aeration and mixing behaviours of nanosized powders under

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Jul 12, 2010  The sound assisted aeration of two nano-sized powders, Al 2 O 3 (40. nm) and CuO (33 nm), have been investigated in a laboratory scale fluidized bed.. Acoustic fields of intensities larger than 135 dB and frequencies in the range 100–125 Hz are required to obtain a homogeneous fluidization.Under these conditions mixing between powders has been qualitatively characterized

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The aeration and mixing behaviours of two nano-sized powders, Al 2 O 3 (40. nm) and CuO (33 nm), have been investigated in a laboratory scale fluidized bed.. The fluidization quality of both powders is very poor without application of acoustic fields.

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Ammendola and Chirone [10] studied aeration and a mixing behavior of the nano-sized powders under the sound vibration. The bed expansion ratio was also used for an index of the fluidization ...

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Aeration and mixing behaviours of nano-sized powders under sound vibration. Powder Technology, 2010. Riccardo Chirone. Paola Ammendola. Download PDF. ... 37 Full PDFs related to this paper. Read Paper. Aeration and mixing behaviours of nano-sized powders under sound vibration ...

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AERATION AND MIXING BEHAVIOURS OF BINARY MIXTURES

AERATION AND MIXING BEHAVIOURS OF BINARY MIXTURES OF NANO-SIZED POWDERS UNDER SOUND VIBRATION P. Ammendola and R. Chirone Istituto di Ricerche sulla Combustione – CNR P. le Tecchio 80, 80125 Napoli, Italy T: +39-0817682245; F: +39-0815936936; E: [email protected] ABSTRACT The aeration behaviour of three different nano-sized powders

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CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The aeration behaviour of three different nano-sized powders, Al2O3, Fe2O3 and CuO, fluidized under the application of acoustic fields of different intensities (125-150 dB) and frequencies (50-300 Hz) has been characterized. The characterization of the fluidization of binary mixtures of Al2O3 and Fe2O3 has been also ...

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The aeration behaviour of three different nano-sized powders, Al2O3, Fe2O3 and CuO, fluidized under the application of acoustic fields of different intensities (125-150 dB) and frequencies (50-300 ...

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Mixing and characterization of nanosized powders: An ...

Key words: mixing, characterization, nanoparticles, dry particle processing, RESS Abstract The objective of this paper was to gain an understanding of the mixing and characterization of nanosized powders. Three different nanosized material systems were selected based on their physical and chemical properties. Mixing

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Mar 01, 2011  The present work is focused on the characterization of the aeration behaviour of two different nanopowders, Al 2 O 3 and Fe 2 O 3, under the application of acoustic fields of different intensities (125–150 dB) and frequencies (50–300 Hz). The two nanopowders showed slightly different behaviours; in particular, Fe 2 O 3 is generally characterized by a better fluidization quality.

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Aeration of Analysis of the Nano-Sized Powders figures shows that without the application of acoustic field no mixing occurs (Fig.7B). Channelling is present and, as a result of stratification of particles of different densities, there is formation of one or more channels with transport of lighter powder

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AERATION AND MIXING BEHAVIOURS OF BINARY MIXTURES

AERATION AND MIXING BEHAVIOURS OF BINARY MIXTURES OF NANO-SIZED POWDERS UNDER SOUND VIBRATION . By Paola Ammendola and R. Chirone. Get PDF (385 KB) Abstract. The aeration behaviour of three different nano-sized powders, Al2O3, Fe2O3 and CuO, fluidized under the application of acoustic fields of different intensities (125-150 dB) and frequencies ...

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Fluidization of binary mixtures of nanoparticles under the ...

Mar 01, 2011  The present work is focused on the characterization of the aeration behaviour of two different nanopowders, Al 2 O 3 and Fe 2 O 3, under the application of acoustic fields of different intensities (125–150 dB) and frequencies (50–300 Hz). The two nanopowders showed slightly different behaviours; in particular, Fe 2 O 3 is generally characterized by a better fluidization quality.

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Nanopowder Fluidization and Mixing Under the Effect of ...

Under the operating conditions tested, mixing between aggregates of the two powders takes only few minutes. However, mixing also occurs inside aggregates but this process requires larger times, of ...

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"Sound Vibration during Aeration of Nano-Sized Powders" by ...

The behaviour of two different nano-sized powders, Al2O3 (40 nm) and SiO2 (15 nm), during aeration has been investigated in a laboratory scale fluidized bed. The fluidization quality of both powders is very poor without application of acoustic fields even if some bed expansion has been found. The application of acoustic fields of intensities larger than 135 dB and frequencies close to 120 Hz ...

