Influence of Sintering Temperature on Magnetic Properties of Ni-Zn-Cu Ferrites Used for Mangetic Shielding in NFC

2016 ◽  
Vol 23 (2) ◽  
pp. 132-135
Author(s):  
Yo-Han Ryu ◽  
◽  
Sung-Soo Kim
Keyword(s):  
Magnetic Properties ◽  
Sintering Temperature

Magnetodielectric Ni ferrite ceramics with Bi2O3 additive for potential antenna miniaturizations

2009 ◽  
Vol 24 (2) ◽  
pp. 324-332 ◽  
Author(s):  
X.T. Liew ◽  
K.C. Chan ◽  
L.B. Kong
Keyword(s):  
Magnetic Properties ◽  
Dielectric Loss ◽  
Grain Growth ◽  
Sintering Temperature ◽  
Magnetic Loss ◽  
Liquid Phase Sintering ◽  
X Ray Diffraction ◽  
Low Dielectric ◽  
High Concentrations

This paper reports on the preparation and characterization of nickel ferrite (NiFe1.98O4) ceramics doped with Bi2O3 as sintering aid. Focus has been on the effects of concentration of Bi2O3 and sintering temperature on the densification, grain growth, dielectric, and magnetic properties of the NiFe1.98O4 ceramics, with an aim at developing magnetodielectric properties, with almost equal real permeability and permittivity, as well as sufficiently low magnetic and dielectric loss tangents, over 3 to 30 MHz (high frequency or HF band). X-ray diffraction results indicated that there is no obvious reaction between NiFe1.98O4 and Bi2O3, at Bi2O3 levels of up to 7 wt% and temperatures up to 1150 °C. The addition of Bi2O3 facilitated a liquid phase sintering mechanism for the densification of NiFe1.98O4 ceramics. The addition of Bi2O3 not only improved the densification but also promoted the grain growth of NiFe1.98O4 ceramics. To achieve sufficiently low dielectric loss tangent, the concentration of Bi2O3 should not be less than 5 wt%. The low dielectric loss tangents of the samples doped with high concentrations of Bi2O3 can be attributed to the full densification of the ceramics. Magnetic properties of the NiFe1.98O4 ceramics, as a function of sintering temperature and Bi2O3 concentration, can be qualitatively explained by the Globus model. Promising magnetodielectric properties have been obtained in the sample doped with 5% Bi2O3 and sintered at 1050 °C for 2 h. The sample has almost equal values of permeability and permittivity of ∼12, together with low dielectric and magnetic loss tangents, over 3 to 30 MHz. This material might be useful for the miniaturization of HF (3 to 30 MHz) antennas.

Nano-TiO2 substituted LiZnBi ferrite ceramics with low sintering temperature and enhanced magnetic properties for LTCC applications

2019 ◽  
Vol 775 ◽  
pp. 1244-1250 ◽  
Author(s):  
Yan Yang ◽  
Xiqing Xu ◽  
Jianxiong Zhao ◽  
Bin Wang ◽  
Cui Li ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Sintering Temperature ◽  
Nano Tio2 ◽  
Low Sintering Temperature

scholarly journals Ferroelectromagnetic Properties of PbFe1/2Nb1/2O3 (PFN) Material Synthesized by Chemical-Wet Technology

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2504 ◽  
Author(s):  
Dariusz Bochenek ◽  
Przemysław Niemiec
Keyword(s):  
Magnetic Properties ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Sintering Temperature ◽  
Closed Porosity ◽  
X Ray ◽  
Synthesis Conditions ◽  
Ceramic Samples ◽  
Sem Microstructure ◽  
Scanning Electron

In this work, PbFe1/2Nb1/2O3 (PFN) ceramic samples synthesized by chemically wet method (precipitation from the solution) were obtained. Due to the tendency to form powder agglomerates, the synthesized powder was subjected to ultrasound. The sintering was carried out under various technological conditions, mainly through controlling the sintering temperature. -X-ray powder-diffraction (XRD), scanning electron microscope (SEM) microstructure analysis, as well as the examinations of dielectric, ferroelectric, and magnetic properties of the PFN ceramics were carried out. Studies have shown that hard ceramic agglomerates can be partially minimized by ultrasound. Due to this treatment, closed porosity decreases, and the ceramic samples have a higher density. Optimization and improvement of the technological process of the PFN material extends the possibility of its use for the preparation of multiferroic composites or multicomponent solid solutions based on PFN. Such materials with functional properties find applications in microelectronic applications, e.g., in systems integrating ferroelectric and magnetic properties in one device. The optimal synthesis conditions of PFN ceramics were determined to be 1050 °C/2 h.

