Preparation of hollow spherical particles of ferrite strontium SrFe₁₂O₁₉ by spray-pyrolysis

2021 ◽  
pp. 62-65
Author(s):  
B. B. Khaidarov ◽  
A. G. Yudin ◽  
D. S. Suvorov ◽  
D. V. Kuznetsov ◽  
D. V. Lysov ◽  
...  
Keyword(s):  
Phase Composition ◽  
Spray Pyrolysis ◽  
Spherical Particles ◽  
Spray Pyrolysis Method ◽  
Synthesis Parameters ◽  
Pyrolysis Method ◽  
20 Nm

The article presents the synthesis of hollow nanostructured microspheres of ferrite strontium by spray-pyrolysis. The phase composition, morphology, dispersion of the microspheres obtained and the effect of synthesis parameters to the morphology and the dispersion of the material obtained are investigated. It has been established that in the process of synthesis by spray-pyrolysis method, hollow nanostructured microspheres are formed with dimensions in the range of 0,5‒10,0 μm, the thickness of the microspheres of the microspheres is about 100 nm. Microspheres consist of particles of 10‒20 nm. Ill. 4. Ref. 12. Tab. 1. 

scholarly journals Ultraviolet and violet-blue emission of Zn doped MgO/mg(OH)2 particles prepared by one step spray pyrolysis method

2018 ◽  
Vol 1 (1) ◽  
pp. 57-66
Author(s):  
Fenfen Fenda Florena ◽  
◽  
Dwindra Wilham Maulana ◽  
Ferry Faizal ◽  
Bambang Mukti Wibawa ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Doping Concentration ◽  
Blue Emission ◽  
Spherical Shape ◽  
Spherical Particles ◽  
Spray Pyrolysis Method ◽  
Excitation Spectra ◽  
X Ray ◽  
Pyrolysis Method ◽  
One Step

Spherical particles of Zn doped MgO were prepared by one-step spray pyrolysis method. The crystalline nature and particle size of the samples were characterized by X-ray diffraction analysis (XRD). The morphology of samples was studied by scanning electron microscope (SEM) and the presence of Zn in the sample was confirmed by energy dispersive X-ray analysis (EDX). The optical properties of the samples were investigated using photoluminescence spectroscopy (PL) analysis to obtain excitation and emission spectra of the samples. Results indicated that the doped MgO particles exhibited a cubic structure without hexagonal wurtzite structure as the Zn concentrations were increased. Spherical shape and porous particles are found with increasing of doping concentration. The optical band gap of MgO altered with the addition of doping concentration. A considerable redshift of about ~0.08 – 0.13 eV in the excitation spectra of 2.22 eV emission band was revealed in Zn doped MgO samples. It was highlighted that Zn doped MgO prepared by the spray pyrolysis generated emission at UV-Vis wavelength required for many applications.

Blue Luminescent of ZnO:Zn Nanocrystal Prepared by One Step Spray Pyrolysis Method

2013 ◽  
Vol 737 ◽  
pp. 20-27 ◽  
Author(s):  
Camellia Panatarani ◽  
Dunden Gilang Muharam ◽  
Bambang Mukti Wibawa ◽  
I Made Joni
Keyword(s):  
Spray Pyrolysis ◽  
Zinc Acetate Dihydrate ◽  
Tubular Reactor ◽  
Luminescent Properties ◽  
Spray Pyrolysis Method ◽  
X Ray ◽  
Carrier Gas ◽  
Pyrolysis Method ◽  
One Step ◽  
20 Nm

A blue luminescent of ZnO:Zn nanocrystal has been successfully prepared by one step spray pyrolysis method without reducing gas atmosphere. Zinc acetate dihydrate aqueous solutions (0.05 M) were atomized by ultrasonic atomizer. The atomizer used an air as carrier gas with 1, 3 and 5 L/min flowrate. The tubular reactor was set at 500, 600 and 700oC. As prepared samples were characterized by means of x-ray diffraction spectroscopy and scanning electron microscope-energy dispersive x-ray spectroscopy (SEM-EDS). The crystal size of as prepared particles calculated by Scherrer’s equation give 10-20 nm. The luminescent properties of as prepared particles were measured using spectrofluorophotometer. The highest photoluminescent intensity of particles irradiated with excited wavelength of 250 nm was obtained from samples prepared using 5 L/min carrier gas with temperature of tubular reactor 700oC. High intensity of blue luminescent was obtained due to oxygen vacancy in ZnO:Zn.

scholarly journals Ultraviolet and violet-blue emission of Zn doped MgO/mg(OH)2 particles prepared by one step spray pyrolysis method

