Effects of magnetic pre-alignment of nano-powders on formation of high textured barium hexa-ferrite quasi-single crystals via a magnetic forming and liquid participation sintering route

Liu, Junliang; Zeng, Yanwei; Zhang, Xingkai; Zhang, Ming

doi:10.1016/j.jmmm.2015.01.078

Cited by 15 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the doping ions La 3+ and Ce 4+ played a role in restraining the growth rate of the particles in the sample because they were thought to be related to the high melting temperature of the two doping ions [18], [19]. On the other hand, according to the results of XRD measurements on the Bragg diffraction peaks, slightly doped samples experienced a broadening of the peaks, indicating that the size of the crystallites was getting smaller so that it had an impact on the formation of the particle size [5], [20]. Unit cell volume data for pure samples is 695.231 Å 3 , for samples β = 0.02 and γ = 0.05 the unit cell volume is 694.686 Å 3 , and for samples β = 0.04 and γ = 0.05 the cell volume is 694.241 Å 3 .…”

Section: Resultsmentioning

confidence: 99%

The Effect of Barium Substitution With Combinations of Rare Earth on Permanent Magnetic Surface Morphology Based on Barium Hexaferrite

Adnyana,

Suarbawa,

Nurmalasari

et al. 2024

IPR

View full text Add to dashboard Cite

The development of hard magnets today is progressing very rapidly. Developing hard magnets based on rare earth metals becomes a severe problem when the raw materials are not readily available. The chosen solution is to replace oxide-based permanent magnets with small amounts of rare earth metals substituted to improve their magnetic properties. This study synthesized a permanent magnet oxide based on barium hexaferrite doped with lanthanum and cerium atoms. In the synthesis of this material, a mechanical wet milling technique is used to obtain a single-phase permanent magnetic Ba1-β-γLaβCeγFe12O19 system with composition (β = 0 - 0.5 and γ = 0 - 0.1). The precursors are weighted according to their stoichiometric composition. Each mixed composition was milled by high energy milling (PW 1000 in the mixer/mill) at a milling speed of 1000 rpm using steel balls with an average diameter of 12 mm. Grinding conditions included a ball-to-powder weight ratio of 2:1, milling time 5 hours, then compacted with 7000 Psi pressure and sintered at 1200oC for 2 hours. The surface morphology and microstructure of the resulting sample particles were observed using scanning electron microscopy (SEM) with the SEM JEOL JED 305 brand. The characterization results show that the particles are hexagonally homogeneous in shape with particle sizes in the range of 1000-2000 nm for β = 0 and γ = 0 (without doping). In general, the four samples with varying concentrations of doping ions La3+ and Ce4+ showed homogeneous hexagonal structures but smaller particle sizes than pure barium hexaferrite. The sample particle sizes ranged from 500-1000 nm for β = 0.02 and 300-1000 nm for β = 0.04.

show abstract

Section: Resultsmentioning

confidence: 99%

The Effect of Barium Substitution With Combinations of Rare Earth on Permanent Magnetic Surface Morphology Based on Barium Hexaferrite

Adnyana,

Suarbawa,

Nurmalasari

et al. 2024

IPR

View full text Add to dashboard Cite

show abstract

“…Among other magnetic properties, some attempts have also been made to improve the maximum energy product, (BH)max for Sr hexaferrites and Ba-hexaferrites using La-Sm [90][91]. Researchers have different manufacturing methods to produce hexaferrites such as traditional ceramic methods [92][93][94][95][96] or several chemical methods [97][98][99][100][101][102][103]. To the best of our knowledge, there are no recent studies which have reported the simultaneous effect of the sintering temperature and La 3+ -Y 3+ dopants on the properties of barium hexaferrites.…”

Section: Synthesis Methodsmentioning

confidence: 99%

Effect of Substitution on the Dielectric and Magnetic Properties of BaFe12O19

Kumar

2023

Materials Research Foundations

View full text Add to dashboard Cite

Hexaferrites are composed of irons and many other divalent metal ions in various atomic ratios. They are classified as M, W, X, Y, Z, and U type according to the crystalline structure. They are also used as ferromagnetic compounds. These materials have been utilized as the permanent magnets, magnetic recording media and microwave absorbers due to their superior properties. These materials also have wide application in ferrofluids, sensors, loudspeakers, electric power generation, rotors in small direct current (DC) motors, automotive electronics, ferrite cores, fabrication of inductors, micro electro mechanical systems (MEMS), capacitors, transistors, microwave, and in magneto static and electromagnetic devices. BaFe12O19 has gain focus in recent years due to its large coercivity, high magneto crystalline anisotropy, relatively large saturation magnetization, electrical resistivity, low cost, and ability to resist corrosion. The Present chapter will focus on the effect of substitution on the dielectric and magnetic properties BaFe12O19. Morphology and properties of barium hexaferrites, effect of Co-Ti substitution on magnetic properties of nanocrystalline BaFe12O19 and effect of rare-earth materials substitution on the micro structural and magnetic properties of BaFe12O19 are covered.

show abstract

Structural, dielectric and electric modulus analysis of praseodymium-substituted SrPrxFe12-X O19 nanoparticles synthesized via micro-emulsion

et al. 2023

View full text Add to dashboard Cite

Effects of magnetic pre-alignment of nano-powders on formation of high textured barium hexa-ferrite quasi-single crystals via a magnetic forming and liquid participation sintering route

Cited by 15 publications

References 13 publications

The Effect of Barium Substitution With Combinations of Rare Earth on Permanent Magnetic Surface Morphology Based on Barium Hexaferrite

The Effect of Barium Substitution With Combinations of Rare Earth on Permanent Magnetic Surface Morphology Based on Barium Hexaferrite

Effect of Substitution on the Dielectric and Magnetic Properties of BaFe12O19

Structural, dielectric and electric modulus analysis of praseodymium-substituted SrPrxFe12-X O19 nanoparticles synthesized via micro-emulsion

Contact Info

Product

Resources

About