Synthesis of nano-crystalline spherical cobalt–iron (Co–Fe) alloy particles by ultrasonic spray pyrolysis and hydrogen reduction

Gürmen, Sebahattin; Güven, Aybars; Ebin, Burçak; Stopić, Srečko; Friedrich, Bernd

doi:10.1016/j.jallcom.2009.03.046

Cited by 39 publications

(25 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main reason for the slightly variation of the average particle sizes is the sintering effect arising from temperature-residence time relation, as explained. The obtained particles were mainly in submicron size, and those are the aggregates of the primary nucleated nanosized particles, as also observed in the previous studies on production of metallic [43,45] and alloy [2,46] particles. The theoretically calculated particle size for CuNiIn alloy is 279 nm.…”

Section: Cuniin Alloy Particlessupporting

confidence: 84%

“…[1], [2], and [3]). The Gibbs free energy (DG°) for the reaction given in equations above in the temperature range from 273 K to 1473 K (0°C to 1200°C) confirms the probability for the formation of CuNi and CuNiIn by USP-HR.…”

Section: A Thermodynamic Analysis Of Hydrogen Reductionmentioning

confidence: 99%

“…The properties depend on the particular specifications, such as particle size and size distribution, chemical and phase composition, atomic arrangement, and surface/volume ratio. [1][2][3][4] Among various nanoalloys, CuNi and CuNiIn alloy particles received particular interest in the recent years due to their unique properties. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] In the case of CuNi alloys, a high corrosion and wear resistant can be seen, as well as excellent electrical and thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Single-Step Production of Nanostructured Copper-Nickel (CuNi) and Copper-Nickel-Indium (CuNiIn) Alloy Particles

Apaydin

Ebin

Gürmen

2016

Metall Mater Trans A

View full text Add to dashboard Cite

RAMAZAN OG UZHAN APAYDIN, BURÇ AK EBIN, and SEBAHATTIN GÜ RMENNanostructured copper-nickel (CuNi) and copper-nickel-indium (CuNiIn) alloy particles were produced from aqueous solutions of copper, nickel nitrates and indium sulfate by hydrogen reduction-assisted ultrasonic spray pyrolysis. The effects of reduction temperatures, at 973 K, 1073 K, and 1173 K (700°C, 800°C, and 900°C), on the morphology and crystalline structure of the alloy particles were investigated under the conditions of 0.1 M total precursor concentration and 0.5 L/min H 2 volumetric flow rate. X-ray diffraction studies were performed to investigate the crystalline structure. Particle size and morphology were investigated by scanning electron microscope and energy-dispersive spectroscopy was applied to determine the chemical composition of the particles. Spherical nanocrystalline binary CuNi alloy particles were prepared in the particle size range from 74 to 455 nm, while ternary CuNiIn alloy particles were obtained in the particle size range from 80 to 570 nm at different precursor solution concentrations and reduction temperatures. Theoretical and experimental chemical compositions of all the particles are nearly the same. Results reveal that the precursor solution and reduction temperature strongly influence the particle size of the produced alloy particles.

show abstract

Section: Cuniin Alloy Particlessupporting

confidence: 84%

Section: A Thermodynamic Analysis Of Hydrogen Reductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Single-Step Production of Nanostructured Copper-Nickel (CuNi) and Copper-Nickel-Indium (CuNiIn) Alloy Particles

Apaydin

Ebin

Gürmen

2016

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…Synthesized ZnO particles were collected in a washing bottle filled with ethanol. Details of the synthesis procedure can be found elsewhere [19,20]. To characterize nanostructured ZnO particles, ethanol was evaporated in a drying oven at 70 • C for 300 s. A summary of the process parameters is illustrated in Table 1.…”

Section: Synthesis Of Zinc Oxide Particlesmentioning

confidence: 99%

Tuning the Morphology of ZnO Nanostructures with the Ultrasonic Spray Pyrolysis Process

Emil

Alkan

Gürmen

et al. 2018

Metals

Self Cite

View full text Add to dashboard Cite

Nanostructured zinc oxide (ZnO) particles were synthesized by the one step Ultrasonic Spray Pyrolysis (USP) process from nitrate salt solution (Zn(NO 3 ) 2 ·6H 2 O). Various influential parameters, from Zn(NO 3 ) 2 ·6H 2 O concentrations (0.01875-0.0375 M) in the initial solution, carrier gas (N 2 ) flow rates (0.5-0.75 L/min) to reaction temperature (400-800 • C), were tested to investigate their role on the final ZnO particles' morphology. For this purpose, Scanning Electron Microscopy (SEM), High Resolution Transmission Electron Microscopy (HRTEM) and (Selected Area Electron Diffraction) SAED techniques were used to gain insight into how the ZnO morphology is dependent on the USP process. It was revealed that, by certain parameter selection, different ZnO morphology could be achieved, from spherical to sphere-like structures assembled by interwoven nanoplate and nanoplate ZnO particles. Further, a more detailed crystallographic investigation was performed by XRD and Williamson-Hall (W-H) analysis on the ZnO with unique and non-typical planar morphology that was not reported before by USP synthesis. Moreover, for the first time, a flexible USP formation model was proposed, ending up in various ZnO morphologies rather than only ideal spheres, which is highly promising to target a wide application area.

show abstract

“…It involves materials deposition by carrying the so-produced liquid droplets into a heated zone where the droplets undergo (1) evaporation, (2) D is dependent on both frequency of the sound and the concentration of the precursor [348] as shown in the previous sections and as illustrated in Fig. 11 with data taken from Gurmen's group [348,353,391] …”

Section: Theory Of Pyrolysis For Predicting Final Particle Sizementioning

confidence: 99%

Progress in Ultrasonic Spray Pyrolysis for Condensed Matter Sciences Developed From Ultrasonic Nebulization Theories Since Michael Faraday

Mwakikunga

2013

Critical Reviews in Solid State and Materials Sciences

View full text Add to dashboard Cite

show abstract

Synthesis of nano-crystalline spherical cobalt–iron (Co–Fe) alloy particles by ultrasonic spray pyrolysis and hydrogen reduction

Cited by 39 publications

References 16 publications

Single-Step Production of Nanostructured Copper-Nickel (CuNi) and Copper-Nickel-Indium (CuNiIn) Alloy Particles

Single-Step Production of Nanostructured Copper-Nickel (CuNi) and Copper-Nickel-Indium (CuNiIn) Alloy Particles

Tuning the Morphology of ZnO Nanostructures with the Ultrasonic Spray Pyrolysis Process

Progress in Ultrasonic Spray Pyrolysis for Condensed Matter Sciences Developed From Ultrasonic Nebulization Theories Since Michael Faraday

Contact Info

Product

Resources

About