Synthesis of the Sr3Zn2Fe24O41 Z-Type Ferrite by Polymerizable Complex Method

2013 ◽  
Vol 566 ◽  
pp. 231-234 ◽  
Author(s):  
Takuya Tainaka ◽  
Takeyuki Kikuchi ◽  
Tatsuya Nakamura ◽  
Tohru Yamasaki ◽  
Makoto Nakanishi ◽  
...  
Keyword(s):  
Saturation Magnetization ◽  
Single Phase ◽  
Lattice Parameters ◽  
Complex Method ◽  
Vibrating Sample Magnetometer ◽  
Formula Unit ◽  
X Ray Diffraction ◽  
X Ray ◽  
Characteristic Two

Synthesis of Sr3Zn2Fe24O41 Z-type ferrite was investigated. Precursors of ferrite were prepared by polymerizable complex method. Identification of formed phases in the obtained samples and determination of lattice parameters of Z-type ferrite were performed by powder X-ray diffraction (XRD). Single-phase of Sr3Zn2Fe24O41 Z-type ferrite was synthesized by heating at 1463 K for 5hours in air. M-H curve of prepared single-phase Sr3Zn2Fe24O41 Z-type ferrite was measured by using vibrating sample magnetometer (VSM). It was revealed that Sr3Zn2Fe24O41 Z-type ferrite has larger saturation magnetization (23.5 μB/formula unit) than that of Sr3Co2Fe24O41 (22.7 μB/formula unit) and shows characteristic two-step saturation of magnetization as well as Sr3Co2Fe24O41 Z-type ferrite.

Study on optical and magnetic properties of FexNi1-xMn2O4 materials

2021 ◽  
Vol 66 (1) ◽  
pp. 57-64
Author(s):  
Hang Pham Vu Bich ◽  
Yen Nguyen Hai ◽  
Mai Phung Thi Thanh ◽  
Dung Dang Duc ◽  
Hung Nguyen Manh ◽  
...  
Keyword(s):  
Single Phase ◽  
Sol Gel ◽  
Vibrating Sample Magnetometer ◽  
Raman Scattering Spectrum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scattering Spectrum ◽  
Diffraction Diagram ◽  
Optical And Magnetic Properties ◽  
Scanning Electron

In this study, we present the process of synthesis FexNi1-xMn2O4 (x = 0; 0.1; 0.3; 0.5; 0.7; 0.9; 1) by method sol-gel. Scanning electron microscope results shows that the particle size is about 50 nm. The X-ray diffraction diagram shows that the samples are single phase, changing structure clearly as the x ratio increases from 0 to 1. The lattice constant, the bond length also changes with x-value as shown on the Raman scattering spectrum. The results of the vibrating sample magnetometer show that the magnetism of the material FexNi1-xMn2O4 changes with the value of x and reaches a maximum in the range x from 0.5 to 0.7.

scholarly journals Magnetically Oriented Powder Crystal to Indexing and Structure Determination

2014 ◽  
Vol 70 (a1) ◽  
pp. C1560-C1560
Author(s):  
Fumiko Kimura ◽  
Wataru Oshima ◽  
Hiroko Matsumoto ◽  
Hidehiro Uekusa ◽  
Kazuaki Aburaya ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Crystal Lattice ◽  
Powder Diffraction ◽  
Diffraction Method ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
X Ray ◽  
Crystal Lattice Parameters

