Preparation of magnesium ferrite nanoparticles by ultrasonic wave-assisted aqueous solution ball milling

Abstract

Magnesium ferrite, MgFe2O4 nanoparticles with high saturation magnetization were successfully synthesized using ultrasonic wave-assisted ball milling. In this study, the raw materials were 4MgCO3·Mg(OH)2·5H2O and Fe2O3 powders and the grinding media was stainless steel ball. The average particle diameter of the product MgFe2O4 powders was 20 nm and the saturation magnetization of them reached 54.8 emu/g. The different results of aqueous solution ball milling with and without ultrasonic wave revealed that it was the coupling effect of ultrasonic wave and mechanical force that played an important role during the synthesis of MgFe2O4. In addition, the effect of the frequency of the ultrasonic wave on the ball milling process was investigated.

Rapid synthesis of rutile TiO 2 powders using microwave heating

“…It is especially advantageous for small pieces and materials that are difficult to heat with the lower frequencies [53,54]. Recently, microwave energy has been widely used in several fields of applications on both research and industrial processes [55][56][57][58][59][60][61][62][63].…”

Tuning of spinel magnesium ferrite nanoparticles with enhanced magnetic properties

“…Hankare et al 20 prepared polycrystalline magnesium ferrite by co-precipitation method and measured its gas-sensation. They found that the MgFe 2 O 4 based sensor exhibited a fast response and a good recovery towards petrol at 250 C. Chen et al 21 used ultrasonic waveassisted ball milling with magnesium carbonate and iron oxide and directly synthesized nano-sized MgFe 2 O 4 that got a saturation magnetization of 54.84 emu g À1 . But up to date, there is less report about the relationship between the composition, process and properties that is very important for its applications.…”

Multi-scale investigation of the formation and properties of high-grade rutile TiO 2 from titanium slags using microwave heating

“…Microwave irradiation technology is widely used in the metallurgy and materials industry, as its heating is uniform, i.e. the material can be heated inside and outside at the same time [16][17][18][19].…”