Structural, Magnetic and Microwave Absorption Properties of Hydrothermally Synthesized (Gd, Mn, Co) Substituted Ba-Hexaferrite Nanoparticles

Torabi, Z.; Arab, Ali; Ghanbari, F.

doi:10.1007/s11664-017-5889-7

Cited by 13 publications

(2 citation statements)

References 36 publications

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“…[ 215 ] Efforts have been made to enhance the magnetic characteristics of hexaferrite by cationic substitution to meet a variety of applications. [ 148,216 ] These includes efforts on altering the intrinsic properties of hexaferrites by replacing with either single or multiple trivalent metal ions such as La 3+ , [ 217–221 ] Tb 3+ , [ 222,223 ] Nd 3+ , [ 138–140,224–226 ] Eu 3+ , [ 227 ] Dy 3+ , [ 228,229 ] Sm 3+ , [ 230,231 ] Cr 3+ , [ 232,233 ] Al 3+ , [ 185,186,234,235 ] Gd 3+ , [ 236–238 ] Sc 3+ , [ 239 ] Er 3+ , [ 240–242 ] Pr 3+ , [ 243 ] Yb 3+ , [ 244 ] Ce 3+ , [ 245 ] La 3+ –Pr 3+ , [ 246 ] La 3+ –Nd 3+ , [ 247 ] Nd 3+ –Sm 3+ , [ 248 ] Nb 3+ –Y 3+ , [ 249 ] La 3+ –Ce 3+ , [ 250 ] Er 3+ –Cr 3+ , [ 251 ] Dy 3+ –Nd 3+ –Pr 3+[ 252 ] or a suitable mix of divalent and trivalent ions such as Tb 3+ –Mn 2+ , [ 253 ] Nd 3+ –Co 2+ , [ 254 ] Gd 3+ –Co 2+ , [ 255 ] Pr 3+ –Mn 2+ , [ 256 ] Sm 3+ –Co 2+ , [ 257 ] La 3+ –Co 2+ , [ 258 ] La 3+ –Mn 2+ , [ 259 ] Pr 3+ –Co 2+ , [ 260 ] Cu 2+ –Cr 3+ , [ 261 ] Al 3+ –Mg 2+ , [ 262 ] Ce 3+ –Zn 2+ , [ 263 ] Ce 3+ –Co 2+ , [ 264 ] Gd 3+ –Mn 2+ ‐Co 2+ , [ 265 ] Ca 2+ –La 3+ –Co 2+[ 266 ] or tetravalent Zr 4+[ 267 ] or a divalent and tetravalent ions such as Co 2+ –Si 4+ , [ 268 ] Cu 2+ –Zr 4+,[ 269 ] Zr 4+ –Co 2+ , [...…”

Section: Properties Of Hexagonal Ferritesmentioning

confidence: 99%

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Mohammed

Mohammed²,

Srivastava

2022

Cryst. Res. Technol.

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With the fast growth of wireless communication technology in high‐frequency ranges, electromagnetic (EM) interference has become a growing concern that has drawn international attention. The development of materials that can absorb EM radiation is a crucial solution. This review provides a detailed overview of ferrites, specifically hexagonal ferrites and their composites for microwave (MW) absorption. It examines hexagonal ferrite classifications based on the stacking order of their fundamental blocks and their synthesis methods and strategies for improving their magnetic properties. On the other hand, this review included a detailed examination of hexagonal ferrites–conducting polymer, hexagonal ferrites–2D materials, and hexagonal ferrite–other nanomaterials composites for MW absorption applications. Enhancing MW absorption in hexagonal ferrites‐based microwave absorption materials (MAMs) regulates their EM characteristics, improves impedance matching, and creates a diversity of loss mechanisms. In addition, the limitations, challenges, and opportunities of hexagonal ferrites‐based MAMs are discussed, which will be helpful to those working in related areas. As a general application potential, it is worth mentioning that, as a result of recent promising findings in the synthesis of hexagonal ferrites‐based composites, hexaferrite‐based composites are suitable devices in the area of microwave absorption.

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Section: Properties Of Hexagonal Ferritesmentioning

confidence: 99%

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Mohammed

Mohammed²,

Srivastava

2022

Cryst. Res. Technol.

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“…Barium hexaferrite nanoparticles (BaFe-NP) can be synthesized by different routes: hydrothermal synthesis [ 21 , 22 ], sol gel synthesis [ 23 , 24 ], microemulsion [ 25 ] or coprecipitation [ 26 , 27 , 28 ] are reported. Due to its simplicity, fast reaction times and large batch sizes, coprecipitation with a following calcining step was chosen for this study.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Barium Hexaferrite Nanoparticles with Tunable Coercivity as Potential Magnetic Heating Agents

Zahn,

Diegel,

Valitova

et al. 2024

Nanomaterials

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Using magnetic nanoparticles (MNPs) for extracorporeal heating applications results in higher field strength and, therefore, particles of higher coercivity can be used, compared to intracorporeal applications. In this study, we report the synthesis and characterization of barium hexa-ferrite (BaFe12O19) nanoparticles as potential particles for magnetic heating. Using a precipitation method followed by high-temperature calcination, we first studied the influence of varied synthesis parameters on the particles’ properties. Second, the iron-to-barium ratio (Fe/Ba = r) was varied between 2 and 12. Vibrating sample magnetometry, scanning electron microscopy and X-ray diffraction were used for characterization. A considerable influence of the calcination temperature (Tcal) was found on the resulting magnetic properties, with a decrease in coercivity (HC) from values above 370 kA/m for Tcal = 800–1000 °C to HC = 45–70 kA/m for Tcal = 1200 °C. We attribute this drop in HC mainly to the formation of entirely multi-domain particles at high Tcal. For the varying Fe/Ba ratios, increasing amounts of BaFe2O4 as an additional phase were detected by XRD in the small r (barium surplus) samples, lowering the particles’ magnetization. A decrease in HC was found in the increased r samples. Crystal size ranged from 47 nm to 240 nm and large agglomerates were seen in SEM images. The reported particles, due to their controllable coercivity, can be a candidate for extracorporeal heating applications in the biomedical or biotechnological field.

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