2018 ◽  
Vol 1 (1) ◽  
pp. 48-56
Author(s):  
Fenfen Fenda Florena ◽  
◽  
Dwindra Wilham Maulana ◽  
Ferry Faizal ◽  
Bambang Mukti Wibawa ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Doping Concentration ◽  
Blue Emission ◽  
Spherical Shape ◽  
Spherical Particles ◽  
Spray Pyrolysis Method ◽  
Excitation Spectra ◽  
X Ray ◽  
Pyrolysis Method ◽  
One Step

Spherical particles of Zn doped MgO were prepared by one-step spray pyrolysis method. The crystalline nature and particle size of the samples were characterized by X-ray diffraction analysis (XRD). The morphology of samples was studied by scanning electron microscope (SEM) and the presence of Zn in the sample was confirmed by energy dispersive X-ray analysis (EDX). The optical properties of the samples were investigated using photoluminescence spectroscopy (PL) analysis to obtain excitation and emission spectra of the samples. Results indicated that the doped MgO particles exhibited a cubic structure without hexagonal wurtzite structure as the Zn concentrations were increased. Spherical shape and porous particles are found with increasing of doping concentration. The optical band gap of MgO altered with the addition of doping concentration. A considerable redshift of about ~0.08 – 0.13 eV in the excitation spectra of 2.22 eV emission band was revealed in Zn doped MgO samples. It was highlighted that Zn doped MgO prepared by the spray pyrolysis generated emission at UV-Vis wavelength required for many applications.

Electrochemical Performance of SOFC Components Fabricated by Spray Pyrolysis Method

2015 ◽  
Vol 68 (1) ◽  
pp. 2479-2490 ◽  
Author(s):  
G. Tsimekas ◽  
E. Papastergiades ◽  
N. E. Kiratzis
Keyword(s):  
Electrochemical Performance ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Pyrolysis Method

ChemInform Abstract: The Photovoltaic Properties of Novel Narrow Band Gap Cu2SnS3Films Prepared by a Spray Pyrolysis Method.

ChemInform ◽  
2015 ◽  
Vol 46 (28) ◽  
pp. no-no
Author(s):  
Zhen Jia ◽  
Qinmiao Chen ◽  
Jin Chen ◽  
Tingting Wang ◽  
Zhenqing Li ◽  
...  
Keyword(s):  
Band Gap ◽  
Spray Pyrolysis ◽  
Narrow Band ◽  
Spray Pyrolysis Method ◽  
Photovoltaic Properties ◽  
Pyrolysis Method

scholarly journals Characteristics of nano-sized pb-based glass powders by high temperature spray pyrolysis method

2008 ◽  
Vol 116 (1353) ◽  
pp. 600-604 ◽  
Author(s):  
Jung Sang CHO ◽  
Dae Soo JUNG ◽  
Seung Kwon HONG ◽  
Yun Chan KANG
Keyword(s):  
High Temperature ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
Pyrolysis Method ◽  
Glass Powders

scholarly journals Synthesis of Silica Particles Using Ultrasonic Spray Pyrolysis Method

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 463
Author(s):  
Srecko Stopic ◽  
Felix Wenz ◽  
Tatjana-Volkov Husovic ◽  
Bernd Friedrich
Keyword(s):  
Spray Pyrolysis ◽  
Sol Gel ◽  
Ultrasonic Spray Pyrolysis ◽  
Silica Particles ◽  
Cement Industry ◽  
Submicron Particles ◽  
Spherical Particles ◽  
Spray Pyrolysis Method ◽  
X Ray ◽  
Ultrasonic Spray

Silica has sparked strong interest in hydrometallurgy, catalysis, the cement industry, and paper coating. The synthesis of silica particles was performed at 900 °C using the ultrasonic spray pyrolysis (USP) method. Ideally, spherical particles are obtained in one horizontal reactor from an aerosol. The controlled synthesis of submicron particles of silica was reached by changing the concentration of precursor solution. The experimentally obtained particles were compared with theoretically calculated values of silica particles. The characterization was performed using a scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDS). X-ray diffraction, frequently abbreviated as XRD, was used to analyze the structure of obtained materials. The obtained silica by ultrasonic spray pyrolysis had an amorphous structure. In comparison to other methods such as sol–gel, acidic treatment, thermal decomposition, stirred bead milling, and high-pressure carbonation, the advantage of the ultrasonic spray method for preparation of nanosized silica controlled morphology is the simplicity of setting up individual process segments and changing their configuration, one-step continuous synthesis, and the possibility of synthesizing nanoparticles from various precursors.

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