Synthesis of nanocrystalline Ca2Cu2Fe12O22 Y-type hexaferrites by the sol–gel combustion method in metal nitrates system. (4th April 2018)

• Record Type: Journal Article
• Authors: Bankar, S. B.; Meshram, N. S.; Sarkar, N. N.; Ahamad, H. S.; Dhobale, S. J.; Rewatkar, K. G.
• Is Part Of: Ferroelectrics. Volume 526(2018)
• Page Start: 187
• Page End: 192
• Publication Date: 2018-04-04
• Subjects: Hexaferrites -- Ca-M ferrites substitutions -- magnetic properties -- VSM -- TEM -- PXRD -- dielectric loss; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/00150193.2017.1360708
• Languages: English
• ISSNs: 0015-0193

Abstract

ABSTRACT: Nano-size Y-type hexaferrites powders are synthesized by using the sol–gel combustion method in nitrate urea systems. The spectra of FTIR, TGA, and DSC indicate that urea acid and nitrate ions were decomposed at the temperature between 170°C and 200°C. The X-ray diffraction patterns of Ca2 Cu2 Fe12 O22 annealed above 800°C manifest that all the species have hexagonal crystal structure. TEM observation of as-burnt powders of Ca2 Cu2 Fe12 O22 shows the powder particles have an average particle size of 70 nm. Magnetic hysteresis loop measurements of the series Ca2 Cu2 Fe12 O22, exhibit that the saturation magnetization (Ms ), the remanent magnetization (Mr ) and the coercitivity (Hc ) of compounds depend strongly on the chemical composition of materials. The maxium values of Ms (0.54526 emu/g) and Mr (87.099E-3 emu/g) and the areas of magnetic hysteresis loop of compounds decrease with increasing the value of Cu.