The Synthesis and Characterizations of Aluminums Doped Barium Ferrite (BaAlFe11O19)

Wattanasak Srisiri; Arkom Kaewrawang

doi:10.4028/www.scientific.net/KEM.777.50

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The Synthesis and Characterizations of Aluminums Doped Barium Ferrite (BaAlFe₁₁O₁₉)

Abstract:

Aluminums doped barium ferrite (BaAlFe₁₁O₁₉) was synthesized by sol gel process at annealing temperatures, T_a, of 700 - 1000 °C and annealing time, t_a, of 2 hr. The trend of saturation magnetization, σ_s, and the product of the magnetization and external magnetic fields, σH_max, increases from T_a= 700 - 900 °C, then decreases. The maximum value of σH_max and coercivity, H_c, are 13194.74 Oeemu/g and 20.33 emu/g, respectively, at T_a= 900 °C. The H_c increases from T_a= 700 - 1000 °C and its maximum value is 4448.80 Oe at 1000 °C. The trend of the crystallize size, <D>, increases from T_a= 700 - 900 °C then they are constant until T_a = 1000 °C. The maximum of <D> is 679.18 Å at 950 °C.