The effect of Mg–Al binary doped barium hexaferrite for enhanced microwave absorption performance

Exploring the structural and magnetic trends in Ba0.9Sm0.1Fe12−xAlxO19 M-type Hexaferrites

“…Compared to other magnetic materials M type barium hexaferrites are known for their high chemical stability, magneto crystalline anisotropy as well as high magnetic saturation [4,5,7,8,10]. However, researchers have been trying to enhance its properties from the intrinsic magnetic structure so that barium hexaferrites can be efficiently utilized for data storage, magnetic recording, as well as a permanent magnet [11]. The electromagnetic properties of M-type hexaferrites have been tuned using alternative synthesis techniques [12][13][14][15][16][17].…”

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

“…[ 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+ , [...…”

High-performance microwave absorption by optimizing hydrothermal synthesis of BaFe12O19@MnO2 core–shell composites

“…21 As an antiradar material, BHF can be synthesized as nanoparticles via top-down or bottom-up methods. Generally, for the synthesis of BHF-based nanoparticles, in addition to the hydrothermal method, other alternatives exist, including mechanical alloying, [22][23][24] coprecipitation, 10,25,26 sol-gel, 27 and autocombustion. 28 Hydrothermal synthesis offers advantages over other synthesis methods: low cost, nontoxicity, environmentally friendly precursors, and simple procedures.…”