Effect of High Magnetic Field on Ferrite Materials Obtained by Calcination of Layered Double Hydroxide

Abstract

In this paper, the effect of high magnetic field on the development of property were investigated by calcination of MgFe-LDH (CO 3 ) as a precursor of ferrite material under applied field of 10 T. Obtained products were identified by X-ray diffraction analysis (XRD) and their microstructures were observed using scanning electron microscopy (SEM). Furthermore, their magnetic properties were evaluated by a superconducting quantum interference device (SQUID). It was observed that the particle size of mixed oxide prepared by calcination under 10 T was homogeneous and small. Saturation magnetization of mixed oxide synthesized under 10 T was higher than that of zero field. Therefore, it was found that calcination due to imposition of high magnetic field affected phase transition to mixed oxide and provided enhancement of its property.

Zingiber officinale Extract (ZOE) Incorporated with Layered Double Hydroxide Hybrid through Reconstruction to Preserve Antioxidant Activity of ZOE against Ultrasound and Microwave Irradiation

“…ZOE–LDH showed two-step weight loss from 25 to 154.2 °C and 154.2 to 647.5 °C with corresponding weight loss of 10.0% and 15.40%, as shown in Figure 5(Ab). The first step was attributed to the dehydration of surface or interlayer absorbed water [44], while the second step could be due to thermal decomposition of the encapsulated ZOE moiety and dehydroxylation of the LDH lattice together [45]. Similar to thermal decomposition of ZOE, the ZOE–LDH hybrid showed three steps of decomposition at 226.3, 338.7, and 436.3 °C, as shown in Figure 5(Bb).…”

Effect of high magnetic field annealing on the microstructure and magnetic properties of Co–Fe layered double hydroxide

“…However, little attention has been paid to the effect of magnetic field annealing on iron-containing LDHs [12,13]. In this study, we investigated the effects of the high magnetic field on products obtained by calcination of Co-Fe LDH precursor under the applied field (10 T) at different temperatures.…”

Layered double hydroxide/NaSb(OH)6–poly(vinyl chloride) nanocomposites: Preparation, characterization, and thermal stability

“…The general formula of LDHs is [MM(OH) 2 ](A n− ) x/n ·mH 2 O, where M II and M III represent the divalent and trivalent metal cation in the structural layer, and A n − stands for the changeable interlayer anions 5. Because of their layered structure, high changeability of layer cations and interlayer anions, high changeability of crystal size and distributions, LDHs have been used in various fields, such as adsorbents,6 electrochemical materials,7 magnetic materials,8, 9 optical materials,10 catalysts,11 flame retardants,12–14 and drug‐releasing materials 15. In particular, because LDHs can absorb the HCl that released from the dehydrochlorination of PVC and, thus, hinder the autocatalytic dehydrochlorination reactions, LDHs are found to be efficient additives to enhance the thermal stability of PVC.…”