Synthesis and characterization of manganese ferrite from low grade manganese ore through solid state reaction route

Manganese ferrite spinel has been synthesized by using low grade manganese ore and ferric oxide as sources of manganese oxide and iron oxide through solid state reaction route by taking manganese and iron mole ratio of 1:2 respectively. The impact of sintering temperature on phase composition and particle size is investigated. Similarly, the impact of frequency on dielectric constant, dielectric loss, AC (alternating current) conductivity and tangent losses is also investigated. The results shows the presence of spinel structure manganese ferrite (MnFe2O4) as the major phase for the sample sintered at 1200 degrees C. It has been established that the crystallite size increase with rise in sintering temperature. The surface morphology of the sample sintered at 1200 degrees C show pyramidal and triangular shape grains. The dielectric constant (epsilon MODIFIER LETTER PRIME) and dielectric losses (epsilon MODIFIER LETTER PRIMEMODIFIER LETTER PRIME) were observed to decrease with increasing the sintering temperature and frequency. Furthermore, the AC (alternating current) conductivity was found to rise with rise in applied frequency. On the other hand, the tangent losses falls considerably with rise in applied frequency.

Automated summary

The manganese ferrite spinel was successfully synthesized through solid state reaction, and it was found that the sintering temperature significantly affected the phase composition and particle size. In addition, the dielectric properties of the material were influenced by frequency, with dielectric constant and losses decreasing with increasing frequency and sintering temperature. Furthermore, the AC conductivity increased with frequency, while tangent losses decreased considerably.