In pharmaceutical sciences, the crystal structure is of primary importance because it influences drug efficacy. Due to difficulties of growing a large single crystal suitable for the single crystal X-ray diffraction analysis, powder diffraction method is widely used. In powder method, two-dimensional diffraction information is projected onto one dimension, which impairs the accuracy of the resulting crystal structure. To overcome this problem, we recently proposed a novel method of fabricating a magnetically oriented microcrystal array (MOMA), a composite in which microcrystals are aligned three-dimensionally in a polymer matrix. The X-ray diffraction of the MOMA is equivalent to that of the corresponding large single crystal, enabling the determination of the crystal lattice parameters and crystal structure of the embedded microcrytals.[1-3] Because we make use of the diamagnetic anisotropy of crystal, those crystals that exhibit small magnetic anisotropy do not take sufficient three-dimensional alignment. However, even for these crystals that only align uniaxially, the determination of the crystal lattice parameters can be easily made compared with the determination by powder diffraction pattern. Once these parameters are determined, crystal structure can be determined by X-ray powder diffraction method. In this paper, we demonstrate possibility of the MOMA method to assist the structure analysis through X-ray powder and single crystal diffraction methods. We applied the MOMA method to various microcrystalline powders including L-alanine, 1,3,5-triphenyl benzene, and cellobiose. The obtained MOMAs exhibited well-resolved diffraction spots, and we succeeded in determination of the crystal lattice parameters and crystal structure analysis.

Synthesis of Ti3Si0.4Al0.8C1.8 Solid Solution

2008 ◽  
Vol 368-372 ◽  
pp. 995-997
Author(s):  
Cui Wei Li ◽  
Hong Xiang Zhai ◽  
Yang Zhou ◽  
Shi Bo Li ◽  
Zhi Li Zhang
Keyword(s):  
Electron Microscopy ◽  
Solid Solution ◽  
Scanning Electron Microscopy ◽  
Single Phase ◽  
Lattice Parameters ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Powder Mixtures ◽  
X Ray ◽  
Scanning Electron

In this study, free Ti/Si/Al/C powder mixtures with molar ratio of 3:0.4:0.8:1.8 were heated in Argon with various schedules, in order to reveal the possibility for the synthesis of Ti3Si0.4Al0.8C1.8 solid solution powder. X-ray diffraction (XRD) was used for the evaluation of phase identities of the powder after different treatments. Scanning electron microscopy (SEM) was used to observe the morphology of the Ti3Si0.4Al0.8C1.8 solid solution. XRD results showed that predominantly single phase samples of Ti3Si0.4Al0.8C1.8 was prepared after heating at 1400oC for 5 min in Argon and the lattice parameters of Ti3Si0.4Al0.8C1.8 lay between those of Ti3SiC2 and Ti3AlC2.

Structure and Magnetostriction of PrxTb1-xFe1.9Ti0.1 Alloys

2013 ◽  
Vol 281 ◽  
pp. 413-416
Author(s):  
He Yan Liu ◽  
Guo Dong Liu ◽  
Ying Li ◽  
Hong Zhi Luo ◽  
Shao Ling Zhang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Crystal Structure ◽  
Single Phase ◽  
Annealing Treatment ◽  
Annealed Sample ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
Standard Strain ◽  
X Ray ◽  
Type Crystal

The structure and magnetostriction have been investigated for PrxTb1-xFe1.9Ti0.1 alloys by means of the X-ray diffraction phase analysis, vibrating sample magnetometer, and standard strain gauge technique. Comparing the structure of bulk and annealed samples, it can be found that the annealing treatment is of benefit to the formation of single phase with MgCu2-type crystal structure when x0.3. The magnetization at the maximal magnetic field decreases rapidly with increasing Pr content. The magnetostriction for Pr0.2Tb0.8Fe1.9Ti0.1 annealed sample at 900kA/m is 1733ppm. The magnetostriction for PrxTb1-xFe1.9Ti0.1 alloys at 900kA/m also decreases with increasing Pr content.

Preparation and Surface Modification of Magnetic Fe3O4 Nanoparticles

2020 ◽  
Vol 12 (2) ◽  
pp. 131-136
Author(s):  
Sha-Sha Li ◽  
Zao Tian ◽  
De-Zhan Tian ◽  
Lei Fang ◽  
Yu-Wei Huang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Saturation Magnetization ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Magnetic Fe3o4 Nanoparticles ◽  
Magnetic Fe3o4 ◽  
Scanning Electron

