Ta1). Due to the thicker fine-grained layer adjacent to the substrate, the Ta0.5 coating exhibits superior resistance to shearing forces and bending moment, resulting in higher bending strength. The Ta1 coating achieves optimized microhardness, showing 256 % and 28 % improvements over the substrate and Ta-free CoCrFeNi coating, respectively. Furthermore, wear resistance tests confirm that both HEACs outperform the substrate. The enhanced microhardness and wear resistance are attributed to solid-solution strengthening (from larger Ta atoms), second-phase strengthening (via nanoscale Laves phases), and the synergistic effect of the dual FCC matrix with uniformly distributed nanoscale hard phases. Electrochemical corrosion tests display that both HEACs demonstrate superior comprehensive corrosion resistance in a 3.5 wt% NaCl solution, primarily due to the formation of protective Ta oxides.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104891"},"PeriodicalIF":4.2,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834174","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":"Preparation and characterization of a special high speed steel powder prepared by plasma rotating electrode process","authors":"Jipeng Jiang ,&nbsp;Shaoqiang Li ,&nbsp;Yunjin Lai ,&nbsp;Qingxiang Wang ,&nbsp;Shujin Liang","doi":"10.1016/j.apt.2025.104886","DOIUrl":"10.1016/j.apt.2025.104886","url":null,"abstract":"<div><div>A T15 high speed steel (HSS) powder was successfully prepared by plasma rotating electrode process (PREP). MC (M is V primarily), M₂C (M refers to W mainly), α-Fe and γ-Fe phases were observed in the powder particle. Both primary dendritic and cellular crystals were found due to the cooling rate of 10³-10⁵ K/s. The cooling rate for a small amount of fine powder particles such as &lt; 45 μm and a few coarse powder particles such as &gt; 250 μm achieves 10⁵ K/s and 10³ K/s class, respectively, and that of other powder particles attains 10⁴ K/s level. The PREP HSS powder displays low impurity content, good fluidity, uniform composition, sphericity and no satellite powder, which is expected to replace commercial gas atomization powder, and has promising application prospect in the production of dense HSS parts with ultra-high performance.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104886"},"PeriodicalIF":4.2,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828642","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":"Role of ultraviolet modification in enrichment and upgrading of graphite ores via triboelectric separation","authors":"Jingfeng He,&nbsp;Zilin Zhang,&nbsp;Lixiang Fu,&nbsp;Helang Xu,&nbsp;Lingtao Zhu,&nbsp;Bin Yang","doi":"10.1016/j.apt.2025.104870","DOIUrl":"10.1016/j.apt.2025.104870","url":null,"abstract":"<div><div>Graphite is an important mineral resource, in this era of growing global demand for high-grade graphite, the advancement of its purification and separation technology is of great significance. This paper focused on the enhancement of ultraviolet (UV) modification on the enrichment and purification of graphite ores. Through charge-to-mass ratio sensing, SEM and FTIR, it was found that the superficial properties of the modified graphite particles were smoother and flatter, and the amount of O-containing functional groups connected with C was reduced, which strengthened the full contact between graphite particles and friction rods with the graphite’s charging ability and improved the charge-to-mass ratio of graphite minerals. Accordingly, UV irradiation significantly improved the triboelectric separation performance, in which the separation efficiencies of graphite ores increased by up to 14.14 %. This work provided crucial information for resource purification and impurity elimination of graphite ores.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104870"},"PeriodicalIF":4.2,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823895","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":"Effect of additives and operating conditions on tablet weight variation: Analysis based on powder flowability","authors":"Yozo Kudo ,&nbsp;Tsukasa Nakanishi ,&nbsp;Akira Uno ,&nbsp;Shuji Matsusaka","doi":"10.1016/j.apt.2025.104860","DOIUrl":"10.1016/j.apt.2025.104860","url":null,"abstract":"<div><div>The flowability and compressibility of powders during tableting are crucial for determining the quality of pharmaceutical products. Although silicon compounds are additives that improve compressibility, their type and addition ratio could impair flowability. Therefore, formulation and operating conditions for tablet preparation should be considered. In this study, first, the physical properties of the four types of silicon compounds, that is, particle size distribution, packing fraction, and cohesion, were measured. Next, various powder mixtures were prepared by adding each silicon compound to a diluent at different ratios. Experiments were performed by changing the operating conditions of a rotary tableting machine equipped with a paddle feeder. The tablet weight variation increased with the addition of a highly cohesive silicon compound. However, this variation decreased with an increase in the peripheral velocity of the paddle. A flowability index combining static and dynamic friction properties was proposed to analyze the experimental results, allowing the quantification of the effects of silicon compounds and operating conditions on tablet weight variation.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104860"},"PeriodicalIF":4.2,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815706","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}