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Showing 1 to 20 of 22 for “"Fine Powder"”.
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Improvement of Fluidization Ability for Group A Powders by Fine Powder Additives
Group A powders are widely utilized in the industry because of the great quality of fluidization, which can be affected by the fine content. This project investigates the feasibility that employing the fine powders (≤ 20 μm) as additives to further improve the fluidization ability of Group A …
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A new constitutive and numerical model for arching of cohesive powders in hoppers
… in production plants which store and handle fine powder. The collapses not only cost financially to settle for compensation, also cost companies' reputation and credibility for partnership. Industry experts believe that the high frequency of silo failures are mainly due to “shortcomings in …
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Optimizations and recycling industrial waste (palm oil fly ash) as a pigment in coating technology
… mixed with 25 % wt sulphur, 10 % wt graphite fine powder and 20 % wt calcium hydroxide was sintered at 700 – 800 °C to produce a complete crystalline product. The sintered product was milled and become grayish fine powder pigment. From the SEM images, the grain size approximately 0.404 µm. The …
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Mechanical and thermo-mechanical properties of particulate reinforced composites made from dry powder-power blends
… particulate reinforced composites from dry powder-powder blends was developed. The process was designed to exploit the nature of fine powder constituent materials, such that the energy input during the molding process could be reduced. Polymer and reinforcement materials were chosen, …
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Evaluation and design of polymer systems for enhanced microwave heating
… also evaluated. By milling the reactants to a fine powder, and mixing them completely, the extent to which diffusion limited the process was significantly reduced: increased milling resulted in higher activation energies. In addition to the inherent advantages of solid-state processing. it Is …
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Computational-Experimental Process Development for Laser Powder Bed Fusion Additive Manufacturing
Laser powder bed fusion (LPBF) additive manufacturing (AM) is instrumental for advances in high-value industries such as aerospace and medical devices. However, widespread adoption is still held back, in part due to challenges with powder handling, identification of process parameters, part …
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Direct determination of cadmium and beryllium in coal and fly ash slurries using graphite furnace atomic absorption spectrometry
… preparation involved grinding the sample to a fine powder and slurrying it in a suitable solvent. Stable slurries were maintained by magnetic stirring during sampling. Pyrolytically coated graphite tubes were used for cadmium determinations, while beryllium was determined with platform …
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Fabrication of a novel radiopharmaceutical: lutetium-177 loaded MCM-41mesoporous silica
… oven at 100 [degree sign]C for 12 h. Grounded powder was calcined in furnace at 550 ?C for 5 hours to remove the surfactant. And then MCM-41 solution was prepared by its fine powder in MilliQ water to give a concentration of 50 mg/ml. The reaction mixture consisted of a 150 [micro]l aliquot of …
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Cold model of a vibrated-bed microreactor capable of varying Peclet number at fixed weight hourly space velocity providing a tool for simulating an important feature of the reaction kinetic scene in large catalytic fluid beds
… is achieved by subjecting a shallow layer of a fine powder to vertical sinusoidal vibration. The microreactor comprises a rectangular horizontal duct, 12.7 mm in height, 25.4 mm in width, variable in length, and with nonporous floor and walls. The microreactor is charged with a powder, such as …
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Fabrication and Properties of Bi1/2Na1/2TiO3 Based Ferroelectric Ceramics with Low Levels of B-site Additives
… to form a perovskite structure, ground to a fine powder, pressed into tablets and sintered to form dense ceramics. XRD analysis confirmed the formation of the perovskite phase. The electro-mechanical properties of the ceramics were evaluated. There were improvements in the low-field room …
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The investigation of soil dielectric influence towards terrestrial background radiation
… the samples were dried, grinded and sieve into fine powder for the elemental compositions and dielectric properties measurement. The correlation between terrestrial radiation and dielectric property of soils were measured statistically to measure the significance between each parameter study. …
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Characterizing and mitigating scattering effects in terahertz time domain spectroscopy measurements.
… such as milling the material of interest into fine powder and time domain averaging spatially disjoint or multiple sample measurements, in order to reduce the presence of scattering features and effects in the THz-TDSmeasurements. Recognizing the invasive access and/or specializedmeasurement …
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Low-Cost Electrochemical Approaches to Deep-Decarbonization
… concentrated gas streams of H₂ and O₂/CO₂. The fine powder Ca(OH)₂ that is generated in the reactor is then used to synthesize the majority cementitious phase in cement. Approaches to use the concentrated gas streams from this process may be used synergistically with other processes under …
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Advances in the Stille reaction and new methods for continuous flow Pd-catalyzed C-N bond forming reactions
… and XPhos in a 1:1.1 ratio were milled into a fine powder that was used as pre-catalyst for these reactions. Chapter 2: A catalyst system for the Stille cross-coupling reactions of aryl mesylates and tosylates is reported. Using the combination of Pd(OAc)2, XPhos, and CsF in t-BuOH an array of …
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Additive Manufacturing of Copper via Binder Jetting of Copper Nanoparticle Inks
… and shape distortion during sintering, the powder bed voids were filled with smaller particles to improve the powder packing density. Through the investigation of a bimodal particle size powder bed and nanoparticle binders, this work aims to develop an understanding of (i) the relationship …
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Effect of chromium (cr) particle size and span-20 surfactant on Aisi d2 hardened steel using electrical discharge machining
… and poor surface quality. Therefore, Powder Mixed Electrical Discharge Machining (PMEDM) has emerged as one of the advanced and innovative technique to eliminate the some of the disadvantages of EDM method. The fine powder particles are added into the tank then the spark gap is filled …
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On the development of new PolyArylEtherKetone bulk solids for Powder Bed Fusion
Powder Bed Fusion (PBF) of polymers, a form of Additive Manufacturing (AM) is an established manufacturing process where fine powdered materials are consolidated by an energy source to form polymeric parts without the need for moulds or tooling. A requirement of the process is a fine powder …
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SENSING CHARACTERISTICS AND MATHEMATICAL MODELLING OF PLANT TISSUE POLYPHENOLASE SENSORS
… with a biofilm containing pretreated tissue powder of apple, potato, banana or mushroom. During the pretreatment, the tissue was fragmented, exposed to air, washed with water, vacuum dried and pulverised to a fine powder. These sensors showed significantly higher sensitivity (0.0248-0.0347 µA …
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The sorption fate of active pharmaceutical ingredients in soils receiving high wastewater inputs and implications for risk assessments
… destroyed the soil structure, turning it into a fine powder and significantly increasing DOC. Sodium azide changed the pH of the loam soil but not the sandy loam soil. Literature suggested that gamma irradiation was the most likely to sterilise the soils with the least amount of disturbance to …
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Synthesis, Microstructure and Mechanical Properties of Titanium with Controlled Levels of Porosity
… Ti slurry was developed from 43 vol.% of Ti powder, 0.3 dw.% of dispersant, 0.8 dw.% of plasticiser and 0.8 dw.% of binder, mixed with a balance of distilled water, which produced a viscosity of 290 cP. It was then poured into a plaster mould to form compacts with a green density of 45%. …
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