Low temperature sintering and magnetic properties of garnet microwave magnetic materials

2007 ◽  
Vol 105 (2-3) ◽  
pp. 408-413 ◽  
Author(s):  
Chien-Yie Tsay ◽  
Chung-Kwei Lin ◽  
Hua-Chi Cheng ◽  
Kuo-Shung Liu ◽  
I.-Nan Lin
Keyword(s):  
Magnetic Properties ◽  
Low Temperature ◽  
Magnetic Materials ◽  
Low Temperature Sintering

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). 

scholarly journals Study on magnetic properties of low temperature sintering M-Barium hexaferrites

2010 ◽  
Vol 107 (9) ◽  
pp. 09A507 ◽  
Author(s):  
Yingli Liu ◽  
Yuanxun Li ◽  
Huaiwu Zhang ◽  
DaMing Chen ◽  
Qiye Wen
Keyword(s):  
Magnetic Properties ◽  
Low Temperature ◽  
Low Temperature Sintering ◽  
Barium Hexaferrites

Development of Ferrite Magnetic Materials with High Strength by a Low-Temperature Sintering Method

2006 ◽  
Vol 317-318 ◽  
pp. 893-898
Author(s):  
Dong Ying Ju ◽  
Pei Bian
Keyword(s):  
Low Temperature ◽  
Boric Acid ◽  
Magnetic Materials ◽  
High Strength ◽  
Iron Chloride ◽  
Process Conditions ◽  
Low Temperature Sintering ◽  
Co2 Gas ◽  
Ferrous Oxalate ◽  
Sintering Method

Magnetite (Fe3O4) ferrite magnetic materials have attracted attention arising by the chip coil electronic material. However, its industrial applications have been limited by the need for high temperature sintering under reduced pressure or vacuum. In order to develop the process method of low-cost and energy saving with high-strength and high magnetism of the magnet, in this paper, a new low-temperature sintering method using CO2 gas and adding a small amount of boric acid (H3BO3) is proposed. Here, the super fine magnetite powder was fabricated by decomposition from ferrous oxalate at 500 in CO2 gas. The ferrous oxalate was synthesized using iron chloride and ammonium oxalate through liquid phase precipitation. The magnetite powder compact was produced by Newton press and CIP (cold isostatic press) after adding a small amount of boric acid. In this study, the effects of the additive on the mechanical and magnetic properties of the sintered magnet were also evaluated. By characteristic evaluation of the magnet, the validity of the proposed new low-temperature sintering process and the optimal process conditions were confirmed.

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