Effect of the stoichiometric ratio on phase evolution and magnetic properties of SrFe12O19 produced with mechanochemical process using mill scale

Structural, thermodynamic, and magnetic properties of SrFe12O19 hexaferrite modified by co-substitution of Cu and Gd

“…It was previously reported that an excess amount of α-Fe 2 O 3 , which remained unreacted, could lead to the weakening of the magnetic properties. 64 However, in our case, the amount of α-Fe 2 O 3 decreased due to the substitution of Gd 3+ and Cu 2+ in the SFO sample and ( BH ) max increased from 0.24 MGOe to 1.33 MGOe, and M s increased from 27.6 to 65.2 emu g −1 .…”

Different Stages of Phase Transformation in the Synthesis of Nanocrystalline Sr-Hexaferrite Powder Prepared by a Gaseous Heat Treatment and Re-Calcination Method

“…Hard ferrites are the least expensive and most commonly used permanent magnet materials and strontium hexaferrite (SrFe 12 O 19 or SrO·6Fe 2 O 3 ), as an M-type hard ferrite, is a ferrimagnetic ceramic compound which has become common material for permanent magnet applications, such as in automotive and microwave devices, and magneto-optical and perpendicular recording media [ 1 , 2 , 3 , 4 ]. Due to the unique biological, thermal, and physical properties of these magnets, their use is increasing day by day [ 5 ]. Furthermore, discovering the details of Sr-Fe-O phase diagrams and modifying the thermochemical properties of its components, is another reason there is interest in this type of ferrite [ 6 ].…”

High‐efficiency mechanochemical synthesis of Strontium carbonate nanopowder from Celestite

“…[2][3][4] It has wide applications such as electronics and glass industries, as a constituent of magnetic ferrites, paints, medicine, dryers and in the manufacturing of metallic strontium and other strontium compounds. [5][6][7][8] SrCO 3 is currently produced from Celestite concentrates using the black ash and the double decomposition (direct conversion) processes. [9][10][11] In black ash process, SrSO 4 is reduced with coke at temperatures generally over 950°C to produce water-soluble SrS.…”

“…Strontium carbonate (SrCO 3 ) is widely used as a starting material for preparing a variety of Strontium compounds 2‐4 . It has wide applications such as electronics and glass industries, as a constituent of magnetic ferrites, paints, medicine, dryers and in the manufacturing of metallic strontium and other strontium compounds 5‐8 . SrCO 3 is currently produced from Celestite concentrates using the black ash and the double decomposition (direct conversion) processes 9‐11 …”