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(PDF) Effect of mixture composition, nanoparticle density ...

[9] P. Ammendola, R. Chirone, Aeration and mixing behaviours of nano-sized pow- Finally, the beneficial effect of sound intensity on mixing qual- ders under sound vibration, Powder Technol. 201 (2010) 49–56. ity, due to the enhancement of the external force yielded by the [10] P. Ammendola, R. Chirone, F. Raganati, Fluidization of binary ...

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Effect of mixture composition, nanoparticle density and ...

Aug 01, 2011  Graphical abstract. The investigation on the sound efficiency to promote the mixing of two nano-sized powders, Al 2 O 3 and Fe 2 O 3, having a primary density of about 4000 kg/m 3, has been carried out.In particular, the effect of the binary mixture composition has been highlighted by performing three tests with the application of a fixed acoustic field (130 dB–120 Hz) and varying the ...

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Fundamental particle fluidization behavior and handling of ...

The aeration and mixing behaviours of two nano-sized powders, Al2O3 (40nm) and CuO (33nm), have been investigated in a laboratory scale fluidized bed. ... it is necessary to develop processing ...

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Nanoparticle mixing through rapid expansion of high ...

Apr 12, 2011  Ammednola P, Chirone R (2010) Aeration and mixing behaviours of nano-sized powders under sound vibration. Powder Technol 201:49–56. Article Google Scholar Baldyga J, Orciuch W, Makowski L, Malski-Brodzicki M, Malik K (2007) Break up of nano-particle clusters in high-shear devices. Chem Eng Process 46(9):851–861

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[PDF] Environmentally benign dry mechanical mixing of nano ...

article i nfo The effectiveness of magnetically assisted impaction mixing (MAIM), an environmentally benign mechanical process, in mixing SiO2+TiO2 and SiO2+Al2O3 nanoparticle mixtures has been examined. Experiments were carried out at different magnet-to-sample weight ratios, processing times, and magnet sizes. The homogeneity of mixing (HoM) was evaluated at the micron scale using field ...

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Mixing Index - an overview ScienceDirect Topics

Example 7.4. A pharmaceutical firm prepares a powder mixture for subsequent compaction into tablets; 22 kg of the active principle and 78 kg of an inert excipient are put into a powder mixer and mixed for 7 minutes at constant speed.Ten samples of the mixture, each weighing 20 g, were analyzed for the active principle content. The results, in weight percent, were: 21.8, 21.8, 23.0, 21.4, 22.3 ...

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Aluminum foam made via a new method based on cold gas ...

May 01, 2016  Aeration and mixing behaviours of nano-sized powders under sound vibration Powder Tech. , 201 ( 2010 ) , pp. 49 - 56 Article Download PDF View Record in Scopus Google Scholar

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Role of Sound Vibration during Aeration of Nano-Sized Powders

The behaviour of two different nano-sized powders, Al2O3 (40 nm) and SiO2 (15 nm), during aeration has been investigated in a laboratory scale fluidized bed. The fluidization quality of both powders is very poor without application of acoustic fields even if some bed expansion has been found.

Get price

US20070108320A1 - System and method for nanoparticle and ...

With the coupling of an external field and aeration (or a flow of another gas), nanoparticles can be smoothly and vigorously fluidized. A magnetic force and/or pre-treatment may be employed with the fluidizing gas and, when coupled with a fluidizing medium, provide excellent means for achieving homogenous nanofluidization. The magnetic force interacts with non-fluidizing magnetic particles and ...

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Review of corrosion interactions between different ...

Nov 11, 2020  This review covers the corrosion interactions between different materials that are relevant to the disposal of high-level nuclear waste, in particular the

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Fluidization of nanopowders: a review SpringerLink

Feb 10, 2012  Ammendola P, Chirone R (2010) Aeration and mixing behaviours of nano-sized powders under sound vibration. Powder Technol 201(1):49–56 CAS Article Google Scholar

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Process Study of Nanosized Powder Dispersion for DEFC ...

The process of obtaining a uniform dispersion of nanosized powders by applying two step process of mixing and adjusting viscosity was studied. The mixed paste was used as the electrode of direct ethanol fuel cells (DEFC). And power density of the fuel cells was measured. A high power density was realized by addition of acetone and propanol solvents to nanosized silica powder.

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Fluidization of nanopowders: a review. - Abstract - Europe PMC

Feb 10, 2012  Ammendola P, Chirone R. Aeration and mixing behaviours of nano-sized powders under sound vibration. Powder Technol. 2010; 201 (1):49–56. [Google Scholar] Auffan M, Rose J, Bottero JY, Lowry GV, Jolivet JP, Wiesner MR. Towards a definition of inorganic nanoparticles from an environmental, health and safety perspective. Nat Nanotechnol.