Effects of Sintering Temperature on Structural, Morphological and Magnetic Properties of Strontium Ferrite Nanoparticles

2018 ◽  
Vol 32 (4) ◽  
pp. 1067-1076 ◽  
Author(s):  
S. E. Mousavi Ghahfarokhi ◽  
E. Mohammadzadeh Shobegar ◽  
M. Zargar Shoushtari
Keyword(s):  
Magnetic Properties ◽  
Sintering Temperature ◽  
Ferrite Nanoparticles ◽  
Strontium Ferrite

scholarly journals In Search of Magnetic Properties of Samarium Cobalt (Sm2Co17) within a Low-Temperature Sintering Process

2021 ◽  
Vol 16 (3) ◽  
pp. 517-524
Author(s):  
Poppy Puspitasari ◽  
A. Muhammad ◽  
A. A. Permanasari ◽  
T. Pasang ◽  
S. M. S. N. S. Zahari ◽  
...  
Keyword(s):  
Magnetic Material ◽  
Magnetic Properties ◽  
Low Temperature ◽  
Functional Groups ◽  
Sintering Temperature ◽  
Alkyl Halides ◽  
High Coercivity ◽  
Low Temperature Sintering ◽  
Magnetic Anisotropy Energy ◽  
Low Sintering Temperature

Samarium cobalt is known as super high density magnetic material with large magnetic anisotropy energy. Samarium–cobalt exhibits manipulative magnetic properties as a rare-earth material which has different properties in a low sintering temperature. It is therefore of paramount importance to investigate samarium cobalt (Sm2Co17) magnetic properties in the low temperature sintering condition. Sm2Co17, which is utilized in this research, is synthesized via the sol–gel process at sintering temperatures of 400, 500, and 600 °C. Subsequently, the crystallites indicate the formation of a single-phase Sm2Co17 on all the samples in all temperature variations. Moreover, the peaks in the X-ray diffraction analysis of crystallite sizes calculated using the Scherrer equation are 17.730, 15.197, and 13.296 nm at 400, 500, and 600 °C. Through scanning electron microscopy, the particles are found to be relatively large and agglomerated, with average sizes of 143.65, 168.78, and 237.26 nm. The functional groups are also analyzed via Fourier-transform infrared spectroscopy, which results in the appearance of several bonds in the samples, for example, alkyl halides, alkanes, and esters with aromatic functional groups on the fingerprint area and alkynes, alkyl halides, and alcohol functional groups at a wavelength of above 1500 cm. The test results of the magnetic properties using vibrating-sample magnetometer (VSM) revealed high coercivity and retentivity in the samples sintered at 400 °C. However, the highest saturation occurs in the samples sintered at 600 ℃. At a low sintering temperature (below 1000 °C), samarium cobalt shows as the soft magnetic material. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

Effect of sintering temperature on structural, magnetic properties of lithium chromium ferrite

2012 ◽  
Vol 523 ◽  
pp. 66-71 ◽  
Author(s):  
R.P. Patil ◽  
P.P. Hankare ◽  
K.M. Garadkar ◽  
R. Sasikala
Keyword(s):  
Magnetic Properties ◽  
Sintering Temperature

Electrical and Magnetic Studies of (La0.5-xPrxBa0.5)(Mn0.5Ti0.5)O3 as Multiferroic Material

2012 ◽  
Vol 545 ◽  
pp. 269-274
Author(s):  
Nor Hayati Alias ◽  
Abdul Halim Shaari ◽  
Wan Mohamad Daud Wan Yusoff ◽  
Che Seman Mahmood
Keyword(s):  
Magnetic Properties ◽  
Dielectric Properties ◽  
Solid State ◽  
Room Temperature ◽  
Sintering Temperature ◽  
Multiferroic Material ◽  
Magnetic Studies ◽  
State Technique ◽  
Magnetic And Dielectric Properties ◽  
Synthesized Materials

A new perovskite based titano-manganite (La0.5-xPrxBa0.5)(Mn0.5Ti0.5)O3 at x concentration 0, 0.01, 0.03, 0.05, 0.07 and 0.09 has been successfully prepared by ceramic solid-state technique at sintering temperature of 1300 °C. Dielectric electrical properties of the synthesized materials at frequency ranging from 5 Hz to 1 MHz and magnetic properties have been studied at room temperature. Analyses have been carried out to determine the structural, magnetic and dielectric properties of the synthesized material as a candidate of multiferroic material.

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