Influence of pH on characteristics of BaFe12O19 powder prepared by sol–gel auto-combustion

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

“…The M-H curve is depicted in Fig. 10 (Durmus et al 2011;Shang et al 2007;Vinod 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;Parkin et al 2001;Hong et al 2004;Rafique et al 2013;Castro et al 1997;Ounnunkad and Winotai 2006). The ratio M r /M s of the present BaFe 12 O 19 sample is found to be 0.543 which is comparable to the reported values (Shang et al 2007;Birsoza et al 2010).…”

“…Such a wasp-waist-like shape of the hysteresis loop was reported in the literature for the BaFe 12 O 19 phase (Mali and Ataie 2005;Wang et al 2007). Table 3 summarizes the room temperature magnetic properties of the hexagonal BaFe 12 O 19 phase materials obtained by sol-gel combustion methods (Durmus et al 2011;Shang et al 2007;Vinod et al 2011;Ataie 2004, 2005;Birsoza et al 2010;Xu et al 2006;Sozeri et al 2012;Qiu and Gu 2006;Parkin et al 2001;Hong et al 2004;Rafique et al 2013;Castro et al 1997;Ounnunkad and Winotai 2006). From this The main magnetic characteristics should be due to the high purity (1 % of impurities), the good crystalline state, and the small homogeneous size of the particles Castro et al…”

“…(Mali and Ataie 2005). Hitherto there have been several investigations reported for the citrate sol-gel processed BaFe 12 O 19 materials (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). 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).…”

“…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 and characterization of manganese–zinc ferrite obtained by thermal decomposition from organic precursors

“…Whereas the oxidant to fuel (O/F) molar ratio amounted to 5; therefore, the mixture was supplemented with an appropriate quantity of concentrated nitric acid (V). In case citric acid and citric acid (CA) with EDTA mixture were used as the fuel of autocombustion process, the final pH was adopted as 7, because above pH = 6 citric acid occurs mainly in the form of HCit 2-and Cit 3-ions, which favors better complexing of the metal ions [27]. The pH was adjusted by adding 25 vol% ammonia solution.…”