Effects of pH and calcination temperatures on the formation of citrate-derived hexagonal barium ferrite particles

The effect of post annealing treatment on the citrate sol–gel derived nanocrystalline BaFe12O19 powder: structural, morphological, optical and magnetic properties

“…To obtain the BaFe 12 O 19 materials, different molar ratio of Ba:Fe:citricacid have been adopted (Durmus et al 2011;Xu et al 2006;Mali and Ataie 2004;Chen et al 2012;Ting and Wu 2010;Mali and Ataie 2005). According to the previous reports, the sol-gel processed materials are characterized by X-ray diffraction (Murthy et al 2012;Liu and Xiang 2010;Song et al 2010;Ping et al 2008;Ebrahimi et al 2012), thermal gravimetric analysis (Yu and Huang 2003;Yu and Liu 2006), Fouriertransform infrared, scanning electron microscope (Liu and Xiang 2010;Song et al 2010;Ebrahimi et al 2012), transmission electron microscope (Murthy et al 2012), magnetometer (Durmus et al 2011;Mali and Ataie 2005;Birsoza et al 2010;Xu et al 2006;Sozeri et al 2012;Mali and Ataie 2004;Qiu and Gu 2006) for quality, phase formation, thermal decomposition, surface morphology, and magnetic property of the synthesized BaFe 12 O 19 materials. From our recent near infrared (NIR) reflectivity study , the BaFe 12 O 19 material obtained by mechano-thermal process has been identified as NIR reflective color pigment due to its high NIR reflectivity in the region of wavelength 1750-2000 nm.…”

Synthesis, dielectric and magnetic characteristics of poly(1-vinyl-1,2,4-triazole) (PVTri)–barium hexaferrite composite

“…In order to obtain highly homogeneous single-domain hexagonal ferrites, several techniques have been developed, such as citrate-precursor [11], chemical co-precipitation [12], glasscrystallization [13], micro-emulsion [14], self-propagation [15] and hydrothermal [16] methods.…”

Characterization and magnetic properties of BaxSr1−xFe12O19 (x=0–1) ferrite hollow fibers via gel-precursor transformation process

“…For a magnetically optimized hexagonal ferrite a grain size of single-domain is required, with 80% of the theoretical maximum coercivity reported for grains of 0.1 m [1]. In order to obtain highly homogeneous single-domain hexagonal ferrites, several techniques have been developed, such as citrateprecursor [7,8], chemical co-precipitation [9], glass-crystallization [10], micro-emulsion [11,12], self-propagate [13] and hydrothermal [14,15] methods. But, these preparative routes are mainly focused on the hexagonal ferrite powders, a few reports on the fibers.…”