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Nanoparticle mixing through rapid expansion of high ...

Apr 12, 2011  Ammednola P, Chirone R (2010) Aeration and mixing behaviours of nano-sized powders under sound vibration. Powder Technol 201:49–56. Article Google Scholar Baldyga J, Orciuch W, Makowski L, Malski-Brodzicki M, Malik K (2007) Break up of nano-particle clusters in high-shear devices. Chem Eng Process 46(9):851–861

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Transparent Nd:YAG Ceramics Fabricated Using Nanosized γ ...

nanosized c-Al 2O 3 and Y 2O 3 powders as the starting materials. Reaction sequences and sintering behaviors of the powder mix-ture were characterized by X-ray diffractometry and dilatome-try. One feature of the solid reactions involving c-Al 2O 3 is the occurrence of hexagonal YAlO 3, which is unstable and transforms to perovskite YAlO

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(PDF) Fluidization of nanopowders: a review Robert ...

Huang C, Wang Y, Wei F (2008) Solids mixing behavior in a Powder Technol 163(1–2):41–50 nano-agglomerate fluidized bed. Powder Technol 182(3): Li Y, Somorjai GA (2010) Nanoscale advances in catalysis and 334–341 energy applications.

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[PDF] Environmentally benign dry mechanical mixing of nano ...

article i nfo The effectiveness of magnetically assisted impaction mixing (MAIM), an environmentally benign mechanical process, in mixing SiO2+TiO2 and SiO2+Al2O3 nanoparticle mixtures has been examined. Experiments were carried out at different magnet-to-sample weight ratios, processing times, and magnet sizes. The homogeneity of mixing (HoM) was evaluated at the micron scale using field ...

Get price

Mixing Index - an overview ScienceDirect Topics

Example 7.4. A pharmaceutical firm prepares a powder mixture for subsequent compaction into tablets; 22 kg of the active principle and 78 kg of an inert excipient are put into a powder mixer and mixed for 7 minutes at constant speed.Ten samples of the mixture, each weighing 20 g, were analyzed for the active principle content. The results, in weight percent, were: 21.8, 21.8, 23.0, 21.4, 22.3 ...

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International Journal of Minerals, Metallurgy and Materials

International Journal of Minerals, Metallurgy and Materials (IJMMM, ISSN 1674-4799, CN 11-5787/TF, monthly, started in 1994, formerly known as Journal of University of Science and Technology Beijing) is an international journal devoted to publishing original research articles (and occasional invited reviews) on all aspects of minerals processing, physical metallurgy, process metallurgy, and ...

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Simulation of Micro/Nanopowder Mixing Characteristics for ...

To understand the mixing of micro/nanosized powders which represent the AM, BPA, and CPA powders, a DEM model for adhesive fine particles has been developed. Due to the particle sizes being in the nanometer to micrometer size range, the proposed simulation model is heavily dependent on the surface adhesive force interactions between the ...

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The Chinese Journal of Process Engineering

The distribution and fluctuation of the light intensity in a liquid-solid and three-phase fluidized bed are influenced by the fluid flow under the illumination of external parallel light. The mathematical models of the light intensity distribution in liquid-solid and three-phase flat fluidized beds are established based on the Lambert-Beer law.

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(PDF) Effect of sound vibration and pre-mixing with group ...

Improvement of the fluidizability of cohesive powders through mixing with small proportions of group a particles. By MUHAMMAD ASIF. Fluidization of nanopowders: a review. By Robert Pfeffer. Evaluation of Assisted Fluidization of Nanoagglomerates by Monitoring Moisture in

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US20070108320A1 - System and method for nanoparticle and ...

With the coupling of an external field and aeration (or a flow of another gas), nanoparticles can be smoothly and vigorously fluidized. A magnetic force and/or pre-treatment may be employed with the fluidizing gas and, when coupled with a fluidizing medium, provide excellent means for achieving homogenous nanofluidization. The magnetic force interacts with non-fluidizing magnetic particles and ...

Get price

Nanomaterials for wastewater treatment: Concluding remarks ...

Jan 01, 2021  Furthermore, various nanotechnology-based processes have been developed for the wastewater treatment and are depicted in Fig. 37.1.Those are adsorption, photocatalytic processes, membrane-based processes, antimicrobial nanomaterial-based processes, etc. Various novel developed nanomaterials are being used in these processes that are used for wastewater treatment processes.

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