Properties and applications of nano-sized zinc ferrite

Ferrates of manganese, zinc, cobalt and nickel are important functional materials. Among them, Mn-Zn and Ni-Zn ferrite are the largest high frequency soft magnets in the world, which are commonly used as magnetic materials for high frequency transformers, inductors and recording heads. Ferrate is also an important catalyst, has been used in ammonia synthesis, Fischer-tropsch synthesis, as well as ethylbenzene, butene oxidation dehydrogenation reaction, it has broad application prospects in chemistry and chemical synthesis and other fields.

Spinel zinc ferrite is not only a soft magnetic material with excellent properties, which can be used as magnetic head material, giant magnetic material and microwave magnetic material, but also an excellent catalyst with photoelectric conversion
The performance is considered as a potential application of solar energy conversion materials.
The appearance is brown, the particles are spherical, the oil absorption is 50g/100g, the density is 5.20g/ om3, the refractive index n02.5, good thermal stability, non-toxic. It is made of zinc compound and iron oxide calcined and then ground. Due to the high price is mainly used for high heat resistance, non-toxic, inert occasions, such as plastic, enamel, toys and so on.
Zinc ferrite is a soft magnetic material with excellent properties, a catalyst for oxidative dehydrogenation of butene, and a semiconductor catalyst with high photocatalytic activity and sensitivity to visible light. Zinc ferrate nanocrystalline particles are transparent inorganic pigments with excellent properties.

The preparation of
ZnFe2O4 nanoparticles were prepared by homogeneous co-precipitation method with iron (Fe(acac)3) and zinc (Zn(acac)2.H2O) monohydrate as raw materials. XRD shows that these are ZnFe2O4 crystal particles with the particle size of 70-100nm which are composed of fine crystal seeds. By using methyl methacrylate (MMA) dispersion emulsion polymerization, ZnFe2O4/PMMA composite particles with core-shell structure at 30-70nm were obtained.

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