Investigation of the effective parameters on the synthesis of strontium hexaferrite nanoparticles by chemical coprecipitation method

Improvement of the coercivity of strontium hexaferrite induced by substitution of Al3+ ions for Fe3+ ions

“…Therefore it is urgent to find some magnetic materials which can partially replace Nd 2 Fe 17 B and Sm 2 Fe 17 N. Mtype strontium hexaferrite (SrFe 12 O 19 ) is an important permanent magnetic material with better magnetic properties. Since the SrFe 12 O 19 has abundant raw material, low manufacturing cost, stable properties and anti-oxidation, it has attracted extensive interests in the past decades [1][2][3][4][5][6][7], and been widely used in telecommunication, magnetic recording medium, magneto-optics and microwave devices [8][9][10][11][12][13][14][15][16][17][18][19]. However, in comparison with Nd 2 Fe 17 B, the coercivity of the SrFe 12 O 19 is still low, which affects its application seriously.…”

A Current Review on the Synthesis and Magnetic Properties of M-Type Hexaferrites Material

“…This dried powder is, then, sintered at temperature lower than the conventional solid state route and the required M-type ferrite were obtained [29] [30] [31]. Several workers are working on the properties and quality of M-type ferrite powders prepared by co-precipitation method and they are doing such investigation on the basis of experimental conditions [32] [33]. In this method, an appropriate amount of Fe (NO 3 ) 3 .9H 2 O was added to NACLO and NACL solutions which are produced through a concentrated solution of NAOH when chlorine gas was bubbled through a solution of NAOH and at Fe:Ba = 10 ratio, BaCl 2 .2H 2 0 was added to the BaM solution.…”

Self-Forming 3D Core–Shell Ceramic Nanostructures for Halogen-Free Flame Retardant Materials

“…But precipitation reactions are not trivial and a deep study of the reaction parameters is necessary in order to obtain the desired materials with different compositional and morphological characteristics. [23][24][25] As mentioned above, certain properties of materials are favored by decreasing the particle size, but as it is known, the major drawback on the use of nanometric particles is that they tend to undergo agglomeration processes. This agglomeration behaviour produces a decrease of reactivity, and therefore a larger amount of material is required.…”