scholarly journals Structural, dielectric, semiconducting and optical properties of high-energy ball milled YFeO3 nano-particles

2019 ◽  
Author(s):  
Chandra Bhal Singh ◽  
Dinesh Kumar ◽  
Narendra Kumar Verma ◽  
Akhilesh Kumar Singh
Keyword(s):  
Optical Properties ◽  
High Energy ◽  
Nano Particles ◽  
Energy Ball

Metallic Nano Particles Embedded in Sapphire

2015 ◽  
Vol 1769 ◽  
Author(s):  
A. Crespo-Sosa ◽  
P.E. Mota-Santiago ◽  
J.L. Jiménez-Hernández ◽  
H.G. Silva-Pereyra ◽  
E.V. García-Ramírez ◽  
...  
Keyword(s):  
Optical Properties ◽  
Ion Implantation ◽  
Ion Irradiation ◽  
High Energy ◽  
Nano Particles ◽  
Nano Composites ◽  
Preparation Process ◽  
The Matrix ◽  
Linear Optical Properties ◽  
Optical Applications

ABSTRACTSapphire is best known for its hardness that makes it ideal for many mechanical and optical applications, but its resistance to radiation damage and its optical properties, combined with metallic nano-particles, make it promising for future opto-electronic and plasmonic devices. In this paper, we present an overview of our work on the fabrication of metallic nano-particles embedded in synthetic sapphire by means of ion implantation, thermal annealing and high energy ion irradiation. We show that we can have control over the amount and size of the nano particles formed inside the matrix by carefully choosing the parameters during the preparation process. Furthermore, we show that anisotropic nano particles can be obtained by an adequate high energy ion irradiation of the originally spherical nano particles. We also have studied the linear and non-linear optical properties of these nano-composites and have confirmed that they are large enough for future applications.

Structural and optical properties of europium-doped zinc oxide nanopowders prepared by mechanochemical and combustion reaction methods

2012 ◽  
Vol 36 (1) ◽  
pp. 43-51 ◽  
Author(s):  
T.B. Ivetić ◽  
M.R. Dimitrievska ◽  
I.O. Gúth ◽  
Lj.R. Đačanin ◽  
S.R. Lukić-Petrović
Keyword(s):  
Zinc Oxide ◽  
Optical Properties ◽  
Diffuse Reflectance Spectroscopy ◽  
Synthesis Method ◽  
High Energy ◽  
Combustion Reaction ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Zno Powders ◽  
Energy Ball

Abstract Zinc oxide nanoparticles doped with europium were obtained by high energy ball milling followed by heat treatment and combustion reaction synthesis method starting from its microcrystalline powders. The influence of the preparation method approach and europium doping on the structural and optical properties of ZnO powders was investigated by X-ray diffraction, Raman and diffuse reflectance spectroscopy

One-Step Synthesis of CoFe2O4 Nano-Particles by Mechanical Alloying

2013 ◽  
Vol 829 ◽  
pp. 747-751 ◽  
Author(s):  
Sedigheh Rashidi ◽  
Abolghasem Ataie
Keyword(s):  
Mechanical Alloying ◽  
Single Phase ◽  
Milling Time ◽  
High Energy ◽  
Nano Particles ◽  
Milled Sample ◽  
High Energy Ball Mill ◽  
One Step ◽  
Energy Ball ◽  
The Mean

In this study, cobalt ferrite (CoFe2O4) nanoparticles were synthesized by intensive mechanical alloying of CoCO3 and α-Fe2O3 powder using a planetary high energy ball mill in air without any subsequent heat treatment. Effects of milling time on the phase composition, morphology and magnetic properties of the powders were evaluated using XRD, FESEM and VSM techniques, respectively. XRD results indicated that single phase CoFe2O4 nanoparticles with a mean crystallite size of 15 nm were synthesized after 25 hours of mechanical milling. FESEM images confirmed the formation of uniform nanoparticles and showed that the mean particle size of the milling products was decreased from 51 to 25 nm by increasing the milling time from 20 to 30 hours. VSM measurements of the sample milled for 25 hours revealed a saturation magnetization (Ms) of 52.19 emu/g and coercivity (Hc) of 831.95 Oe, which were higher than those of 20 hours milled sample.

scholarly journals Novel Method of Nanoparticle Synthesis using Surface Grinding

2020 ◽  
Vol 9 (5) ◽  
pp. 1643-1646
Keyword(s):  
Feed Rate ◽  
Glass Plate ◽  
Nanoparticle Synthesis ◽  
High Energy ◽  
Surface Grinding ◽  
Nano Particles ◽  
Grinding Wheel ◽  
Specific Shape ◽  
Energy Ball ◽  
Novel Method

Nanoparticles are of most important in all the areas because of their varied and unusual properties. nano particles could be produced using top down and bottom up approaches. We present a novel method of synthesizing nanoparticles such as C, ZnO, Al, Fe2O3 . The surface grinding was taken as a fundamental process inside the proposed Nano Particle Synthesizer (NPS). Parameters such as speed of the grinding wheel, feed rate and coolant feed rate could be used for fixing the dimension and specification of our nano particles synthesizing unit. After Passing through the NPS, particles of micro and nanoparticles were collected in glass plate and characterized using Scanning Electron Microscope (SEM) to confirm the size and shape of nano particles. This method could be employed as an alternative method to High Energy Ball Milling for producing high pressure and high temperature that favors the synthesis of nano particles in specific shape and size.

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