Influence of stoichiometry and heat treatment conditions on the magnetic properties and phase constitution of Ba-ferrite powders prepared by sol–gel

The Effect of Condensation on the Morphology and Magnetic Properties of Modified Barium Hexaferrite (BaFe12O19)

“…It may vary depending on the synthesis route followed. For instance, single phase samples were obtained when it is around 1:11 in the sol-gel technique [19], when ball milling was used optimum ratio is 1:12 [20], 1:10 in the coprecipitation route [11], and it is 1:4 in the hydrothermal method [21]. Pre-heating between 400℃ and 500℃ for several hours was reported as a key factor to prevent formation of α-Fe 2 O 3 phase in the sol-gel technique [22].…”

Effect of La doping on structural, magnetic and microstructural properties of Ba1 − x La x Fe12O19 ceramics prepared by citrate combustion process

“…The magnetic properties can be enhanced by using optimization in the synthetic conditions [7][8][9][10][11], synthetic routes and special impurity element additions. Various chemical processes have usually been adopted to prepare the excellent pure and doped barium hexaferrites such as hydrothermal [7], sol-gel [8,12], co-precipitation [10,13], microwave-induced combustion [14] and citrate-nitrate gel auto-combustion process [15].…”

“…Various chemical processes have usually been adopted to prepare the excellent pure and doped barium hexaferrites such as hydrothermal [7], sol-gel [8,12], co-precipitation [10,13], microwave-induced combustion [14] and citrate-nitrate gel auto-combustion process [15]. These chemical syntheses show high purity of the barium ferrite phase, uniform grain, chemical homogeneity and good magnetic properties.…”

Influence of stoichiometry and calcination condition on the microstructure and phase constitution of NiFe 2 O 4 powders prepared by sol‐gel autocombustion method

“…All the as-burnt powders with the different ratios of Fe/Ni have nickel ferrite with spinel structure. This indicates that the NiFe 2 O 4 ferrite in opposite of BaFe 12 O 19 [11][12][13] can be directly formed after auto-combustion of gel. The results seem to indicate that Fe/Ni = 2 yield the best Endo.…”