In this work, the coprecipitation method was used to prepare the magnetic Fe3O4 nanoparticles which were characterized by X-ray diffraction (XRD), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The particle size and saturation magnetization of Fe3O4 nanoparticles were significant effected by temperature and the precipitant's precipitation time. Under the reaction temperature of 40 °C and the dropping time of 10 h, the size and the saturation magnetization of magnetic Fe3O4 nanoparticles were 9.4 nm and 37.5 emu/g, severally. Besides, the magnetic Fe3O4 nanoparticles were also resoundingly modified with silica (SiO2), chitosan (CS) and sodium alginate (SA). And the hydrodynamic diameters of the Fe3O4/CS micro-composites and Fe3O4/SA micro-composites in aqueous solution were 1.16 μm and 2.11 μm, respectively.

scholarly journals Characterization, Production and Microwave Absorbing Properties of Polyaniline-NiFe2O4: Tb Composites

2019 ◽  
Vol 25 (3) ◽  
pp. 322-327
Author(s):  
Ethem İlhan ŞAHIN ◽  
Selcuk PAKER ◽  
Mesut KARTAL
Keyword(s):  
Structural Analysis ◽  
Nickel Ferrite ◽  
Single Phase ◽  
Second Phase ◽  
Network Analyzer ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microwave Absorbing Properties ◽  
Microwave Absorbing

In this study, terbium-doped NiFe2O4 was produced by using mixed oxide technique. The Ni1-xTbxFe2O4 composition was synthesized and x was selected as 0.025, 0.050 and 0.070, respectively. The single phase Ni ferrite was produced after sintering at 1250 °C for 4 h. X-ray diffraction (XRD), scanning Electron Microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were performed for the structural analysis. The results of the structural analysis indicated that second phase did not form in Ni1-xTbxFe2O4. Additionally, the polyaniline-terbium doped NiFe2O4 composites were produced by hot pressing using the compositions of Ni0.975Tb0.025Fe2O4.018, Ni0.950Tb0.050Fe2O4.037, Ni0.93Tb0.070Fe2O4.0525 and aniline. The weight ratios of terbium-doped nickel ferrite and aniline were 1:1 and 1:3 respectively and epoxy resin was used to produce microwave absorbing composites. The magnetic properties of fabricated composites were investigated using a vibrating sample magnetometer (VSM). The microwave absorbing performances of Polyaniline-NiFe2O4: Terbium composites were investigated by reflectivity in 0 – 8 GHz using two–port vector network analyzer. A minimum of – 39.41 dB reflection performance was obtained in 7.9 GHz at the thickness of 2.0 mm. This reflection performance can be modulated simply by controlling the content of polyaniline in the samples for the required frequency bands. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.20810

scholarly journals A Simple Method for the Determination of Lattice Parameters from Powder X-ray Diffraction Data

1989 ◽  
Vol 30 (7) ◽  
pp. 474-479 ◽  
Author(s):  
D. S. Tsai ◽  
T. S. Chin ◽  
S. E. Hsu ◽  
M. P. Hung
Keyword(s):  
Diffraction Data ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Simple Method ◽  
X Ray

scholarly journals Magnetic Properties of Co0.5Zn0.5Fe2O4Nanoparticles Synthesized by a Template-Assisted Hydrothermal Method

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
H. Y. He
Keyword(s):  
Electron Microscopy ◽  
Saturation Magnetization ◽  
Hydrothermal Method ◽  
Cobalt Ferrite ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Templating Agent ◽  
Nickel Cobalt ◽  
Scanning Electron

In the present paper, nickel cobalt ferrite (Co0.5Zn0.5Fe2O4) nanoparticles were synthesized using a template-assisted hydrothermal method. Carboxymethyl cellulose was used as the templating agent for controlling the morphology of the Co0.5Zn0.5Fe2O4nanoparticles. The synthesized nanoparticles were characterized using X-ray diffraction, scanning electron microscopy, and a vibrating sample magnetometer. The results indicated that the morphology of the nanoparticles changed from granular and superparamagnetic to platelike and ferromagnetic with the addition of the template. The Co0.5Zn0.5Fe2O4nanoparticles synthesized without the template exhibited a saturation magnetization and coercivity 2.81 T and 0.2 kA⋅m−1, while when the template was used, the saturation magnetization and coercivity increased to 3.13 T and 76.6 kA⋅m−1as the template proportion increased to 0.3.

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